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To address the issue of gearboxes’ vibration and noise, multi-objective topology optimization was adopted to optimize the box structure.First, a combination weighting method known as game theory comprehensive analytic hierarchy process and grey correlation was proposed to allocate optimal weight values to sub-objectives. At the same time, the iterative curves of the optimization results of the three weighting methods were compared to verify the advantages of the combination weighting method.Then, the compromise programming method was used to normalize the sub objectives to obtain the comprehensive objective function.Finally, based on the topology optimization results, stress displacement nephogram, and modal shapes, the box structure was improved.Compared with the original box, the improved box reduces the mass by 11.2%,the maximum stress of the box decreases by 39.6%, the displacement decreases by 5.1%, the node displacement amplitude response decreases by 82.8%, and the all first four-order frequencies increase.The proposed weight allocation method improves the disadvantages of low reliability of sub objective weight value allocation and ignoring subjective judgment,realizes the lightweight of the box. After the improvement of the box structure, the static and dynamic performances are significantly improved.
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针对齿轮箱振动噪声问题,采用多目标拓扑优化,优化箱体结构。首先,提出使用博弈论综合层次分析和灰色关联,即组合赋权法分配子目标最优权重值,同时对比3种赋权法优化结果的迭代曲线,验证组合赋权法的优越性。然后,使用折衷规划法归一化子目标得到综合目标函数。最后,根据拓扑优化结果、应力位移云图和模态振型改进箱体结构,改进后箱体相较于原箱体:箱体质量减轻11.2%,箱体最大应力下降39.6%,位移下降5.1%,节点位移幅值响应下降82.8%,前4阶频率均有所上升。所提权重分配方法改善了子目标权重值分配可信度不高、忽略主观判断等缺点;实现了箱体的轻量化;箱体结构改进后静动态性能大幅提升。
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1.School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei 230601, China
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1.安徽建筑大学 机械与电气工程学院,合肥 230601
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刘伟,男,1982年生,安徽合肥人,硕士,研究员;主要研究方向为建筑机器人及智能装备、高端装备多物理场耦合分析;E-mail:weiliu8202@163.com。
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刘伟,男,1982年生,安徽合肥人,硕士,研究员;主要研究方向为建筑机器人及智能装备、高端装备多物理场耦合分析;E-mail:weiliu8202@163.com。
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1.安徽建筑大学 机械与电气工程学院,合肥 230601
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1.School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei 230601, China
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1.安徽建筑大学 机械与电气工程学院,合肥 230601
2.高端装备关键摩擦副安徽省重点实验室.合肥 230601, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1241029734319059013, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, xref=1., ext=[AuthorCompanyExt(id=1241029734327447622, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, companyId=1241029734319059013, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.Anhui Province Key Laboratory of Critical Friction Pair for Advanced Equipment, Hefei 230601, China
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2.高端装备关键摩擦副安徽省重点实验室.合肥 230601
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1.School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei 230601, China
2.Anhui Province Key Laboratory of Critical Friction Pair for Advanced Equipment, Hefei 230601, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241029737255071940, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, authorId=1241029737070522551, language=CN, stringName=李昊, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.安徽建筑大学 机械与电气工程学院,合肥 230601
