结构动力学模型修正的一种参数型方法

罗漳平; 向锦武

结构动力学模型修正的一种参数型方法

北京航空航天大学航空科学与工程学院, 北京 100083

基金项目: 国家自然科学基金资助项目(10272012、19802001); 博士学科点专项科研基金资助项目(20010006001)

详细信息

作者简介:
罗漳平(1968-),男,贵州麻江人,博士生, luozhangping@163.com.

中图分类号: O 327; TB 123
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- 文章访问数: 3070
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- 被引次数: 0
出版历程
- 收稿日期: 2003-02-27
- 网络出版日期: 2004-07-31

Parametric correcting method for dynamic mathematical model via dynamical response

School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 从连续系统出发,利用应力-应变关系和惯性力公式推导出一种能量范数的本构关系误差公式,用它来构造结构动力学模型修正问题的数学模型;然后根据系统的稳态位移响应,通过一个迭代过程来求解.参数的估算与不完整的实验数据的扩充相互耦合,引入扰动项来反映参数的改变对扩充的影响.仿真算例对实验数据精确和有噪声2种情况进行了研究,结果表明方法合理、可行.
- 结构动力学 /
- 有限元 /
- 动力响应 /
- 模型修正 /
- 本构关系
Abstract: Improvement of structural dynamical model using dynamical response was studied. The approach is correcting physical parameters of given finite element model using experimental steady displacement responses. The mathematical model for model updating was constructed through the constitutive relations error which is an energy norm derived by stress-strain relationship and inertial force in a continuum system. The parameter estimation couples with expansion to uncompleted experimental data, and a perturbation item was introduced to account for the dependence of expansion data on the parameter variation. An optimum iterative process wasemployed to calculate corrected parameters. Numerical example illustrates the presented method to be effective and valid for estimating physical parameters.
- structural dynamics /
- finite element method /
- dynamical response /
- model updating /
- constitutive relations

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参考文献(1)

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