转子热弯曲变形及其影响的数值分析方法

研究了转子热弯曲及其对振动影响的数值分析方法。采用三维有限元法计算轴的温度场及热弯曲变形，或采用一阶振型分配法估算轴的热弯曲变形，采用传递矩阵法计算热弯曲振动响应，计算结果与有关理论解吻合良好。这些方法在热弯曲试验器分析中得到了验证。本文提出的数值分析方法可以用于实际发动机转子热弯曲及其影响的分析

Numerical Analysis Method of Thermal Deflection and its Affection on Vibration Response of Rotor

In this paper, a numerical analysis method of rotor′s thermal deflection and its affection on vibration response is studied. In the method, three dimensional FEM is used to compute the temperature field and thermal bending deformation of rotor, or a first order vibration mode distribution procedure is adopted to estimate the thermal bending deformation of rotor. A transfer matrix method is also employed to compute thermal bending vibration response. The results obtained from this paper fit well with theoretical and experimental ones. The numerical method presented here can be applied to the analyses of thermal deflection and its affection on vibration response of a real rotor.