【摘要】 本文研究了偏置椭球方程,改变相关参数可得到不同尺寸和形状的后压力框,得到了一种偏置椭球冠状后压力框外形的确定方法。由某型飞机的尺寸相关要求确定后压力框的外形,采用有限元法对此种形式的后压力框进行内压作用下的应变分析以及外压作用下的稳定性分析,采用局部壳体稳定性分析的研究方法确定加筋基本方案,并对格栅加筋后的后压力框进行外压下稳定性分析,考虑不同加筋形式的影响,最终得出较优的格栅加筋结构方案。更多还原

【Abstract】 In this paper, the offset ellipsoid equation is studied, and the rear pressure bulkhead of different sizes and shapes can be obtained by changing the relevant parameters. A method for determining the shape of the rear pressure bulkhead is obtained. The shape of the rear pressure bulkhead is determined by the size requirements of a certain type of aircraft. The strain analysis under the internal pressure and the stability analysis under the external pressure are carried out by the finite element method. The stability of parts of the rear pressure bulkhead determines the basic scheme of reinforcement. This article also analyzes the stability of the rear pressure bulkhead after grid reinforcement, considering the influence of different reinforcement forms, and finally obtains a better grid reinforcement structure scheme.更多还原