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34(1):92-97.(In Chinese), articleTitle=Gearbox vibration and noise simulation analysis and structure optimization, refAbstract=null)], funds=[Fund(id=1241029743974347287, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=2022AH020025, language=EN, fundingSource=Anhui Province Outstanding Youth Research Project in Colleges and Universities(2022AH020025), fundOrder=null, country=null), Fund(id=1241029744066621981, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=2022AH020025, language=CN, fundingSource=安徽省高校杰出青年科研项目(2022AH020025), fundOrder=null, country=null), Fund(id=1241029744146313763, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=2022AH050257, language=EN, fundingSource=Anhui Province Key Research Project in Natural Sciences of Higher Education(2022AH050257), fundOrder=null, country=null), Fund(id=1241029744209228327, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=2022AH050257, language=CN, fundingSource=安徽省高等学校自然科学重点研究项目(2022AH050257), fundOrder=null, country=null), Fund(id=1241029744305697329, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=202317, language=EN, fundingSource=Hefei Natural Science Foundation Project(202317), fundOrder=null, country=null), Fund(id=1241029744393777716, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=202317, language=CN, fundingSource=合肥市自然科学基金项目(202317), fundOrder=null, country=null), Fund(id=1241029745878561340, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=2019QDZ46, language=EN, fundingSource=Introduction of Talents and Doctoral Startup Fund Project of Anhui Jianzhu University(2019QDZ46), fundOrder=null, country=null), Fund(id=1241029745983418945, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=2019QDZ46, language=CN, fundingSource=安徽建筑大学引进人才及博士启动基金项目(2019QDZ46), fundOrder=null, country=null), Fund(id=1241029746050527815, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=SDIC2023-03, language=EN, fundingSource=National Development and Investment Group Co., Ltd. Technology Project(SDIC2023-03), fundOrder=null, country=null), Fund(id=1241029746138608205, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, awardId=SDIC2023-03, language=CN, fundingSource=国家开发投资集团有限公司科技项目(SDIC2023-03), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241029734319059013, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, xref=1., ext=[AuthorCompanyExt(id=1241029734327447622, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, companyId=1241029734319059013, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1.安徽建筑大学 机械与电气工程学院,合肥 230601)]), AuthorCompany(id=1241029734411333712, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, xref=2., ext=[AuthorCompanyExt(id=1241029734415528018, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, companyId=1241029734411333712, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.高端装备关键摩擦副安徽省重点实验室.合肥 230601)]), AuthorCompany(id=1241029734507802716, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, xref=3., ext=[AuthorCompanyExt(id=1241029734516191324, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, companyId=1241029734507802716, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3.Hefei Bolin Advanced Materials Co., Ltd., Hefei 230601, China), AuthorCompanyExt(id=1241029734520385629, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, companyId=1241029734507802716, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3.合肥波林新材料股份有限公司,合肥 230601)])], figs=[ArticleFig(id=1241029738756632875, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.1, caption=
3D model of gearbox, figureFileSmall=GZ5Xyg+lgbncMcJucerdIg==, figureFileBig=Ev9IxGiocKW71Y+XokJ1Kw==, tableContent=null), ArticleFig(id=1241029738857296175, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图1, caption=
齿轮箱三维模型, figureFileSmall=GZ5Xyg+lgbncMcJucerdIg==, figureFileBig=Ev9IxGiocKW71Y+XokJ1Kw==, tableContent=null), ArticleFig(id=1241029739054428475, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.2, caption=
Node position distribution, figureFileSmall=1avO4jPiD1zigXps2iSDDw==, figureFileBig=+VHluz66/YkOqmT2SeC64g==, tableContent=null), ArticleFig(id=1241029739121537346, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图2, caption=
节点位置分布, figureFileSmall=1avO4jPiD1zigXps2iSDDw==, figureFileBig=+VHluz66/YkOqmT2SeC64g==, tableContent=null), ArticleFig(id=1241029739192840519, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.3, caption=
