摘要
依据动力学实验的结果,采用频域参数识别方法建立了金属橡胶的动力学模型。步骤为:建立应用金属橡胶减振器的单自由度系统,进行正弦扫描实验,得到幅频曲线;采用粘性阻尼三次非线性刚度模型,用谐波平衡法进行频域响应计算;通过模式搜索法寻找参数,使计算结果与实验得到的幅频曲线在最小二乘准则下最为接近,从而建立金属橡胶的参数化动力学模型。建模结果表明计算与实验得到的幅频曲线匹配良好。与引入双折线环节的模型进行对比,表明采用粘性阻尼模型已经可以较好地描述金属橡胶的频域特性。
A dynamic model of metallic rubbers was derived by identifying parameters in the frequency domain based on dynamic test.Firstly,an amplitude-frequency curve was obtained from the sine sweep test of a single degree system with a metallic rubber isolator.Then by assuming a viscous damping and cubic elastic model,the response in the frequency domain was computed by applying the harmonic balancing method.A set of parameters was found by pattern search approach to get the best approximation of the computed resul...
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2008年第2期499-504,共6页
Journal of Astronautics
关键词
金属橡胶
动力学模型
参数识别
Metallic rubber
Dynamic model
Parameter identification
