国家自然科学基金资助项目(10272002)和教育部博士点基金资助项目(20020001032)．
为分析一类含间隙结构的振动特性及为保护特定子结构而预留间隙的合理性，根据其振动试验结果，采用假设模态法的思想，将该类带间隙的非线性结构按其子结构的一阶弯曲模态简化为带间隙的单自由度与二自由度弹簧质量系统，分析了不同激励条件下间隙对系统动力学响应的影响.分析结果表明：此类结构中，间隙具有阻碍振动传递的性质，预留间隙是合理的.
For analyzing the vibration characteristics of a kind of structure with clearances,and for discussing the rationality of prekeeping clearances in protecting the special substructure, we reduce the nonlinear structure with clearances to 1DOF system with clearances and 2DOF system with clearances,by adopting the mass and the firstorder bending stiffness of its substructures on the basis of Assumption Modal Method and its vibration results. We analyze the effect of the clearness on the response of the system under different exciting conditions. The results indicate that the clearances can hold back the transfer of the vibration and it is rational to prekeep the clearances in the system.
肖世富,陈滨,杜强,莫军.一类含间隙结构振动特性分析[J].动力学与控制学报,2003,1(1):35~40; Xiao Shifu, Chen Bin, Du Qiang, Mo Jun. Vibration characteristics of the structure with clearances[J]. Journal of Dynamics and Control,2003,1(1):35-40.
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