采用分层理论计算层合板的固有频率和振型

摘要

采用有限元方法并结合分层理论对复合材料层合板的固有频率和振型进行理论计算，再用实验验证。通过分层有限元模型求解层合板的位移模式，对层合板固有频率进行计算。分析有限元网格数，铺设角度、铺设层数等对固有频率的影响，获得层合板自由振动的前九阶振型，采用实验进行了验证。结果表明，提出的方法可较精确计算层合板的固有频率和振型。%A detailed simulation of natural frequencies and mode shapes of laminated composite plates is presented based on the layerwise theory and the corresponding finite element method. The influence of finite element mesh size, fiber orientation, ply number, etc. on the natural frequencies of a laminated plate is analyzed. And its natural frequencies of the first 9 orders are obtained. The simulation result is verified by the experiment. Consequently, the applicability and the effectiveness of the present method for accurately computing the natural frequencies of laminated composite plates are demonstrated.