Stress and displacement nephogram of the box before optimization, figureFileSmall=UrzsynaNk7GOFdaMwhaMlQ==, figureFileBig=v5n3o4cu3T+PwA9meb6h2w==, tableContent=null), ArticleFig(id=1241029739268337999, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图3, caption=
优化前箱体应力、位移云图, figureFileSmall=UrzsynaNk7GOFdaMwhaMlQ==, figureFileBig=v5n3o4cu3T+PwA9meb6h2w==, tableContent=null), ArticleFig(id=1241029739343835474, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.4, caption=
First four-order natural frequencies and mode shapes of the box, figureFileSmall=IU+PGa+876cJyqqb8cWsEw==, figureFileBig=DtlvE5dDTKE/G6iMgT6hiA==, tableContent=null), ArticleFig(id=1241029739431915864, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图4, caption=
箱体前4阶固有频率振型, figureFileSmall=IU+PGa+876cJyqqb8cWsEw==, figureFileBig=DtlvE5dDTKE/G6iMgT6hiA==, tableContent=null), ArticleFig(id=1241029739503219033, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.5, caption=
Four-node displacement magnitude response and modal flexibility, figureFileSmall=ZwewyCrRjcg/bucVZfN79g==, figureFileBig=DjW7KOYHXCHdsQdw9MOGyA==, tableContent=null), ArticleFig(id=1241029739591299424, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图5, caption=
4节点位移幅值响应及模态柔度, figureFileSmall=ZwewyCrRjcg/bucVZfN79g==, figureFileBig=DjW7KOYHXCHdsQdw9MOGyA==, tableContent=null), ArticleFig(id=1241029739691962726, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.6, caption=
Multi-objective optimization structure diagram, figureFileSmall=1QakYn7RwxW15q+RpAtflA==, figureFileBig=1eI/Yp54R2vStpJS54nt1w==, tableContent=null), ArticleFig(id=1241029739792626029, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图6, caption=
多目标优化结构图, figureFileSmall=1QakYn7RwxW15q+RpAtflA==, figureFileBig=1eI/Yp54R2vStpJS54nt1w==, tableContent=null), ArticleFig(id=1241029739889095031, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.7, caption=
Box finite element model, figureFileSmall=G6uJtzPNH2u2ZmOa5kUIoA==, figureFileBig=ieP/hcB+D1Lmb+4qp6THnA==, tableContent=null), ArticleFig(id=1241029741390655873, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图7, caption=
箱体有限元模型, figureFileSmall=G6uJtzPNH2u2ZmOa5kUIoA==, figureFileBig=ieP/hcB+D1Lmb+4qp6THnA==, tableContent=null), ArticleFig(id=1241029741491319175, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.8, caption=
Topology optimization results, figureFileSmall=LoKS7sstqdV5Oh8x0FKlUw==, figureFileBig=AkKCKoE0XUGoSm/Yt1AC3g==, tableContent=null), ArticleFig(id=1241029741587788173, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图8, caption=
拓扑优化结果, figureFileSmall=LoKS7sstqdV5Oh8x0FKlUw==, figureFileBig=AkKCKoE0XUGoSm/Yt1AC3g==, tableContent=null), ArticleFig(id=1241029741688451476, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.9, caption=
Iteration curves of three weighting methods, figureFileSmall=PzVeB5RfLbdzmTQP6OLfjw==, figureFileBig=aKvvzbjsXLy8Q0iT0suMtQ==, tableContent=null), ArticleFig(id=1241029741768143257, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图9, caption=
3种权重赋权法迭代曲线, figureFileSmall=PzVeB5RfLbdzmTQP6OLfjw==, figureFileBig=aKvvzbjsXLy8Q0iT0suMtQ==, tableContent=null), ArticleFig(id=1241029741868806560, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.10, caption=
Optimized box, figureFileSmall=+kdSiVCabMaOysrHnGV43g==, figureFileBig=0Sd+21uFJeTDsjqk/N4wgA==, tableContent=null), ArticleFig(id=1241029741948498342, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图10, caption=
优化后箱体, figureFileSmall=+kdSiVCabMaOysrHnGV43g==, figureFileBig=0Sd+21uFJeTDsjqk/N4wgA==, tableContent=null), ArticleFig(id=1241029742116270509, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Fig.11, caption=
Static and dynamic analysis of optimized box, figureFileSmall=shHv2fS3rhdwI7Z5MyTLXg==, figureFileBig=r3lerbLOCYAPaACqI4g+3g==, tableContent=null), ArticleFig(id=1241029742200156596, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=图11, caption=
优化后箱体静动态分析, figureFileSmall=shHv2fS3rhdwI7Z5MyTLXg==, figureFileBig=r3lerbLOCYAPaACqI4g+3g==, tableContent=null), ArticleFig(id=1241029742338568629, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Tab.1, caption=
