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Aiming at the problem of the weld fatigue test of the new energy vehicle subframe, a program load spectrum compilation method based on the failure dominant load was proposed. Firstly, the finite element model of the rear subframe was established, and the stress distribution under unit load was coupled with the load of each connection point. The structural stress method was used to evaluate the fatigue life of the subframe welds, and six dangerous points that were easy to fail were selected. Secondly, by comparing the load damage of each connection point, the failure dominant connection point corresponding to the weld dangerous unit was determined. Then, the failure dominant load was determined by the principal stress analysis, time domain correlation and uniaxial damage contribution at the weld, so as to reduce the dimension of the multi-axial load and reduce the difficulty of the bench test loading. Finally, a pseudo-damage matrix was output based on the failure dominant load, the characteristic working conditions and their proportions were selected to obtain the load spectrum of the fatigue accelerated test program, and the minimum number of cycles was determined according to the principle of the damage equivalence. The numerical simulation results show that the program load spectrum can reproduce the damage of dangerous points and has a high acceleration coefficient, which verifies the effectiveness of the accelerated test spectrum.
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针对新能源汽车副车架的焊缝疲劳试验问题,提出一种基于失效主导载荷的程序载荷谱编制方法。首先,建立后副车架有限元模型,将单位载荷下应力分布与各连接点载荷相耦合,运用结构应力法对副车架焊缝进行疲劳寿命评估,并筛选出容易失效的6处危险点;其次,通过对比各连接点载荷损伤大小,确定焊缝危险单元对应的失效主导连接点;然后,通过焊缝处主应力分析、时域相关性和单轴损伤贡献量确定失效主导载荷,实现多轴载荷降维,降低台架试验加载难度;最后,基于失效主导载荷输出伪损伤矩阵,挑选特征工况及其比例得到疲劳加速试验程序载荷谱,根据损伤等效原则确定其最小循环次数。数值仿真结果表明,程序载荷谱能够复现危险点损伤,且具有较高的加速系数,验证了加速试验谱的有效性。
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赵礼辉,男,1985年生,山东青岛人,博士,副教授,硕士研究生导师;主要研究方向为车辆结构可靠性与耐久性评价、多场耦合动力学与失效物理建模、车辆运行大数据挖掘与寿命管理数字孪生;E-mail:Pheigoe@126.com。
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1.School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2.CMIF Key Laboratory for Strength and Reliability Evaluation of Automotive Structures, Shanghai 200093, China
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1.上海理工大学 机械工程学院,上海 200093
2.机械工业汽车机械零部件强度与可靠性评价重点实验室,上海 200093
3.上海市新能源汽车可靠性评价专业技术服务平台,上海 200093, bio={"content":"
赵礼辉,男,1985年生,山东青岛人,博士,副教授,硕士研究生导师;主要研究方向为车辆结构可靠性与耐久性评价、多场耦合动力学与失效物理建模、车辆运行大数据挖掘与寿命管理数字孪生;E-mail:Pheigoe@126.com。
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赵礼辉,男,1985年生,山东青岛人,博士,副教授,硕士研究生导师;主要研究方向为车辆结构可靠性与耐久性评价、多场耦合动力学与失效物理建模、车辆运行大数据挖掘与寿命管理数字孪生;E-mail:Pheigoe@126.com。
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4.Time Navigator Truck Factory of Beiqi Foton Automobile Co., Ltd., Zhucheng 262200, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241451339268543209, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, authorId=1241451338987524828, language=CN, stringName=梁山, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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4.北汽福田汽车股份有限公司时代领航卡车工厂,诸城 262200, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1241451338140275362, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, xref=4., ext=[AuthorCompanyExt(id=1241451338144469667, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, companyId=1241451338140275362, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1.School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2.CMIF Key Laboratory for Strength and Reliability Evaluation of Automotive Structures, Shanghai 200093, China
