Except the centralized load impressed from plane other components and airload, the plane gun bay structure is also endured the wallop of the navigate gun launching.

在飞机飞行过程中，炮舱结构除承受飞机其它零件递的集中载荷和空气气动载荷外，还要承受航炮发射的冲击力，整个结构始终处于不规则的振动状态。

In Chapter 3, based upon the blade second-order lifting-line model and rotor free-wake model, an analytical method is developed for predicting the rotor wake structure and BVI airload.

基于阶升力线理论和旋翼自由尾迹模型，本文在第三章建立了一个适合于直升机旋翼尾迹结构及-涡干扰气动特性分析的方法和模型。