论文部分内容阅读
基于非结构网格开发了静气动弹性计算程序,通过气动力与弹性变形的交替迭代计算实现流固耦合。气动力求解采用RANS方程,结构变形计算采用柔度系数法,通过面样条(IPS)方法进行柔度系数插值,使用改进弹簧近似法实现网格变形。通过对AGARD 445.6机翼的静气弹计算验证了方法的正确性,同时对机翼的静气动弹性特性进行了分析,计算表明,弹性变形使其升力线斜率下降、焦点前移。
Based on the unstructured grid, a static-dynamic elasticity calculation program was developed and the fluid-structure interaction was achieved by alternating iterative calculation of aerodynamic forces and elastic deformation. The aerodynamic solution uses the RANS equation, the structural deformation calculation uses the flexibility coefficient method, the compliance coefficient (IPS) method to interpolate the flexibility coefficient, and the modified spring approximation method to realize the grid deformation. The correctness of the method is verified by the calculation of the static gas bomb of the AGARD 445.6 wing, and the static-dynamic elastic characteristics of the wing are analyzed. The results show that the elastic deformation decreases the slope of the lift line and shifts the focus forward.