3.Shanghai Technical Service Platform for Reliability Evaluation of New Energy Vehicles, Shanghai 200093, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241451339687973639, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, authorId=1241451339373400816, language=CN, stringName=翁硕, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, address=
1.上海理工大学 机械工程学院,上海 200093
2.机械工业汽车机械零部件强度与可靠性评价重点实验室,上海 200093
3.上海市新能源汽车可靠性评价专业技术服务平台,上海 200093, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1241451336408027782, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, xref=1., ext=[AuthorCompanyExt(id=1241451336416416390, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, companyId=1241451336408027782, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1, 2, 3, address=
1.School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2.CMIF Key Laboratory for Strength and Reliability Evaluation of Automotive Structures, Shanghai 200093, China
3.Shanghai Technical Service Platform for Reliability Evaluation of New Energy Vehicles, Shanghai 200093, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241451340048683811, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, authorId=1241451339776054031, language=CN, stringName=冯金芝, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.上海理工大学 机械工程学院,上海 200093
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Finite element model of the rear subframe, figureFileSmall=HNUAeJ5kW0YPZHw7gTuwxw==, figureFileBig=RIP11ezTdJfKpMrSjb6GYQ==, tableContent=null), ArticleFig(id=1241451343542539188, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图1, caption=
后副车架有限元模型, figureFileSmall=HNUAeJ5kW0YPZHw7gTuwxw==, figureFileBig=RIP11ezTdJfKpMrSjb6GYQ==, tableContent=null), ArticleFig(id=1241451343710311360, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.2, caption=
Stress distribution in the left camber link under unit vertical force, figureFileSmall=jKYY1+thXd+7YKMvG4EtLw==, figureFileBig=I1/TGfeU3MUrgbHLG3THxg==, tableContent=null), ArticleFig(id=1241451343815168967, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图2, caption=
外倾杆左侧单位垂向力下的应力分布, figureFileSmall=jKYY1+thXd+7YKMvG4EtLw==, figureFileBig=I1/TGfeU3MUrgbHLG3THxg==, tableContent=null), ArticleFig(id=1241451343920026573, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.3, caption=
Connection point load of the left camber link in Belgian road, figureFileSmall=sEZDwFmcJFSys0/JoiSJLA==, figureFileBig=HYuI5z+J186gOTW/WxITVQ==, tableContent=null), ArticleFig(id=1241451344037467092, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图3, caption=
比利时路左侧外倾连杆连接点载荷, figureFileSmall=sEZDwFmcJFSys0/JoiSJLA==, figureFileBig=HYuI5z+J186gOTW/WxITVQ==, tableContent=null), ArticleFig(id=1241451344142324698, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.4, caption=
Stress-life curve of the weld material, figureFileSmall=K44ZqoVVZO4YX6F72gnBEA==, figureFileBig=8Qgq3pQeN2RIkNmsgN8hrQ==, tableContent=null), ArticleFig(id=1241451344247182303, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图4, caption=
焊缝材料应力-寿命曲线, figureFileSmall=K44ZqoVVZO4YX6F72gnBEA==, figureFileBig=8Qgq3pQeN2RIkNmsgN8hrQ==, tableContent=null), ArticleFig(id=1241451344381400038, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.5, caption=
Life nephogram of the subframe’s welds, figureFileSmall=pnRA/kK5DnkZobqb7dFVxA==, figureFileBig=A3Lj4xfg7Dbea+wiRJnPoA==, tableContent=null), ArticleFig(id=1241451344528200683, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图5, caption=
副车架焊缝寿命云图, figureFileSmall=pnRA/kK5DnkZobqb7dFVxA==, figureFileBig=A3Lj4xfg7Dbea+wiRJnPoA==, tableContent=null), ArticleFig(id=1241451344628863981, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.6, caption=
