基于SPH方法的叶片鸟撞数值模拟研究  

NUMERICAL SIMULATION STUDY OF BIRD-IMPACT ON A BLADE USING SPH METHOD

作　　者：刘军[1] 李玉龙[1] 刘元镛[1] 

机构地区：[1]西北工业大学航空学院航空结构工程系,西安710072

出　　处：《振动与冲击》2008年第9期90-93,共4页Journal of Vibration and Shock

基　　金：国防科技工业民用专项科研技术研究项目资助

摘　　要：基于显式碰撞动力分析软件PAM-CRASH及其提供的SPH方法,建立了鸟撞平板叶片数值分析模型。通过SPH方法、Lagrange方法结果和实验结果三者对比,指出SPH方法比Lagrange方法的数值计算结果更贴近试验结果。还应用SPH方法,研究了圆柱体、两端带半球的圆柱体、椭球体三种不同几何构型的鸟体对计算结果的影响。最后,计算了实验条件下易出现损伤的叶片根部不同时刻的应变分布及应力分布。A numerical simulation of bird-impact on a blade is studied. A new smoothed particle hydrodynamics (SPH) approach which is incorporated as a solver option into the explicit finite element program PAM-CRASH is used to model the bird. The comparison among the results from SPH method, Lagrange method and experiment indicates that the result from SPH method is better in agreement with the experimental results than that from Lagrange method. Further, the SPH method is applied to study the influence of the geometric configuration of the bird model including cylinder, cylinder with a hemisphere or an ellipsoid at both ends on the numerical results. Finally, the distribution curves at different instants of strain and stress in the root of the blade where damage is easy to occur under experimental conditions are calculated.

关 键 词：数值模拟 鸟撞 SPH 叶片 

分 类 号：O346.1[理学—固体力学]