| 基于polyMAX的白车身锤击实验模态及灵敏度分析 |
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| 引用本文： | 刘成武,钱林方,洪亮.基于polyMAX的白车身锤击实验模态及灵敏度分析[J].福建建筑高等专科学校学报,2013(4):359-363,372. |
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| 作者姓名： | 刘成武 钱林方 洪亮 |
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| 作者单位： | [1]福建工程学院机械与汽车工程学院,福建福州350118 [2]南京理工大学机械工程学院,江苏南京210094 |
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| 基金项目： | 国家863计划项目（2012AAllll05）;福建省科技计划重点项目（2013H0001）;福州市科技计划项目（2011-PT-128）;福州市科技计划项目（2012-G-108） |
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| 摘 要： | 针对传统模态分析方法的缺陷，采用polyMAX方法对某轿车白车身进行脉冲锤击法模态试验研究。首先建立白车身结构的测试系统模型，采用polyMAX方法进行试验模态特性分析，计算模态参数MAC值，并基此对车身结构进行灵敏分析。结果表明，模态测试系统满足精度要求：参数辩识结果有效可靠，结构参数的变化对车身结构的动态特性有较大影响，主要在于结构的质量和阻尼变化。
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| 关 键 词： | 白车身 polyMAX方法 模态试验 参数辨识 灵敏度分析 |
Modal hammering test and sensitivity analysis of vehicle body-in- white based on polyMAX method |
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| Liu Chengwu,Qian Linfang,Hong Liang.Modal hammering test and sensitivity analysis of vehicle body-in- white based on polyMAX method[J].Journal of Fujian College of Architecture & C.E.,2013(4):359-363,372. |
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| Authors: | Liu Chengwu Qian Linfang Hong Liang |
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| Affiliation: | 1. School of Mechanical and Automative Engineering, Fujian University of Technology, Fuzhou 350118, China ; 2. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China) |
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| Abstract: | To overcome the defects of classical modal parameter estimation approach, a modal test of an automobile body-in-white （BIW） was conducted via polyMAX impulse hammering method. An experimental model of BIW was established to conduct the modal test. The modal parameters MAC were computed. The sensitivity of the BIW was analysed. The test results show that the modal tes- ting system can meet the requirement of precision with reliable results of parameter identification, that the change of the structural parameters affects the dynamic characteristics of the body structure, i.e. the quality and the damping of the structure |
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| Keywords: | body-in-white （BIW） polyMAX method modal experiment parameters identification sensitivity analysis |
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