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In order to obtain the load-bearing characteristics of large diameter bolt under typical connection structure, ground test research on the basis of finite element analysis is carried out, which obtains the axial force and additional bending moment of large diameter bolt and revealsits failure mechanism. Analysis and test show that the additional bending moment is an important factor affecting the load-bearing capacity of large diameter bolts. After considering the additional bending moment, the equivalent axial force is several times of the initial axial force, which must be paid attention to in the design work. The formula for calculating the strength of large diameter bolt considering the influence of additional bending moment is proposed, which improves the accuracy. In addition, the method of reducing the additional bending moment of large diameter bolt is studied, and the direction of structural optimization is pointed out.
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为获得大直径螺栓典型连接结构的承载特性,在有限元分析的基础上开展地面试验研究,获得大直径螺栓的轴力与附加弯矩,揭示其破坏机理。分析及试验结果表明,附加弯矩是影响大直径螺栓承载能力的重要因素,考虑附加弯矩后,等效轴力是原始轴力的数倍。提出了考虑附加弯矩影响后的大直径螺栓强度计算公式,提高了预示精度。此外,开展了降低大直径螺栓附加弯矩的方法研究,指出了结构优化方向。
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张宏宇(1981—),男,高级工程师,主要研究方向为飞行器结构设计与强度分析。
刘晓华(1986-),女,高级工程师,主要研究方向为飞行器结构设计与强度分析。
范刚(1992—),男,工程师,主要研究方向为飞行器结构设计与强度分析。
王捷冰(1987—),男,高级工程师,主要研究方向为飞行器结构设计。
李凤全(1981—),男,高级工程师,主要研究方向为飞行器制造。
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2 Capital Aerospace Machinery Company,Beijing,100076), AuthorCompanyExt(id=1197483759344857502, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, companyId=1197483759328080283, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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Stress diagram of circular section connecting bolt under the action of bending moment, figureFileSmall=0syiFqnevjUs+04IW0mXtA==, figureFileBig=8EnQ8OZw/a2kpI8UBUikQA==, tableContent=null), ArticleFig(id=1197483761362317789, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图1, caption=
弯矩作用下圆截面连接螺栓受力示意 $h$—端框高度;$D$—分度圆直径;$x$—中性轴;$\varphi$—螺栓位置夹角;$M$—截面弯矩;$P$—拉应力。
, figureFileSmall=0syiFqnevjUs+04IW0mXtA==, figureFileBig=8EnQ8OZw/a2kpI8UBUikQA==, tableContent=null), ArticleFig(id=1197483761454592479, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 2, caption=
Large diameter bolt distribution and number, figureFileSmall=qfqLBFagOQ2XZthdtE8nTQ==, figureFileBig=/FLeiTbTo8cGp1m9wZhTxw==, tableContent=null), ArticleFig(id=1197483762507362785, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图2, caption=
大直径螺栓分布及编号, figureFileSmall=qfqLBFagOQ2XZthdtE8nTQ==, figureFileBig=/FLeiTbTo8cGp1m9wZhTxw==, tableContent=null), ArticleFig(id=1197483762582860259, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 3, caption=
Local deformation of large diameter bolt connection, figureFileSmall=Lsj6cESfI3SQr6FiAkvhUw==, figureFileBig=K6pNEqBJF0rUq2WSmRBIlw==, tableContent=null), ArticleFig(id=1197483762649969125, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图3, caption=
大直径螺栓局部连接结构示意, figureFileSmall=Lsj6cESfI3SQr6FiAkvhUw==, figureFileBig=K6pNEqBJF0rUq2WSmRBIlw==, tableContent=null), ArticleFig(id=1197483762733855207, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 4, caption=
Finite element analysis results of large diameter bolt load, figureFileSmall=ns/aYmV69DGT+uyacmoxQg==, figureFileBig=N0GcLyn43pVnZ2puH5tEOQ==, tableContent=null), ArticleFig(id=1197483762821935593, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图4, caption=
大直径螺栓载荷, figureFileSmall=ns/aYmV69DGT+uyacmoxQg==, figureFileBig=N0GcLyn43pVnZ2puH5tEOQ==, tableContent=null), ArticleFig(id=1197483762880655851, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 5, caption=
