基于流固耦合的风电机组预应力模态分析  

Pre-stress Modal Analysis of Wind Turbines Under Fluid-structure Interaction

作　　者：张文文[1] 薛惠芳[1] 

机构地区：[1]南京工业大学,江苏南京211800

出　　处：《机械制造与自动化》2014年第3期183-185,共3页Machine Building & Automation

摘　　要：以某大型风力发电机组为例,考虑了叶片旋转气动力和风机流固耦合效应,利用ANSYS Workbench有限元分析软件对风力发电机组进行预应力模态分析。对风力发电机组外围流场进行CFD分析,获得叶片旋转气动力和机身流固耦合作用下的压力值,以压力值作为输入载荷进行静力分析,进而转换为预应力条件下的模态分析。结果表明在风机叶轮旋转气动力和机身流固耦合作用下,风电机组的模态有较为显著的改变。Taking a pleavy wind driven generator as an example and considering the rotation of blade load and fluidstructure coupling effect,this paper uses the finite element software ANSYS Workbench to conduct prestress modal analysis of the wind driven generators. Firstly the pressure of flow field is obtained under the effect of blade wheel load and fluidstructure coupling and by CFD analysis for its outflow field,then the static structural analysis is conducted and the data is transtered to the modal analysis under the prestress. The results indicate both modal frequency and mode of vibration are changed under the condition fluidstructure coupling apparently.

关 键 词：风力发电机组 流固耦合 预应力 模态分析 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]