减小转子共振敏感性的结构设计方法初探

汽轮机工业发展的要求和转子动力学的进展,使现代汽轮机设计师开始有必要研究如何设计出振动性能更好的汽轮机,以便在突然产生不平衡等情况下仍保证机组安全,或者甚至在临界转速区也能安全运行的设计方法.本文通过一种简单的模型以及一系列不平衡响应计算来分析转子结构因素对共振特性的影响,从而提出从设计上减小转子共振对不平衡量的敏感性的若干方法.

THE MEANS OF REDUCING RESONANT SENSITIVITY FOR ROTOR STRUCTURE DESIGN

The present paper analyses the resonant sensitivity to unbalance of rotors. The effects of rotor structure, particulaly of the rotor stiffness and mass distribution on the resonant sensitivity are studied by the approximate modal analysis and the unbalance response calculations. Some means of reducing the rotor resonant sensitivity for turbomachinery design are proposed.