Comparison of damage under road load data and under load conditions in the virtual test field, figureFileSmall=j1JhMzF3+O/kOfCy7+7QaA==, figureFileBig=ng3295eN0XBSwvi5McQoPA==, tableContent=null), ArticleFig(id=1241451344838579199, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图6, caption=
道路载荷数据与虚拟试验场载荷下的损伤对比, figureFileSmall=j1JhMzF3+O/kOfCy7+7QaA==, figureFileBig=ng3295eN0XBSwvi5McQoPA==, tableContent=null), ArticleFig(id=1241451344976990216, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.7, caption=
Vertical-force series load of the left camber link, figureFileSmall=th4HADCRxvOkVCPt2zM8TQ==, figureFileBig=s0t8qNGCl4pktXFdMtirTw==, tableContent=null), ArticleFig(id=1241451345086042125, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图7, caption=
左侧外倾杆垂向力串接载荷, figureFileSmall=th4HADCRxvOkVCPt2zM8TQ==, figureFileBig=s0t8qNGCl4pktXFdMtirTw==, tableContent=null), ArticleFig(id=1241451345203482643, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.8, caption=
Schematic diagram of virtual strain rosette arrangement, figureFileSmall=SQNqM9pD2RLTsQSQl+iiPg==, figureFileBig=Yp0dJcaRGHib7vtxPzr7SQ==, tableContent=null), ArticleFig(id=1241451345316728858, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图8, caption=
虚拟应变花布置示意图, figureFileSmall=SQNqM9pD2RLTsQSQl+iiPg==, figureFileBig=Yp0dJcaRGHib7vtxPzr7SQ==, tableContent=null), ArticleFig(id=1241451346805706783, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.9, caption=
Absolute maximum principal stress at 1# danger point, figureFileSmall=JOePNWe1vo+IVf80L2DWKw==, figureFileBig=7Ef5UWLf7eKvi1tuSiATMw==, tableContent=null), ArticleFig(id=1241451346906370082, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图9, caption=
1#危险点处绝对值最大主应力, figureFileSmall=JOePNWe1vo+IVf80L2DWKw==, figureFileBig=7Ef5UWLf7eKvi1tuSiATMw==, tableContent=null), ArticleFig(id=1241451346986061863, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.10, caption=
Distribution of the absolute maximum principal stress at 1#danger point, figureFileSmall=MI7YIaU5LW5xy+cJo8qdCg==, figureFileBig=XVfk9OjHqogJen5HJ6BIPg==, tableContent=null), ArticleFig(id=1241451347086725168, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图10, caption=
1#危险点处绝对值最大主应力分布, figureFileSmall=MI7YIaU5LW5xy+cJo8qdCg==, figureFileBig=XVfk9OjHqogJen5HJ6BIPg==, tableContent=null), ArticleFig(id=1241451347174805556, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.11, caption=
Distribution of damage to dangerous elements in welds, figureFileSmall=WndlSdvQgd5JNBr+wpNZvw==, figureFileBig=L7CJf2XZiEi30IUKXEp46A==, tableContent=null), ArticleFig(id=1241451347254497334, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图11, caption=
焊缝危险单元损伤分布, figureFileSmall=WndlSdvQgd5JNBr+wpNZvw==, figureFileBig=L7CJf2XZiEi30IUKXEp46A==, tableContent=null), ArticleFig(id=1241451347367743551, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.12, caption=
Uniaxial time-domain correlation of 1# dangerous point, figureFileSmall=2wj9GKr3IqHVMuMd2Cy/0g==, figureFileBig=Jg8Y5db1cNvh8Q41o2c/3w==, tableContent=null), ArticleFig(id=1241451347476795461, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图12, caption=
1#危险点单轴时域相关性, figureFileSmall=2wj9GKr3IqHVMuMd2Cy/0g==, figureFileBig=Jg8Y5db1cNvh8Q41o2c/3w==, tableContent=null), ArticleFig(id=1241451347560681544, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.13, caption=
Uniaxial load damage contribution of 1# danger point, figureFileSmall=s54qyneTf0ScXo+CN6yFYQ==, figureFileBig=E9GD5aE4lgsm2yPb0z1yOA==, tableContent=null), ArticleFig(id=1241451347648761932, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图13, caption=
