飞机壁板结构的动特性分析与计算

本文以“修正的变分方法”为基础推导了一种新的飞机壁板结构动力分析方法.该法不需要将结构理想化或离散化而直接对复杂的飞机壁板结构进行特征分析或响应分析,方法的实质是将一个复杂结构划分为一个参考结构和一些附加结构,而把这些附加结构视为作用在该参考结构上的广义力,这些广义力由系统能量的变分求得.同时,本文还将有限条法与各向异性壳法相结合,发展了新的有限条分析方法.文中通过固有频率的计算,对这种方法的计算精度和应用场合等问题进行了讨论.

ANALYSIS AND COMPUTATION FOR THE DYNAMIC PERFORMANCE OF AIRCRAFT PANELS

Based on "modified variational method", a new dynamic analysis approach of aircraft panels has been derived in this paper. The dynamic analysis of complicated aircraft panels can conveniently be done with few simplification or without separating by this method. The crux of the method is that a complicated struoture can be taken as a "reference structure" and several "additive structures" of which the effects are taken as generalized forces acted on the reference structure. These generalized forces can be abtained from the variation of the system energy. Meanwhile, a new finite strip analytical method has also been developed by combining X-direction finite strip analysis with orthotropic shell theory in this paper. Through the computation of structural natural frequencies, the computing accuracy and the application conditions of these two methods have also been discussed.