智能复合材料机翼的气动弹性剪裁

Aeroelastic Tailoring of Intelligent-composite Wing

通过含有位移和电自由度的四节点板元,利用哈密尔顿原理,推导了含有压电传感器和作动器的智能复合材料机翼的机电耦合动力学方程。采用西奥道生非定常气动理论结合片条理论构建气动力模型,获得机翼的颤振方程,并利用v-g法分析了复合材料的铺层方式和反馈增益对颤振速度的影响。结果表明:复合材料的铺设方式和反馈增益系数是在相互影响下改变机翼颤振速度的。

Based on a four-node composite plate element with displacement and electrical degrees of freedom, the electromechanical coupled dynamic equations are derived by using the Hamilton＇s principle for the intelligentcomposite wing with piezoelectric sensors and piezoelectric actuators. The Theodorsen＇s unsteady aerodynamic theory and the strip theory are used to describe the aerodynamic model, then the flutter equations are obtained, and the flutter speed are calculated at various feedback coefficient and ply angle by the v-g method. The numerical results show that the flutter speed varied under the interactional of the feedback coefficient and the ply angle.