ANALYSIS OF STRUCTURAL DYNAMIC RESPONSE ON EARTHQUAKE LOAD WITH RANDOM DAMPING
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摘要: 讨论了结构系统阻尼的随机性,建立了运动微分方程。运用二阶摄动法对随机阻尼在地震荷载作用下结构的动力响应进行了计算,给出随机阻尼对结构响应影响的数值表达式。结果表明,随机阻尼对结构的动力反应的影响的确存在,特别是阻尼变化率较大时对结构的动力响应影响更为明显,应引起结构设计者的足够重视。Abstract: Random characteristic of structural damping is discussed. A kinetic differential equation is set up. The effects of damping variability on the seismic response of structural systems are examined with a second- order perturbation method. It is shown that damping uncertainty shouldnct be ignored.
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Key words:
- perturbation method /
- structural damping /
- variance /
- dynamic response
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