| 一种改进的动态载荷时域识别方法 |
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| 引用本文： | 张运良,林皋,王永学,李志军,李广伟.一种改进的动态载荷时域识别方法[J].计算力学学报,2004,21(2):209-215. |
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| 作者姓名： | 张运良 林皋 王永学 李志军 李广伟 |
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| 作者单位： | 大连理工大学,海岸和近海工程国家重点实验室,辽宁,大连,116023 |
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| 基金项目： | 国家杰出青年科学基金(59725919)，国家自然科学基金(50179003)资助项目. |
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| 摘 要： | 根据在离散时间间隔内未知外载荷按线性交化的这一更为合理的假定，给出了比例阻尼系统的一种改进的载荷时域识别方法。即若已知结构的任一种响应：位移、速度或加速度，根据本文推导出的递推连锁计算公武便可确定未知作用力的时程。算例表明，本方法简便、有效，且具有较强的抗噪能力。
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| 关 键 词： | 动态载荷 载荷识别 比例阻尼系统 离散时间间隔 识别原理 固有频率 工程力学 |
| 文章编号： | 1007-4708(2004)02-0209-07 |
| 修稿时间： | 2002年8月2日 |
An improved method of dynamic load identification in time domain |
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| Zhang Yunliang,LinGao,Wang Yongxue,Li Zhijun,Li Guangwei Dalian University of Technology,Dalian,China.An improved method of dynamic load identification in time domain[J].Chinese Journal of Computational Mechanics,2004,21(2):209-215. |
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| Authors: | Zhang Yunliang LinGao Wang Yongxue Li Zhijun Li Guangwei Dalian University of Technology Dalian China |
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| Institution: | Zhang Yunliang~,LinGao,Wang Yongxue,Li Zhijun,Li Guangwei Dalian University of Technology,Dalian,China |
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| Abstract: | Based on more reasonable assumption that unknown external forces vary linearly within the discrete time interval, an improved method for dynamic load identification for proportional damping system was presented. A set of concise recursive formulae for determining the values of these forces was derived, any one of structural response: displacement, velocity or acceleration needed only for the input. Practical examples showed that compared with other formulae given in recent literature, the proposed approach is simple, effective and has a strong anti-noise ability. |
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| Keywords: | dynamic load identification time domain proportional damping system recursive |
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