离心载荷作用下平板叶片鸟撞击响应计算

NUMERICAL ANALYSIS OF BLADE TRANSIENT RESPONSES TO BIRD IMPACT UNDER CENTRIFUGAL LOADINGS

在航空发动机工作状态下发生叶片鸟撞击时，由于离心载荷的作用，使叶片的局部刚度与整体刚度都得到加强，此时的叶片响应不同于不计算离心载荷时静止叶片的响应。本文采用有限元法，计算分析了不同离心载荷的作用下的叶片鸟撞击瞬态响应。计算结果表明，离心载荷的大小对叶片瞬态响应中叶片的局部变形。

The integrative rigidity and the local rigidity of blades are enhanced by their centrifugal loading,so that when a flying bird impacts on the aeroengine blades under their rotating states,the responses of the blades are different from those under the static states.The nonlinear transient responses of the blades to the bird impact under the different centrifugal loadings are analyzed by using the finite element method.The results show that the centrifugal loadings have a significant effect on the local and integrative deformations of the blades as well as the character of the responses.