1#危险点单轴载荷损伤贡献量, figureFileSmall=s54qyneTf0ScXo+CN6yFYQ==, figureFileBig=E9GD5aE4lgsm2yPb0z1yOA==, tableContent=null), ArticleFig(id=1241451347778785364, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.14, caption=
Matrix histogram of channel ARB_L_Fz rain flow count, figureFileSmall=WyEB13YS8me7fXqR2UcuYQ==, figureFileBig=8SkOjy6mZOmvIv9Qvao2yg==, tableContent=null), ArticleFig(id=1241451347883642968, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图14, caption=
通道ARB_L_Fz雨流计数矩阵直方图, figureFileSmall=WyEB13YS8me7fXqR2UcuYQ==, figureFileBig=8SkOjy6mZOmvIv9Qvao2yg==, tableContent=null), ArticleFig(id=1241451347980111965, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.15, caption=
Damage tarsfer from small loads to large loads, figureFileSmall=oSUrfg6W3v6o6OPeJe/7jg==, figureFileBig=CCnMQhOcULTD6X0dliQS7w==, tableContent=null), ArticleFig(id=1241451348093358179, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图15, caption=
小载荷向大载荷的损伤转移, figureFileSmall=oSUrfg6W3v6o6OPeJe/7jg==, figureFileBig=CCnMQhOcULTD6X0dliQS7w==, tableContent=null), ArticleFig(id=1241451348194021481, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Fig.16, caption=
Program load spectrum of the subframe fatigue test, figureFileSmall=sq7q0I8tY4CzQG9+pD3h7w==, figureFileBig=WjMLtj0EaNbXoSKep+NZ+Q==, tableContent=null), ArticleFig(id=1241451348277907568, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=图16, caption=
副车架疲劳试验程序载荷谱, figureFileSmall=sq7q0I8tY4CzQG9+pD3h7w==, figureFileBig=WjMLtj0EaNbXoSKep+NZ+Q==, tableContent=null), ArticleFig(id=1241451348382765172, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Tab.1, caption=
Material property of SAPH440 steel
, figureFileSmall=null, figureFileBig=null, tableContent=
屈服强度 Yield strength/MPa | 抗拉强度 Tensile strength/MPa | 弹性模量 Modulus of elasticity/MPa | 泊松比 Poisson ratio | 密度 Density/(t/mm3) |
|---|
| 305 | 440 | 2.1×105 | 0.3 | 7.8×10-9 |
), ArticleFig(id=1241451348500205692, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=表1, caption=
SAPH440钢的材料属性
, figureFileSmall=null, figureFileBig=null, tableContent=
屈服强度 Yield strength/MPa | 抗拉强度 Tensile strength/MPa | 弹性模量 Modulus of elasticity/MPa | 泊松比 Poisson ratio | 密度 Density/(t/mm3) |
|---|
| 305 | 440 | 2.1×105 | 0.3 | 7.8×10-9 |
), ArticleFig(id=1241451348600868992, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Tab.2, caption=
Cycle times of each typical road condition
, figureFileSmall=null, figureFileBig=null, tableContent=
| 路况Road condition | 循环次数Number of cycles |
|---|
| 搓板路Washboard road | 2 700 |
| 比利时路Belgian road | 900 |
| 坑洼路Pothole road | 5 400 |
| 正弦斜坡Sine slope | 2 700 |
| 铁轨路Rail road | 400 |
), ArticleFig(id=1241451348714115205, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=表2, caption=
各典型路况循环次数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 路况Road condition | 循环次数Number of cycles |
|---|
| 搓板路Washboard road | 2 700 |
| 比利时路Belgian road | 900 |
| 坑洼路Pothole road | 5 400 |
| 正弦斜坡Sine slope | 2 700 |
| 铁轨路Rail road | 400 |
), ArticleFig(id=1241451348781224074, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Tab.3, caption=
Statistics of failure danger points of welds
, figureFileSmall=null, figureFileBig=null, tableContent=
危险点编号 Dangerous point number | 单元ID Element ID | 损伤 Damage | 寿命 Life | 危险部位描述 Dangerous area description |
|---|
| 1# | 86 064 | 1.31 | 0.76 | 前梁与左纵梁连接处 Connection between the front beam and the left longitudinal beam |
| 2# | 2 042 928 | 1.1 | 0.91 | ODP支架与右前束杆支架连接处 Connection between ODP bracket and the right toe link bracket |
