柔性转子的优化平衡

OPTIMUM BALANCING OF FLEXIBLE ROTOR

本文提出一种柔性转子优化平衡准则—有约束的最小应变能准则,它能满足航空燃气涡轮发动机结构强度和性能一体化设计的要求。应用该准则时,平衡校正量(大小和方位)是优化参数,转子—支承系统的总应变能为目标函数;转子若干截面的振动幅值作为约束条件。选用了鲍威尔法和网格随机射线法,进行优化计算。编制了优化全过程的FORTRAN程序,并经算例和实验考核、验证。

A new criterion for optimum balancing of a flexible rotor is introduced, which is the minimum rotor strain energy criterion with constrains. This criterion meets the requirements for integral design of structure strength and performance of a gas turbine aeroengine. In this criterion the balance correction masses (quantity and orientation) are the optimum design variable, the objective function of optimization is the total strain energy of the rotor and its supports. The response amplitudes at several cross-section along the rotor are taken as its constraints. The Powell's method and the net random-ray method are chosen as optimum methods. A program is written with FORTRAN 77 for the whole optimization procedure. The program has been testified by a numerical example in comparison with its experiments.