层合阻尼结构各向异性设计之阻尼特性分析  

ANISOTROPIC DESIGN AND ITS DAMPING ANALYSIS OF LAMINATED DAMPED STRUCTURE

作　　者：李明俊[1] 苏媛[2] 孙向春[2] 万诗贵[1] 曹义华[2] 

机构地区：[1]南昌航空工业学院环境与化学工程系,江西南昌330034 [2]北京航空航天大学飞行器设计与应用力学系,北京100083

出　　处：《复合材料学报》2002年第3期94-97,共4页Acta Materiae Compositae Sinica

基　　金：中国航空科学基金资助项目 (98B5 60 0 6)

摘　　要：将各向异性设计引入层合阻尼结构中 ,从理论上分析了各向异性层合阻尼结构的阻尼特性及其控制机理 ,从而验证了建立约束阻尼层合结构各向异性优化设计新体系的可行性。文中衡量结构阻尼减振效果的重要指标是结构系统的损耗因子 ,采用半无限简支板为例 ,对各种铺层形式作了大量的计算 ;并以最大损耗因子为目标函数 ,以铺层角度、频率、厚度等为约束条件进行结构优化设计。分析研究表明 ,该结构内部柔性层对阻尼的影响要比应力耦合对其影响大得多 ;在高于基本模式的固有频率下 。An anisotropic design is introduced to the laminated damped plates. The damping characteristic and its control mechanism of laminated anisotropic damped plates were analysed theoretically. The results indicate that it is feasible to carry out the optimization design of laminated anisotropic damped plates for obtaining the maximum loss factor. An important index for evaluating the effect of reducing vibration decrease is the loss factor of the structure system. Taking a semi-infinite plate as an example, a lot of composite structures were calculated by varying different layers and layer orientation angles. At the same time, after the loss factor was defined as the objective function, the optimization design was carried out for obtaining the maximum loss factor with constrained conditions such as the layer angle, frequency and layer thickness. The numerical results show that using compliant inner layering appears to have more effects on damping than using stress coupling, and in the inherent frequency higher than the fundamental mode, the compliant inner layering laminates have significantly greater loss factors.

关 键 词：层合阻尼结构 各向异性 设计 阻尼特性 损耗因子 复合材料 结构力学 

分 类 号：TB33[一般工业技术—材料科学与工程] TB301