| 3# | 2 029 513 | 0.52 | 1.92 | ODP支架与左纵梁连接处 Connection between ODP bracket and the left longitudinal beam |
| 4# | 2 036 540 | 0.50 | 1.96 | 右前束杆支架与ODP支架连接处 Connection between the right toe link bracket and ODP bracket |
| 5# | 85 577 | 0.48 | 2.08 | 左外倾杆支架与前梁连接处 Connection between the left camber link bracket and the front beam |
| 6# | 138 361 | 0.44 | 2.27 | 后上梁与左纵梁连接处 Connection between the rear upper beam and the left longitudinal beam |
), ArticleFig(id=1241451348860915855, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=表3, caption=
焊缝失效危险点统计
, figureFileSmall=null, figureFileBig=null, tableContent=
危险点编号 Dangerous point number | 单元ID Element ID | 损伤 Damage | 寿命 Life | 危险部位描述 Dangerous area description |
|---|
| 1# | 86 064 | 1.31 | 0.76 | 前梁与左纵梁连接处 Connection between the front beam and the left longitudinal beam |
| 2# | 2 042 928 | 1.1 | 0.91 | ODP支架与右前束杆支架连接处 Connection between ODP bracket and the right toe link bracket |
| 3# | 2 029 513 | 0.52 | 1.92 | ODP支架与左纵梁连接处 Connection between ODP bracket and the left longitudinal beam |
| 4# | 2 036 540 | 0.50 | 1.96 | 右前束杆支架与ODP支架连接处 Connection between the right toe link bracket and ODP bracket |
| 5# | 85 577 | 0.48 | 2.08 | 左外倾杆支架与前梁连接处 Connection between the left camber link bracket and the front beam |
| 6# | 138 361 | 0.44 | 2.27 | 后上梁与左纵梁连接处 Connection between the rear upper beam and the left longitudinal beam |
), ArticleFig(id=1241451348944801936, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Tab.4, caption=
Statistics of failure dominant connection points
, figureFileSmall=null, figureFileBig=null, tableContent=
危险单元编号 Dangerous element number | 失效主导连接点 Failure dominant connection point |
|---|
| 1# | 横向稳定杆左侧 Left side of the anti-roll bar-ARB_L |
| 2#、4# | 弹簧连杆右侧 Right side of the spring link-Spring_R |
| 3#、5# | 前束杆左侧 Left side of the toe link-Toelink_L |
| 6# | 横向稳定杆右侧 Right side of the anti-roll bar-ARB_R |
), ArticleFig(id=1241451349037076628, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=表4, caption=
失效主导连接点统计
, figureFileSmall=null, figureFileBig=null, tableContent=
危险单元编号 Dangerous element number | 失效主导连接点 Failure dominant connection point |
|---|
| 1# | 横向稳定杆左侧 Left side of the anti-roll bar-ARB_L |
| 2#、4# | 弹簧连杆右侧 Right side of the spring link-Spring_R |
| 3#、5# | 前束杆左侧 Left side of the toe link-Toelink_L |
| 6# | 横向稳定杆右侧 Right side of the anti-roll bar-ARB_R |
), ArticleFig(id=1241451349137739930, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Tab.5, caption=
Correlation coefficient between the principal stress at 1# danger point and each axial load of the left ARB
, figureFileSmall=null, figureFileBig=null, tableContent=
危险单元 Dangerous element | 连接点 Connection point | Fx | Fy | Fz | Mx | My | Mz |
|---|
| 86 064 | 横向稳定杆左侧 Left side of the anti-roll bar-ARB_L | -0.807 | 0.508 | 0.979 | -0.975 | -0.366 | -0.945 |
), ArticleFig(id=1241451349246791838, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=表5, caption=
1#危险点主应力与横向稳定杆左侧各轴向载荷相关系数
, figureFileSmall=null, figureFileBig=null, tableContent=
危险单元 Dangerous element | 连接点 Connection point | Fx | Fy | Fz | Mx | My | Mz |
|---|
| 86 064 | 横向稳定杆左侧 Left side of the anti-roll bar-ARB_L | -0.807 | 0.508 | 0.979 | -0.975 | -0.366 | -0.945 |
), ArticleFig(id=1241451349355843745, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Tab.6, caption=
Summary of failure dominant load channels
, figureFileSmall=null, figureFileBig=null, tableContent=
危险点编号 Dangerous point number | 失效主导连接点 Failure dominant connection point | 载荷通道 Load channel |
|---|
| 1# | 横向稳定杆左侧 Left side of the anti-roll bar-ARB_L | Fz |
| 2#、4# | 弹簧连杆右侧 Right side of the spring link-Spring_R | Fy |
