【摘要】 针对用振型分解法对耗能减震结构进行反应分析中存在的计算精度差且耗时的问题,提出了求解振动方程特征值问题的改进一阶摄动的高精度模态展开法,并推导了强行解耦的振型分解的一阶摄动修正公式。最后通过算例证明,提出的摄动分析法是有效的。更多还原

【Abstract】 The conventional methods of numerical modal analysis for vibrating structure, in the case of energy dissipation system, are usually of low precision and time concsuming. A modal expansion method of high precision based on improved first order pertubation analysis is put forward to solve the eigenprolem of vibrating stracture. The proper expressions of the first order pertubation analysis is put forw ard to solve the eigenproblem of vibrating stracture. The proper expressions of the first order pertubation are also deduced to resolve the force coupled vibration. Examples show the real effectiveness of the method presented.更多还原