| 基于最小修正量法的振系物理参数识别方法 |
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| 引用本文： | 张立民,张卫华,段合朋.基于最小修正量法的振系物理参数识别方法[J].交通运输工程学报,2009,9(3). |
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| 作者姓名： | 张立民 张卫华 段合朋 |
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| 作者单位： | 西南交通大学,牵引动力国家重点实验室,四川,成都,610031
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| 基金项目： | "十一五"国家科技支撑计划项目，牵引动力国家重点实验室自由探索自主研究课题 |
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| 摘 要： | 在分析振型矩阵关于质量和刚度矩阵加权正交性的基础上,利用振动频率和振型数据识别系统物理参数的最小修正量,借助Lagrange乘子法,求解约束条件下的质量与刚度矩阵误差加权范数为最小的优化问题,提出了以实测模态参数为基准的振系物理参数识别的计算方法,推导了完整和非完整2种试验模态参数情形下的物理参数识别计算表达式,给出了迭代算法,并对4自由度系统进行了模态试验及数值分析.分析结果表明:刚度矩阵和质量矩阵与真值非常接近,最大误差分别为0.086%和0.34%,因此,提出的方法具有很高的可靠性.
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| 关 键 词： | 车辆工程 物理参数识别 模态分析 计算方法 机械振动 迭代计算 |
Physical parameter identification method of vibration system based on minimum correction value method |
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| ZHANG Li-min,ZHANG Wei-hua,DUAN He-peng.Physical parameter identification method of vibration system based on minimum correction value method[J].Journal of Traffic and Transportation Engineering,2009,9(3). |
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| Authors: | ZHANG Li-min ZHANG Wei-hua DUAN He-peng |
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| Institution: | Traction Power State Key Laboratory;Southwest Jiaotong University;Chengdu 610031;Sichuan;China |
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| Abstract: | Based on the orthogonality of the vibration modal matrix with respect to the mass and stiffness matrices for vibration system,the minimum correction values of physical parameters for vibration system were identified by vibration frequency and model.The optimization problem of vibration system with restrictions was solved by Lagrange multipler.A physical parameter identification method was proposed based on measured modal data.The formulae of physical parameter identification for holonomic and nonholonomic m... |
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| Keywords: | vehicle engineering physical parameter identification modal analysis computational method mechanical vibration iterative calculation |
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