摘要
针对目前含金属橡胶的双层隔振系统简谐激励响应算法推导过程复杂、求解困难的现状,提出了基于多项式动态模型的等效线性化方法。首先引入多项式模型对金属橡胶的动态力学特性进行了描述,并对不同频率下隔振系统运动方程中的非线性刚度、阻尼进行等效线性化处理,然后求解方程获得系统在相应频率下的振幅,最后由不同频率的振幅组成幅频特性曲线。通过算例,将利用上述方法得到的结果与试验数据进行了对比,证明了多项式模型等效线性化方法对于含金属橡胶的双层隔振系统简谐激励响应计算问题的适用性、简便性和准确性。
According to the present of sine-wave response algorithm for two-stage isolation system with metal rubber is too complicated,the paper provides a method of equivalent linearization based on polynomial model.First polynomial model is used to describe the dynamic mechanical for metal rubber.And the equivalent linear processing of the non-linear rigidity and damping coefficient for motion equation have done which is in isolation system with different frequency.And then,equation is solved to get the amplitude with the corresponding frequency.Finally,drawing characteristic is curved by the amplitude-frequency character.The results compared with IHB iteration prove that the method is more accurate,and the process of deduction is easier.Such a conclusion may be advantageously used in guiding the practical engineering.
出处
《现代机械》
2010年第3期22-24,共3页
Modern Machinery
关键词
非线性振动
金属橡胶
多项式模型
双层隔振
nonlinear vibration
metal-rubber
polynomial model
two-stage isolation system
