减振结构刚度特性对随机振动响应的影响  

Effect of Rigidity of Damping Structure on Random Vibration Responses

作　　者：陈颖[1] 朱长春[1] 王雄祥[1] 周德惠[1] 

机构地区：[1]中国工程物理研究院结构力学研究所,四川绵阳621900

出　　处：《西南交通大学学报》2002年第B11期26-29,共4页Journal of Southwest Jiaotong University

摘　　要：对典型的减振结构建立等效的质量 刚度集中参数模型 ,推导在基础随机激励下该模型的振动响应谱解析公式 ,并对它们在不同刚度参数下的振动响应变化特点进行了分析。通过分析可知 :在质量和阻尼一定的情况下 ,减振结构的刚度越小 ,对高频的过滤作用越明显 ;无论系统或减振结构刚度如何变化 ,其位移响应谱总均方根值主要都集中在低频段 ,因此对于需严格控制线位移或角位移的系统 。An equivalent mass rigidity concentration model is set up for a damping structure. Analytical formulae of vibration response spectrum under base random excitation are deduced. The vibration response characteristic under different rigidities is analyzed. When the mass and damping parameters are constant, the smaller the rigidity of the damping structure is, the better the high frequency filtering function is. However, the mean square root value of displacement is mainly in the low frequency range, no matter how rigidity of the damping structure changes. For a system the displacement of which needs to be carefully controlled, low frequency damping should be emphasized.

关 键 词：减振结构 刚度特性 随机振动 振动响应谱 质量-刚度集中参数模型 减振设计 

分 类 号：O327[理学—一般力学与力学基础]