多支点柔性转子系统临界转速稳健设计方法

A method for robust design using response surface method and tolerance model to consider the variation of the influencing factors of the rotor system was proposed. According to this method, response surface methodology was used to obtain the functional relationship between multi-parameters and multi-objectives, while the multi-order critical speed distribution was taken as the constraint condition, and the sensitivity of the critical speed to minimize the variation of the support stiffness was formulated for the design goal. This proposed method was applied to the critical speed distribution design of low-pressure rotor system of a small bypass ratio turbofan engine. In consideration of the variation of each support stiffness, the critical speed distribution of the flexible rotor system meets the given standards. Meanwhile, the sensitivity of the critical speed to the variation of the support stiffness is lowest, proving that this method is feasible and effective.