CAJ | 학술논문

基于热气动弹性的特点，给出考虑温度影响的机翼热颤振有限元分析的一般理论。采用Nastran软件对给定的温度分布热效应下两个典型的高超音速机翼的模态特性和气动弹性稳定性进行有限元分析。计算结果表明，受热结构的模态特性和颤振特性均发生变化。由于温度效应降低弯曲、扭转及弯扭固有频率，还会改变它们之间的相对关系，从而导致颤振临界速度极大地减小。
기우열기동탄성적특점，급출고필온도영향적궤익열전진유한원분석적일반이론。채용Nastran연건대급정적온도분포열효응하량개전형적고초음속궤익적모태특성화기동탄성은정성진행유한원분석。계산결과표명，수열결구적모태특성화전진특성균발생변화。유우온도효응강저만곡、뉴전급만뉴고유빈솔，환회개변타문지간적상대관계，종이도치전진림계속도겁대지감소。
Based on the characteristics of aero-thermoelasticity, a hierarchical solution process for thermal flutter analysis is presented. Using Nastran software, the natural dynamic characteristic and aero-thermoelasticity of two typical hypersonic wing structures are analyzed involving thermal effect of the given temperature distribution. The results illustrate that both the natural dynamics and the flut- ter characteristics of wings change due to aerodynamic heating. The flutter velocity declines sharply because the high temperature not only makes the first three natural frequencies of structure descend but also changes the difference.of the natural frequencies.