考虑夹具的车门刚度特性分析及误差研究

中国机械工程

考虑夹具的车门刚度特性分析及误差研究

宋凯1;胡金花1;高晖2;石少亮1

1.湖南大学汽车车身先进设计制造国家重点实验室，长沙，410082
2.湖南湖大艾盛汽车技术开发有限公司，长沙，410082

出版日期:2018-01-25 发布日期:2018-01-22
基金资助:
国家自然科学基金资助项目（51605155）；
湖南省科技开发计划资助项目（2013TT1006）
National Natural Science Foundation of China （No. 51605155）
Hunan Provincial S&T Development Program（No. 2013TT1006）

Door System Stiffness and Error Analysis Considering Fixtures

SONG Kai1;HU Jinhua1;GAO Hui2;SHI Shaoliang1

1.State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha,410082
2.Hunan Huda Aisheng Automotive Technological Development Co.,Ltd.,Changsha，410082

Online:2018-01-25 Published:2018-01-22
Supported by:
National Natural Science Foundation of China （No. 51605155）
Hunan Provincial S&T Development Program（No. 2013TT1006）

摘要/Abstract

摘要： 针对有限元仿真与试验测试存在预测精度不高、偏差较大等问题，提出了一种考虑夹具的车门刚度特性分析方法。利用极限误差合成理论，对试验数据采集误差、柔性变形误差进行耦合，建立了试验误差模型；根据不同工位夹具，提出了基于灵敏度分析的误差影响权重确定方法，推导出仿真误差模型的一般表达式；结果表明，夹具对试验与仿真的偏差影响较大。最后，以某车门实例验证了误差模型的准确性。

关键词: 试验误差模型, 仿真误差模型, 夹具, 误差合成, 灵敏性分析

Abstract: As prediction accuracy was not high, and deviations were large for finite element simulations and tests, a new door stiffness analysis method was proposed, which considered test fixtures. Using theory of limit error synthesis, experimental error model was established by coupling test data collection errors and flexible deformation errors. A method was gave based on sensitivity analysis to calculate importances of error effects considering different station fixtures, and the common form of simulation error transfer model was deducted. Finally, results show that the fixture has a great influence on deviations between tests and simulations，and verifies accuracy of the error model in an example of a car door.

Key words: experimental error model, simulation error model, fixture, error synthesis, sensitivity analysis

中图分类号:

宋凯1;胡金花1;高晖2;石少亮1. 考虑夹具的车门刚度特性分析及误差研究[J]. 中国机械工程.

SONG Kai1;HU Jinhua1;GAO Hui2;SHI Shaoliang1. Door System Stiffness and Error Analysis Considering Fixtures[J]. China Mechanical Engineering.

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