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机械工程学报

机械工程学报 ›› 2015, Vol. 51 ›› Issue (14): 93-99.doi: 10.3901/JME.2015.14.093

• 运载工程 • 上一篇    下一篇

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整车室内道路模拟试验用载荷谱的编制方法研究

于佳伟1, 郑松林1,2, 赵礼辉1,2, 赵子顺3   

  1. 1.上海理工大学机械工程学院 上海 200093
    2.上海理工大学机械工业汽车底盘机械零部件强度与可靠性评价重点实验室 上海 200093
    3.浙江吉利汽车研究院有限公司 杭州 311228
  • 出版日期:2015-07-20 发布日期:2015-07-20

Research on Spectrum Development Methodology for Vehicle Indoor Road Simulation Test

YU Jiawei1, ZHENG Songlin1,2, ZHAO Lihui1,2, ZHAO Zishun3   

  1. 1.College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093
    2.Machinery Industry Key Laboratory for Mechanical Strength & Reliability Evaluation of Auto Chassis Components, University of Shanghai for Science and Technology, Shanghai 200093
    3.Zhejiang Geely Automobile Research Institute Co., Ltd., Hangzhou 311228
  • Online:2015-07-20 Published:2015-07-20
  • Supported by:
    国家自然科学基金(51275166)、湖南省战略性新型产业重大科技攻关 (2011GK4058)、湖南科技大学研究生创新基金(S130019，S140018)和湖南省高校产学研基金(11CY020)资助项目

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摘要： 室内道路模拟试验中，将试验场实测载荷谱编制成可行有效的试验用载荷谱是十分关键的。提出一套整车室内道路模拟试验用载荷谱的编制方法，包括试验场实测载荷谱的选取和试验用载荷谱的加速。对于试验场实测载荷谱的选取，传统方法大多基于载荷谱的损伤而选取中值损伤谱。从载荷谱的数值统计特征出发，提出一种基于各路段最小标准差谱组合的试验场实测载荷谱选取新方法，并阐述最小标准差组合谱(Concatenation of multi-sections minimum standard deviation spectra, CMSD)的构造方法与流程。以试验场实测载荷谱为基础构造出CMSD，损伤分析结果表明CMSD近似为均值损伤谱，具有一定的代表性。对于试验用载荷谱的加速，采用时域信号压缩的方法对CMSD进行加速处理，生成加速谱。以加速谱为目标谱进行整车耐久性试验，试验中出现了与汽车试验场一致的失效模式，验证了该套方法的可行性。该套方法可为其他车型的整车室内道路模拟试验用载荷谱的编制提供一定的参考。

关键词: 时域信号压缩, 室内道路模拟试验, 载荷谱选取, 最小标准差组合谱

Abstract: Generation of valid and effective test spectra from proving ground recorded loading spectra is critical in the indoor road simulation test. A set of spectrum development methodology is induced, which includes selection of proving ground recorded loading spectra and acceleration of durability test spectra. For the selection of loading spectra, traditional methods are mostly based on spectrum damage. Statistical characteristics of loading spectrum are taken into account, and a new selection methodology, which is based on concatenation of multi-sections minimum standard deviation spectrum(CMSD), is proposed. The generation method of CMSD is also illustrated. Based on proving ground recorded loading spectra, the CMSD is created. Fatigue damage analyses results have shown that CMSD is equal to mean damage spectra. For the acceleration of test spectrum, time domain signal compression method is applied to develop accelerated spectrum. The accelerated spectrum is applied as the target spectrum, and vehicle durability test is conducted. The fatigue models, which are the same as those of proving ground test, have occurred during the test. The validity of this set of methodology is verified, and it can be a reference for other vehicle indoor road simulation tests.

Key words: concatenation of multi-sections minimum standard deviation spectrum(CMSD), indoor road simulation test, selection of loading spectra, time domain signal compression

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