Main parameters of gearbox
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 传动比Transmission ratio | 23.8 |
| 输入转速Input speed n/(r/min) | 3 000 |
| 输出转矩Output torque T/(N·m) | 40.0 |
| 输入功率Input power W/kW | 0.6 |
| 上端盖材料Material for upper cover | 铸铝Cast aluminium |
| 下端盖材料Material for lower cover | 42CrMo钢 42CrMo steel |
| 螺栓材料Bolt material | 45钢 45 steel |
铸铝屈服强度 Yield strength of cast aluminum Re/MPa | 210.0 |
42CrMo钢屈服强度 Yield strength of 42CrMo steel Re/MPa | 930.0 |
), ArticleFig(id=1241029742435037627, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=表1, caption=
齿轮箱主要参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 Parameter | 值 Value |
|---|
| 传动比Transmission ratio | 23.8 |
| 输入转速Input speed n/(r/min) | 3 000 |
| 输出转矩Output torque T/(N·m) | 40.0 |
| 输入功率Input power W/kW | 0.6 |
| 上端盖材料Material for upper cover | 铸铝Cast aluminium |
| 下端盖材料Material for lower cover | 42CrMo钢 42CrMo steel |
| 螺栓材料Bolt material | 45钢 45 steel |
铸铝屈服强度 Yield strength of cast aluminum Re/MPa | 210.0 |
42CrMo钢屈服强度 Yield strength of 42CrMo steel Re/MPa | 930.0 |
), ArticleFig(id=1241029742518923712, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Tab.2, caption=
Material parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
参数 Parameter | 42CrMo钢 42CrMo steel | 铸铝 Cast aluminum | 45钢 45 steel |
|---|
| 密度Density ρ/(g/cm3) | 7.85 | 2.80 | 7.85 |
弹性模量 Modulus of elasticity E/GPa | 212 | 70 | 206 |
| 泊松比 Poisson ratio ν | 0.28 | 0.33 | 0.27 |
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材料参数
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参数 Parameter | 42CrMo钢 42CrMo steel | 铸铝 Cast aluminum | 45钢 45 steel |
|---|
| 密度Density ρ/(g/cm3) | 7.85 | 2.80 | 7.85 |
弹性模量 Modulus of elasticity E/GPa | 212 | 70 | 206 |
| 泊松比 Poisson ratio ν | 0.28 | 0.33 | 0.27 |
), ArticleFig(id=1241029742707667401, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Tab.3, caption=
Forces and moments of nodes
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节点 Node | 力Force/N | 力矩 Moment of force/(N∙m) |
|---|
| X | Y | Z |
|---|
| 1 | 1.0 | 2.5 | 0 |
| 2 | -1.1 | 4.9 | -38.3 |
| 3 | 0 | 0.8 | 0 |
| 4 | -0.4 | 6.4 | 0 |
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节点受力和力矩
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节点 Node | 力Force/N | 力矩 Moment of force/(N∙m) |
|---|
| X | Y | Z |
|---|
| 1 | 1.0 | 2.5 | 0 |
| 2 | -1.1 | 4.9 | -38.3 |
| 3 | 0 | 0.8 | 0 |
| 4 | -0.4 | 6.4 | 0 |
), ArticleFig(id=1241029742904799701, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Tab.4, caption=
First four-order natural frequencies and mode shapes of the box before optimization
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阶数 Order | 固有频率 Natural frequency/Hz | 振型特征 Mode shape characteristic |
|---|
| 1 | 657.4 | 上端盖沿X轴左右摆动 Top cover swings left and right along the X-axis |
| 2 | 660.2 | 上端盖沿Y轴左右摆动 Top cover swings left and right along the Y-axis |
| 3 | 800.7 | 上端盖沿Z轴旋转 Top cover rotates along the Z-axis |
| 4 | 3 290.2 | 上下端盖沿Z轴上下跳动 Top and bottom covers jump up and down along the Z-axis |
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优化前箱体前4阶固有频率、振型
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阶数 Order | 固有频率 Natural frequency/Hz | 振型特征 Mode shape characteristic |
|---|
| 1 | 657.4 | 上端盖沿X轴左右摆动 Top cover swings left and right along the X-axis |
| 2 | 660.2 | 上端盖沿Y轴左右摆动 Top cover swings left and right along the Y-axis |
| 3 | 800.7 | 上端盖沿Z轴旋转 Top cover rotates along the Z-axis |
| 4 | 3 290.2 | 上下端盖沿Z轴上下跳动 Top and bottom covers jump up and down along the Z-axis |
), ArticleFig(id=1241029743097737700, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Tab.5, caption=
Numerical value of single target topology optimization index
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指标 Index | 第1阶频率 1st order frequency/Hz | 第2阶频率 2nd order frequency/Hz | 第3阶频率 3rd order frequency/Hz | 第4阶频率 4th order frequency/Hz | 柔度 Flexibility |
|---|
指标1 Index 1 | 555.7 | 556.3 | 695.4 | 935.0 | 22.857 2 |
指标2 Index 2 | 872.1 | 875.2 | 1 087.0 | 1 093.6 | 16.917 7 |
