考虑剪切变形的复杂刚架结构动力学特性分析  

Dynamics Characteristic Analysis of Complex Rigid Frame Structure Considering Shear Deformation

作　　者：鄂林仲阳 刘春川[1] 李凤明[1,3] 

机构地区：[1]哈尔滨工业大学,哈尔滨150001 [2]中国工程物理研究院总体工程研究所,绵阳621900 [3]北京工业大学,北京100124

出　　处：《中国机械工程》2014年第14期1922-1925,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(11172084;50935002)

摘　　要：采用谱元法计算分析了复杂刚架结构的动力学响应特性,建立了直杆和Timoshenko梁的局部动力刚度阵,并组装得到了整体刚架结构的动力刚度阵。计算了刚架结构的频响曲线,并与有限元法得到的结果进行了比较,获得了刚架的固有频率和冲击载荷作用下的频域曲线。研究结果表明,谱元法可有效且准确地分析刚架结构的动力学响应特性,尤其适合中高频动态响应特性分析,与有限元方法相比,其精度高且用时短。A spectral element method was used to analyze dynamics response characteristics of the complex rigid frame structure .The local dynamic stiffness matrices of straight bar and Timoshenko beam could be established ,and the global dynamic stiffness matrix of the frame structures could be obtained .Comparing frame harmonic response based on spectral element method and finite element method ,and calculating the natural frequencies and frequency domain results under impact load fur-ther ,it show s that the spectral element method can be used effectively and accurately to analyze the dynamic response characteristics of complex frame structures ,especially for the high frequency re-sponses ,and the precision and efficiency are high compared with the finite element method .

关 键 词：谱元法 刚架结构 Timoshenko梁模型 动力学响应 

分 类 号：TH113[机械工程—机械设计及理论]