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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一种改进的动态载荷时域识别方法 |
An improved method of dynamic load identification in time domain |
修订日期:2002-08-02 |
DOI:10.7511/jslx20042039 |
中文关键词: 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 |
英文关键词:dynamic,load identification,time domain,proportional damping system,recursive |
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. |
张运良 林皋 王永学 李志军 李广伟 |
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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中文摘要: |
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。 |
英文摘要: |
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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