一种静、动气动弹性的一体化计算方法

An Integrated Algorithm Method for Static Elasticity and Flutter

用欧拉方程计算非定常气动力,在时域内求解结构运动方程。根据计算得到的广义坐标时间响应的特性来判断机翼在给定来流条件下是否发生了颤振或静发散。如广义坐标的时间响应是收敛的,则扰动消失后的机翼平衡位置即为最终的机翼静变形,同时也得到了考虑弹性影响的机翼气动特性。从而得出飞机的静、动弹性一体化计算结果,与传统计算方法结果的比较说明了本文方法的有效性。

Euler equations are applied to calculate the aerodynamic forces, when the time-domain method is used to solve structural motion equations. The calculated characteristics of the time response in generalized axes is used to identify flutter or divergence occurred in the wing. If the time response is convergent, the equilibrium position of the wing is defined as its final static deformation after initial disturbance disappears. At the same time, the aerodynamic characteristics of the wing is obtained. As a result, the numerical results in the mixture state of static elasticity and flutter are obtained. The method applied is validated by comparing the calculations with the conventional results.