指标3 Index 3 | 869.7 | 889.9 | 1 091.3 | 1 094.6 | 17.153 6 |
指标4 Index 4 | 871.0 | 871.0 | 1 089.1 | 1 144.1 | 16.962 1 |
指标5 Index 5 | 715.8 | 729.8 | 921.8 | 2 436.7 | 16.683 3 |
母序列 Mother sequence | 872.1 | 889.9 | 1091.3 | 935.0 | 16.683 3 |
关联度 Correlation | 0.19 | 0.20 | 0.10 | 0.16 | 0.35 |
), ArticleFig(id=1241029743190012394, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=表5, caption=
单目标拓扑优化指标数值
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指标 Index | 第1阶频率 1st order frequency/Hz | 第2阶频率 2nd order frequency/Hz | 第3阶频率 3rd order frequency/Hz | 第4阶频率 4th order frequency/Hz | 柔度 Flexibility |
|---|
指标1 Index 1 | 555.7 | 556.3 | 695.4 | 935.0 | 22.857 2 |
指标2 Index 2 | 872.1 | 875.2 | 1 087.0 | 1 093.6 | 16.917 7 |
指标3 Index 3 | 869.7 | 889.9 | 1 091.3 | 1 094.6 | 17.153 6 |
指标4 Index 4 | 871.0 | 871.0 | 1 089.1 | 1 144.1 | 16.962 1 |
指标5 Index 5 | 715.8 | 729.8 | 921.8 | 2 436.7 | 16.683 3 |
母序列 Mother sequence | 872.1 | 889.9 | 1091.3 | 935.0 | 16.683 3 |
关联度 Correlation | 0.19 | 0.20 | 0.10 | 0.16 | 0.35 |
), ArticleFig(id=1241029743282287086, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Tab.6, caption=
Weight values of three weighting methods for index
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方法 Method | 指标1 Index 1 | 指标2 Index 2 | 指标3 Index 3 | 指标4 Index 4 | 指标5 Index 5 |
|---|
| 层次分析法AHP | 0.46 | 0.07 | 0.08 | 0.17 | 0.22 |
灰色关联法 Grey correlation method | 0.16 | 0.19 | 0.20 | 0.10 | 0.35 |
组合赋权法 Combination weighting method | 0.37 | 0.16 | 0.10 | 0.10 | 0.27 |
), ArticleFig(id=1241029743391338996, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=表6, caption=
3种赋权法指标权重值
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方法 Method | 指标1 Index 1 | 指标2 Index 2 | 指标3 Index 3 | 指标4 Index 4 | 指标5 Index 5 |
|---|
| 层次分析法AHP | 0.46 | 0.07 | 0.08 | 0.17 | 0.22 |
灰色关联法 Grey correlation method | 0.16 | 0.19 | 0.20 | 0.10 | 0.35 |
组合赋权法 Combination weighting method | 0.37 | 0.16 | 0.10 | 0.10 | 0.27 |
), ArticleFig(id=1241029743466836473, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Tab.7, caption=
First four-order natural frequencies of optimized box
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| 阶数 Order | 固有频率 Natural frequency/Hz |
|---|
| 1 | 696.3 |
| 2 | 700.6 |
| 3 | 873.9 |
| 4 | 3 571.7 |
), ArticleFig(id=1241029743533945341, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=表7, caption=
优化后箱体前4阶固有频率
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| 阶数 Order | 固有频率 Natural frequency/Hz |
|---|
| 1 | 696.3 |
| 2 | 700.6 |
| 3 | 873.9 |
| 4 | 3 571.7 |
), ArticleFig(id=1241029743731077637, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=EN, label=Tab.8, caption=
Comparison of mass and static and dynamic characteristics of box before and after optimization
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指标 Index | 优化前 Before optimization | 优化后 After optimization | 变化量 Variation/% |
|---|
| 质量 Mass/g | 1 433.8 | 1 272.6 | 11.2 |
应力 Stress/MPa | 4.8 | 2.9 | 39.6 |
位移 Displacement/μm | 56.5 | 53.6 | 5.1 |
位移响应 Displacement response/μm | 0.29 | 0.05 | 82.8 |
第1阶频率 1st-order frequency/Hz | 657.4 | 696.3 | 5.9 |
第2阶频率 2nd-order frequency/Hz | 660.2 | 700.6 | 6.1 |
第3阶频率 3rd-order frequency/Hz | 800.7 | 873.9 | 9.1 |
第4阶频率 4th-order frequency/Hz | 3 290.2 | 3 571.7 | 8.6 |
), ArticleFig(id=1241029743861101070, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241029726702203643, language=CN, label=表8, caption=
箱体优化前后质量和静动态特性对比
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指标 Index | 优化前 Before optimization | 优化后 After optimization | 变化量 Variation/% |
|---|
| 质量 Mass/g | 1 433.8 | 1 272.6 | 11.2 |
应力 Stress/MPa | 4.8 | 2.9 | 39.6 |
位移 Displacement/μm | 56.5 | 53.6 | 5.1 |
位移响应 Displacement response/μm | 0.29 | 0.05 | 82.8 |
第1阶频率 1st-order frequency/Hz | 657.4 | 696.3 | 5.9 |
第2阶频率 2nd-order frequency/Hz | 660.2 | 700.6 | 6.1 |
第3阶频率 3rd-order frequency/Hz | 800.7 | 873.9 | 9.1 |
第4阶频率 4th-order frequency/Hz | 3 290.2 | 3 571.7 | 8.6 |
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