【摘要】 根据转动壳体的动力学方程 ,在利用DMAP对大型有限元软件MSC/NASTRAN二次开发的基础上 ,采用有限元方法对复合材料层合壳体转动状态下的动力特性进行了研究 ,分析了科氏力、离心力和横向剪力对固有频率的影响 ,并与实验结果进行了比较 .结果显示由于科氏力的作用 ,即使在动坐标系下 ,层合壳体也会出现频率不等的前后行波 ,横向剪力使壳体的固有频率降低 ,且随着壳体厚径比的增加其影响显著增加更多还原

【Abstract】 In the dynamic analysis of drum-type composite rotor, not only the dynamic behavior of rotor system but also the vibration characteristic of drum-type composite rotor should be studied. By reprogramming the finite element analysis software MSC/NASTRAN using DMAP program, the dynamic characteristic of rotating laminated composite shell and the influences of coriolis, centrifugal and transverse shearing forces on nature frequencies were investigated and compared with experimental results. It indicated that coriolis, centrifugal and transverse shearing forces have great influences on the vibration modes of rotating shell. The results also indicated that there exist forward and backward traveling waves even in the rotating coordinate system because of the effects coriolis force.更多还原