| 3#、5#、6# | 前束杆左侧 Left side of the toe link-Toelink_L | Fy |
), ArticleFig(id=1241451349439729831, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=表6, caption=
失效主导载荷通道汇总
, figureFileSmall=null, figureFileBig=null, tableContent=
危险点编号 Dangerous point number | 失效主导连接点 Failure dominant connection point | 载荷通道 Load channel |
|---|
| 1# | 横向稳定杆左侧 Left side of the anti-roll bar-ARB_L | Fz |
| 2#、4# | 弹簧连杆右侧 Right side of the spring link-Spring_R | Fy |
| 3#、5#、6# | 前束杆左侧 Left side of the toe link-Toelink_L | Fy |
), ArticleFig(id=1241451349599113387, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Tab.7, caption=
Pseudo damage matrix and damage contribution of each level of load
, figureFileSmall=null, figureFileBig=null, tableContent=
均值 Mean value/N | 变程 Range/N |
|---|
| 840.321 | 2 520.96 | 4 201.6 | 5 882.25 | 7 562.89 | 9 243.53 | 10 924.2 | 12 604.8 |
|---|
| 5 971.99 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4 761.81 | 2.40×10-5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 551.62 | 1.68×10-3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 341.44 | 2.60×10-3 | 3.90×10-3 | 1.50×10-2 | 0 | 0 | 0 | 0 | 0 |
| 1 131.26 | 2.11×10-2 | 1.32×10-1 | 3.91×10-1 | 5.77×10-1 | 4.73×10-1 | 3.52×10-1 | 0 | 0 |
| 78.925 | 1.34×10-1 | 1.97 | 6.46 | 6.06 | 1.31×101 | 9.15 | 5.49 | 2.43 |
| -1 289.11 | 1.59×10-2 | 5.26×10-2 | 9.02×10-2 | 5.77×10-2 | 1.58×10-1 | 3.52×10-1 | 0 | 0 |
| -2 499.29 | 1.61×10-3 | 1.95×10-3 | 1.50×10-2 | 0 | 0 | 0 | 0 | 0 |
| -3 709.47 | 1.13×10-3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| -4 919.66 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| -6 129.84 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
损伤贡献 Damage contribution/% | 0.37 | 4.55 | 14.67 | 14.09 | 28.88 | 20.74 | 11.56 | 5.12 |
), ArticleFig(id=1241451349729136817, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=表7, caption=
伪损伤矩阵及各级载荷损伤贡献
, figureFileSmall=null, figureFileBig=null, tableContent=
均值 Mean value/N | 变程 Range/N |
|---|
| 840.321 | 2 520.96 | 4 201.6 | 5 882.25 | 7 562.89 | 9 243.53 | 10 924.2 | 12 604.8 |
|---|
| 5 971.99 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4 761.81 | 2.40×10-5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 551.62 | 1.68×10-3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 341.44 | 2.60×10-3 | 3.90×10-3 | 1.50×10-2 | 0 | 0 | 0 | 0 | 0 |
| 1 131.26 | 2.11×10-2 | 1.32×10-1 | 3.91×10-1 | 5.77×10-1 | 4.73×10-1 | 3.52×10-1 | 0 | 0 |
| 78.925 | 1.34×10-1 | 1.97 | 6.46 | 6.06 | 1.31×101 | 9.15 | 5.49 | 2.43 |
| -1 289.11 | 1.59×10-2 | 5.26×10-2 | 9.02×10-2 | 5.77×10-2 | 1.58×10-1 | 3.52×10-1 | 0 | 0 |
| -2 499.29 | 1.61×10-3 | 1.95×10-3 | 1.50×10-2 | 0 | 0 | 0 | 0 | 0 |
| -3 709.47 | 1.13×10-3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| -4 919.66 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| -6 129.84 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
损伤贡献 Damage contribution/% | 0.37 | 4.55 | 14.67 | 14.09 | 28.88 | 20.74 | 11.56 | 5.12 |
), ArticleFig(id=1241451349829800118, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=EN, label=Tab.8, caption=
Characteristic working conditions and proportions of the subframe fatigue acceleration test
, figureFileSmall=null, figureFileBig=null, tableContent=
| 载荷等级Load level | 低Low | 中Medium | 高High |
|---|
特征工况载荷 Characteristic working condition load/N | 4 201.6 | 7 562.89 | 12 604.8 |
| 特征工况均值Mean value of characteristic working conditions/N | -78.9 | -78.9 | -78.9 |
| 总伪损伤量Total pseudo damage amount | 9.316 240 649 | 20.424 629 99 | 17.788 085 39 |
单次载荷伪损伤量 Pseudo damage amount under single load | 0.015 029 994 | 0.157 779 70 | 1.217 429 54 |
