| 自由-自由运行体系动态载荷反演问题研究 |
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| 引用本文： | 毛玉明,郭杏林,赵岩,朱礼文,潘忠文.自由-自由运行体系动态载荷反演问题研究[J].计算力学学报,2010,27(1):35-39. |
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| 作者姓名： | 毛玉明 郭杏林 赵岩 朱礼文 潘忠文 |
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| 作者单位： | 1. 大连理工大学工业装备结构分析国家重点实验室,大连,116023
2. 北京宇航系统工程研究所,北京,100076 |
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| 基金项目： | 国家自然科学基金(50608012)资助项目 |
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| 摘 要： | 对自由-自由运行体系动态载荷识别问题进行深入研究,将自由-自由运行体系振动积分方程时域离散化,建立了体系动态载荷反演的力学模型。在动态载荷反演模型求解过程中,由于结构矩阵的病态特性以及测量噪声的影响,常规最小二乘法往往失效;通过对载荷反演模型进行奇异值分解,指出该病态问题的本质,并提出相应的正则化求解方法。数值仿真表明了本文方法能够得到满足工程要求的稳定近似解。本文研究对于实际飞行器运行过程所受动载荷评估具有一定的意义。
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| 关 键 词： | 载荷识别 不适定问题 反演问题 奇异值分解 正则化技术 |
| 收稿时间： | 2008/9/27 0:00:00 |
Study of dynamic force identification for free-free structural system |
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| MAO Yu-ming,GUO Xing-lin,ZHAO Yan,ZHU Li-wen and PAN Zhong-wen.Study of dynamic force identification for free-free structural system[J].Chinese Journal of Computational Mechanics,2010,27(1):35-39. |
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| Authors: | MAO Yu-ming GUO Xing-lin ZHAO Yan ZHU Li-wen and PAN Zhong-wen |
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| Institution: | 1.State Key Laboratory of Structural Analysis for Industry Equipment/a>;Dalian University of Technology/a>;Dalian 116023/a>;China/a>;2.Beijing Institute of Aerospace Systems Engineering/a>;Beijing 100076/a>;China |
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| Abstract: | A discrete formulation of force identification method in time domain is proposed,which is mainly for reconstructing the dynamics force applied on free-free structural system.The inverse problem of force identification is always ill-posed due to the inverse process of structural matrix and measurement noise in practical engineering and the ordinary least square method always obtains the meaningless solution.This paper further discloses the essence of ill-posedness of force identification problem in detail th... |
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| Keywords: | force identification ill-posed problem inverse problem singular valued decomposition regularization technique |
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