基于灵敏度分析的结构动态载荷识别研究

毛玉明;郭杏林;赵 岩;吕洪彬

振动与冲击 ›› 2010, Vol. 29 ›› Issue (10) : 1-3.

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PDF(2265 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (10) : 1-3.
论文

基于灵敏度分析的结构动态载荷识别研究

  • 毛玉明; 郭杏林; 赵 岩; 吕洪彬
作者信息 +

Study of force identification based on sensitivity analysis method

  • MAO Yuming; GUO Xinglin; ZhAO Yan; LV Hongbin
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摘要

对结构动态载荷反演问题进行深入研究,提出了一种基于灵敏度分析法的结构动态载荷识别时域分析技术。将结构输入动态载荷表示为一系列参数的形式,通过灵敏度迭代分析来确定相应的载荷参数,从而确定结构的动态输入载荷。在灵敏度迭代求解过程中,为减少响应测量噪声引起的影响,引入正则化求解技术来寻求满足工程要求的稳定近似解。最后提出的方法成功应用于正弦级数迭加形式的输入载荷识别,仿真结果表明灵敏度分析法在载荷识别中是有效的。




Abstract

Abstract: A novel force identification method is proposed for reconstructing the time history of input force from the dynamic response. The proposed scheme is based on sensitivity analysis method, where the input force is expressed as a series of parameters, and the sensitivities of dynamic response with respect to these parameters of input force are calculated in time domain, and then the sensitivities are used to update the parameters of input force iteratively in the inverse analysis. Furthermore, the inverse analysis is ill-posed, and the regularization technique is utilized to alleviate the fluctuations caused by measurement noise in dynamic response. Finally, the proposed method is successfully applied to identify the input force modeled in a generalized form of a sine series in numerical simulation.

关键词

结构动力学 / 灵敏度分析 / 载荷识别 / 反演问题

Key words

Structural dynamics / Sensitivity Analysis / Force identification / Inverse problem.

引用本文

导出引用
毛玉明;郭杏林;赵 岩;吕洪彬 . 基于灵敏度分析的结构动态载荷识别研究[J]. 振动与冲击, 2010, 29(10): 1-3
MAO Yuming;GUO Xinglin;ZhAO Yan;LV Hongbin. Study of force identification based on sensitivity analysis method[J]. Journal of Vibration and Shock, 2010, 29(10): 1-3

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