超音速舵面热气动弹性仿真

为研究弹翼气动加热效应对结构气动弹性稳定性的影响,建立了热气动弹性仿真模型。根据分层求解的原理,首先采用平板参考温度法进行气动加热计算,进而分析热环境下结构的固有特性,并利用当地流活塞理论计算非定常气动力,在状态空间进行热颤振求解。对某弹性边界全动舵进行了超音速巡航段的热颤振特性分析;结果表明,随着时间的推移,热效应使舵面的固有频率逐渐降低,导致颤振边界下降;一段时间后,固有特性及热颤振特性趋于稳定。分析方法简捷有效,为飞行器结构设计提供了一种工程分析手段。

Aerothermoelastic Simulation of Supersonic Missile Rudder

To dealing with the effect of aerodynamic heating on the structural aeroelastic stability,a simulation method for aerothermoelastic analyses is presented.Based on the hierarchical solution process,panel reference temperature method is used to make engineering prediction of aerodynamic heating.Then,dynamic analysis of structure under thermal environment is performed;unsteady aerodynamic loads are calculated using local flow piston theory.Flutter equation is solved in state-space.Thermal flutter analysis of a...