Local deformation of large diameter bolt connection, figureFileSmall=dYRoF3zfAI5ghkgH7h9IWA==, figureFileBig=Vq3W0dB6oBCCeks4Vgr14g==, tableContent=null), ArticleFig(id=1197483762943570411, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图5, caption=
大直径螺栓局部连接结构及变形示意, figureFileSmall=dYRoF3zfAI5ghkgH7h9IWA==, figureFileBig=Vq3W0dB6oBCCeks4Vgr14g==, tableContent=null), ArticleFig(id=1197483763044233709, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 6, caption=
Analysis model of large diameter bolt additional bending moment load reduction, figureFileSmall=9EATODoW/+/x/18JwEMPcg==, figureFileBig=9ayVC4Fuf71MWtkpxFfsvg==, tableContent=null), ArticleFig(id=1197483763115536879, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图6, caption=
大直径螺栓弯矩降载分析简化模型, figureFileSmall=9EATODoW/+/x/18JwEMPcg==, figureFileBig=9ayVC4Fuf71MWtkpxFfsvg==, tableContent=null), ArticleFig(id=1197483763182645745, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 7, caption=
Reverse installation programme, figureFileSmall=chGwyhnrPXb/n6BeQetjuA==, figureFileBig=6OogTA0umNBTdzU7rVSvyw==, tableContent=null), ArticleFig(id=1197483763241366003, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图7, caption=
反装结构, figureFileSmall=chGwyhnrPXb/n6BeQetjuA==, figureFileBig=6OogTA0umNBTdzU7rVSvyw==, tableContent=null), ArticleFig(id=1197483763346223606, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 8, caption=
Cover-palte programme, figureFileSmall=AyUx6zRiCQK+Fj4bHIrEGA==, figureFileBig=4AMRuuXokB9PCbO+xHYcng==, tableContent=null), ArticleFig(id=1197483763421721080, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图8, caption=
盖板结构, figureFileSmall=AyUx6zRiCQK+Fj4bHIrEGA==, figureFileBig=4AMRuuXokB9PCbO+xHYcng==, tableContent=null), ArticleFig(id=1197483763488829946, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 9, caption=
Spherical joint programme, figureFileSmall=zxIWeMbUO7Ml6bsJtPJ+2Q==, figureFileBig=01C7N4c4x2VtZR7dSbU6Zg==, tableContent=null), ArticleFig(id=1197483763555938812, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图9, caption=
大直径螺栓局部连接结构示意, figureFileSmall=zxIWeMbUO7Ml6bsJtPJ+2Q==, figureFileBig=01C7N4c4x2VtZR7dSbU6Zg==, tableContent=null), ArticleFig(id=1197483763618853374, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 10, caption=
Loading diagram of test, figureFileSmall=mHXKuL/J+w7CoyEd94d12A==, figureFileBig=NF4sn0xvLGXTNY7cdxUXxQ==, tableContent=null), ArticleFig(id=1197483763740488192, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图10, caption=
试验加载示意 $T$—在前端框施加的轴向载荷;$Q$—沿I-III象限线方向施加的剪力载荷;$M$—绕IV-II象限线施加弯矩载荷。
, figureFileSmall=mHXKuL/J+w7CoyEd94d12A==, figureFileBig=NF4sn0xvLGXTNY7cdxUXxQ==, tableContent=null), ArticleFig(id=1197483763815985666, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 11, caption=
Schematic diagram of strain position on explosion bolt, figureFileSmall=k84bGO49fpkREQ5HOPigMQ==, figureFileBig=ZSVJbCQN+4JqrYsvkqwkkA==, tableContent=null), ArticleFig(id=1197483763874705924, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图11, caption=
大直径螺栓弯矩测试方案, figureFileSmall=k84bGO49fpkREQ5HOPigMQ==, figureFileBig=ZSVJbCQN+4JqrYsvkqwkkA==, tableContent=null), ArticleFig(id=1197483763954397702, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 12, caption=
Change of axial force of large diameter bolt during test loading, figureFileSmall=Zk49FDdTKKG02uP46d8dPQ==, figureFileBig=1BCO7lf1TQoXq12hvSwg7w==, tableContent=null), ArticleFig(id=1197483764013117960, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图12, caption=
试验加载过程中大直径螺栓轴力变化, figureFileSmall=Zk49FDdTKKG02uP46d8dPQ==, figureFileBig=1BCO7lf1TQoXq12hvSwg7w==, tableContent=null), ArticleFig(id=1197483764076032522, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 13, caption=
