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。
The conventional methods of numerical modal analysis for vibrating structure, in the case of energy dissipation system, are usually of low precision and time consuming. A modal expansion method of high precision based on improved first order perturbation analysis is put forward to solve the eigenproblem of vibrating structure. The proper expressions of the first order perturbation analysis is put forward to solve the eigenproblem of vibrating structure. The proper expressions of the first order perturbation are also deduced to resolve the force coupled vibration. Examples show the real effectiveness of the method presented.
出处
《振动与冲击》
EI
CSCD
北大核心
2005年第3期72-75,i007,共5页
Journal of Vibration and Shock
