基于流固耦合的叶片动力特性分析  

Dynamic Characteristic Analysis of Blade Based on Fluid-Structure Coupling

作　　者：周忠宁[1] 李意民[1] 谷勇霞[2] 谢远森[1] 孙婉[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221008 [2]北京工商大学机械自动化学院,北京102488

出　　处：《中国矿业大学学报》2009年第3期401-405,共5页Journal of China University of Mining & Technology

基　　金：江苏省自然科学基金项目(BK2005018);江苏省研究生科研创新计划项目(CX07B-061Z)

摘　　要：在考虑耦合流场与旋转预应力条件下,建立了对应的叶片流固耦合系统的动力特性方程.采用ANSYS与FLUENT对整体叶片的耦合模态进行了计算,并利用实验获得气流压力脉动数据,对叶片振动进行了瞬态分析.结果表明:在旋转预应力与耦合流场压力作用下,叶片模态频率约有9 Hz的上升,模态振型的最大位移位置点转移,振动方向改变,前三阶相对振幅分别从29.128,19.400,44.566下降到28.945,19.285,44.562;叶片最大变形和加速度位于前缘的上端,最大应力点集中在叶片根部一侧.The dynamic characteristic equations of blade fluid-structure coupling system were established by considering the rotation stress and coupling-flow. The fluid-structure coupling blade modal were calculated using ANSYS and FLUENT. The transient analysis of blade vibration, which based on airflow pressure pulsation data from experiments was completed. The results show that the modal frequency increased about 9 Hz. The largest displacement location of vibration mode transferred and the direction of vibration changed. The relative amplitude decreased from 29. 128, 19. 400, 44. 566 to 28. 945, 19. 285, 44. 562, respectively. The largest deformation and acceleration were at the top of the blade leading edge, and the maximum stress points were at one side of the blade roots.

关 键 词：应力刚化 流固耦合 叶片模态 瞬态分析 

分 类 号：O342[理学—固体力学]