Change of additional bending moment of large diameter bolt during test loading, figureFileSmall=57euhI/qBF8xfEFdxH1U3w==, figureFileBig=AsavEG97oOH0mm0A+ZiE+Q==, tableContent=null), ArticleFig(id=1197483764147335692, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图13, caption=
试验加载过程中大直径螺栓附加弯矩变化, figureFileSmall=57euhI/qBF8xfEFdxH1U3w==, figureFileBig=AsavEG97oOH0mm0A+ZiE+Q==, tableContent=null), ArticleFig(id=1197483764210250254, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 14, caption=
Secondary moments after the large diameter bolt is tightened in place, figureFileSmall=3NP6vNzMswGOfuYOEGUUww==, figureFileBig=+IS7bY+vr1t/kAK5/23nsA==, tableContent=null), ArticleFig(id=1197483764294136335, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图14, caption=
大直径螺栓拧紧到位后的附加弯矩, figureFileSmall=3NP6vNzMswGOfuYOEGUUww==, figureFileBig=+IS7bY+vr1t/kAK5/23nsA==, tableContent=null), ArticleFig(id=1197483764357050896, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 15, caption=
Theoretical distribution of bending stress of circular section, figureFileSmall=+wRuZm5AYjswW4YlXOQXzQ==, figureFileBig=NlqUb5OIb1FAfT/HPbXypQ==, tableContent=null), ArticleFig(id=1197483764415771153, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图15, caption=
圆截面弯曲应力理论分布示意, figureFileSmall=+wRuZm5AYjswW4YlXOQXzQ==, figureFileBig=NlqUb5OIb1FAfT/HPbXypQ==, tableContent=null), ArticleFig(id=1197483764470297106, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Fig. 16, caption=
Actual distribution of bending stress of circular section, figureFileSmall=IWgfhOOjC7xqU0Xe9nWrHw==, figureFileBig=OrJnvAHdVfg/qIRhlMqDxA==, tableContent=null), ArticleFig(id=1197483764537405971, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=图16, caption=
圆截面弯曲应力实际分布示意, figureFileSmall=IWgfhOOjC7xqU0Xe9nWrHw==, figureFileBig=OrJnvAHdVfg/qIRhlMqDxA==, tableContent=null), ArticleFig(id=1197483764587737620, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Tab. 1, caption=
Comparison of large diameter bolt load under different states, figureFileSmall=null, figureFileBig=null, tableContent=
| 状态 | 基准状态 | 反装结构 | 盖板结构 | 关节结构 |
| 轴力/kN | 150 | 120 | 140 | 170 |
| 弯矩/(N·m) | 1020 | 450 | 850 | 172 |
), ArticleFig(id=1197483764646457877, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=表1, caption=
不同方法下大直径螺栓弯矩降低对比, figureFileSmall=null, figureFileBig=null, tableContent=
| 状态 | 基准状态 | 反装结构 | 盖板结构 | 关节结构 |
| 轴力/kN | 150 | 120 | 140 | 170 |
| 弯矩/(N·m) | 1020 | 450 | 850 | 172 |
), ArticleFig(id=1197483764700983830, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=EN, label=Tab. 2, caption=
Equivalent axial force of large diameter bolt under different treatment conditions, figureFileSmall=null, figureFileBig=null, tableContent=
| 不同状态下等效轴力 | 大直径螺栓编号 |
| 1# | 2# | 2'# | 1'# |
| 工程方法 | 55 | 110 | 110 | 55 |
| 有限元分析 (仅轴力) | 70 | 93 | 93 | 70 |
| 有限元分析(轴力+弯矩) | 660 | 1100 | 1100 | 660 |
| 有限元分析(轴力+弯矩修正) | 420 | 700 | 700 | 420 |
| 试验结果(仅轴力) | 55 | 83 | 85 | 40 |
| 试验结果(轴力+弯矩) | 180 | 560 | 590 | 180 |
| 试验结果(轴力+弯矩修正) | 130 | 360 | 380 | 120 |
), ArticleFig(id=1197483764763898391, tenantId=1146029695717560320, journalId=1146119989267898375, articleId=1148011746939368051, language=CN, label=表2, caption=
不同状态下大直径螺栓等效轴力对比单位:$\mathrm{{kN}}$, figureFileSmall=null, figureFileBig=null, tableContent=
| 不同状态下等效轴力 | 大直径螺栓编号 |
| 1# | 2# | 2'# | 1'# |
| 工程方法 | 55 | 110 | 110 | 55 |
| 有限元分析 (仅轴力) | 70 | 93 | 93 | 70 |
| 有限元分析(轴力+弯矩) | 660 | 1100 | 1100 | 660 |
| 有限元分析(轴力+弯矩修正) | 420 | 700 | 700 | 420 |
| 试验结果(仅轴力) | 55 | 83 | 85 | 40 |
| 试验结果(轴力+弯矩) | 180 | 560 | 590 | 180 |
| 试验结果(轴力+弯矩修正) | 130 | 360 | 380 | 120 |
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