微分求积法分析二维亚音速壁板的失稳问题  

INSTABILITY ANALYSIS OF TWO-DIMENSIONAL THIN PANELS IN SUBSONIC FLOW WITH DIFFERENTIAL QUADRATURE METHOD

作　　者：李鹏[1] 杨翊仁[1] 鲁丽[1] 

机构地区：[1]西南交通大学力学与工程学院,成都610031

出　　处：《动力学与控制学报》2012年第1期11-14,共4页Journal of Dynamics and Control

基　　金：国家自然科学基金资助项目(10972185);中央高校基本科研业务费专项资金资助项目(2010Z707)~~

摘　　要：采用微分求积方法(简称DQ方法)研究了亚音速气流中二维壁板的失稳问题.运用特征值方法分析了壁板在不同边界条件下的失稳特性.结果表明:本方法可有效确定系统的失稳;两端简支和两端固支的壁板出现了发散失稳而未出现颤振失稳;固支—弹性支承的壁板系统出现了颤振失稳,颤振失稳动压与系统参数相关.The instability of a two-dimensional thin panel in subsonic flow was studied by using Differential Quadrature method （DQ method） . The eigenvalue numeric method was used to study the instability characteristics of panels with differential boundary conditions. The results show： 1） that the critical parameters can be efficiently obtained by DQ method; 2） that panel which is fixed at both ends undergoes divergence; 3） that the clamped-spring support panel flutters; 4） and that the critical flutter dynamic pressure is influenced by some system parameters.

关 键 词：亚音速流 微分求积法 壁板 发散 颤振 

分 类 号：O354.1[理学—流体力学]