各载荷等级循环次数 Number of cycles per load level | 620 | 130 | 15 |
), ArticleFig(id=1241451351360721083, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241408881520341814, language=CN, label=表8, caption=
副车架疲劳加速试验特征工况及比例
, figureFileSmall=null, figureFileBig=null, tableContent=
| 载荷等级Load level | 低Low | 中Medium | 高High |
|---|
特征工况载荷 Characteristic working condition load/N | 4 201.6 | 7 562.89 | 12 604.8 |
| 特征工况均值Mean value of characteristic working conditions/N | -78.9 | -78.9 | -78.9 |
| 总伪损伤量Total pseudo damage amount | 9.316 240 649 | 20.424 629 99 | 17.788 085 39 |
单次载荷伪损伤量 Pseudo damage amount under single load | 0.015 029 994 | 0.157 779 70 | 1.217 429 54 |
各载荷等级循环次数 Number of cycles per load level | 620 | 130 | 15 |
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Minimum number of cycles of the fatigue acceleration test at 1# danger point
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| 目标损伤Target damage | 1.31 |
|---|
单次载荷谱损伤 Single load spectrum damage | 0.000 260 8 |
| 最小循环次数Minimum number of cycles | 5 024 |
| 总试验时长Total test duration/h | 1 123.4 |
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1#危险点疲劳加速试验最小循环次数
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| 目标损伤Target damage | 1.31 |
|---|
单次载荷谱损伤 Single load spectrum damage | 0.000 260 8 |
| 最小循环次数Minimum number of cycles | 5 024 |
| 总试验时长Total test duration/h | 1 123.4 |
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Accelerated spectrum statistics of the subframe fatigue test
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危险点编号 Dangerous point number | 加速谱载荷通道 Accelerated spectrum load channel | 幅值 Amplitude/N | 循环次数 Number of cycles |
|---|
| 1# | 左侧横向稳定杆垂向力 Vertical force on the left side of the anti-roll bar-ARB_L_Fz | 11 345 | 350 |
| 2#、4# | 右侧弹簧连杆侧向力 Lateral force on the right side of the spring link-Spring_R_Fy | 14 412 | 2 100 |
| 3#、5#、6# | 左侧前束杆侧向力 Lateral force on the left side of the toe link-Toelink_L_Fy | 15 700 | 2 600 |
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副车架疲劳试验加速谱统计
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危险点编号 Dangerous point number | 加速谱载荷通道 Accelerated spectrum load channel | 幅值 Amplitude/N | 循环次数 Number of cycles |
|---|
| 1# | 左侧横向稳定杆垂向力 Vertical force on the left side of the anti-roll bar-ARB_L_Fz | 11 345 | 350 |
| 2#、4# | 右侧弹簧连杆侧向力 Lateral force on the right side of the spring link-Spring_R_Fy | 14 412 | 2 100 |
| 3#、5#、6# | 左侧前束杆侧向力 Lateral force on the left side of the toe link-Toelink_L_Fy | 15 700 | 2 600 |
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Result statistics of the accelerated spectrum validation
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危险点编号 Dangerous point number | 目标损伤 Target damage | 加速损伤 Accelerated damage | 加速试验时长/h Acceleration test duration/h | 原始载荷时长 Original load duration/h | 加速系数 Acceleratio n factor |
|---|
| 1# | 1.31 | 1.32 | 78.3 | | 5 |
| 2# | 1.1 | 1.11 | 107.9 | | 4 |
| 3# | 0.52 | 0.53 | 29.6 | | 1 3 |
| 4# | 0.5 | 0.73 | 103.4 | 378.2 | 4 |
| 5# | 0.48 | 0.65 | 21.7 | | 1 7 |
| 6# | 0.44 | 0.45 | 49.8 | | 8 |
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加速谱验证结果统计
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危险点编号 Dangerous point number | 目标损伤 Target damage | 加速损伤 Accelerated damage | 加速试验时长/h Acceleration test duration/h | 原始载荷时长 Original load duration/h | 加速系数 Acceleratio n factor |
|---|
| 1# | 1.31 | 1.32 | 78.3 | | 5 |
| 2# | 1.1 | 1.11 | 107.9 | | 4 |
| 3# | 0.52 | 0.53 | 29.6 | | 1 3 |
| 4# | 0.5 | 0.73 | 103.4 | 378.2 | 4 |
| 5# | 0.48 | 0.65 | 21.7 | | 1 7 |
| 6# | 0.44 | 0.45 | 49.8 | | 8 |
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