复合材料转动壳体动力特性分析  

Dynamic characteristic analysis of rotating composite shell

作　　者：史亚杰[1] 洪杰[1] 吴炜[2] 

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100083 [2]中国科学院力学研究所,北京100080

出　　处：《北京航空航天大学学报》2004年第1期31-35,共5页Journal of Beijing University of Aeronautics and Astronautics

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 。In the dynamic analysis of drum-type composite rotor, not only the dynamic behavior of rotor system but also the vibration characteristics of rotor should be studied. By reprogramming the finite element analysis software MSC/NASTRAN using DMAP program, the dynamic characteristics of rotating laminated composite shell and the influences of Coriolis force, centrifugal force and transverse shear force on natural frequencies were investigated and compared with the experimental results. It indicated that those forces have great influences on the vibration modes of rotating shell. There are forward and backward traveling waves even in the rotating coordinate system because of the Coriolis force.

关 键 词：复合材料 有限元 动力特性 层合壳体 鼓式转子 

分 类 号：V214.3[航空宇航科学与技术—航空宇航推进理论与工程]