CAJ | 학술논문

基于有限差分法，利用轴承已知外力和宽径比直接求解完整二维流动雷诺方程，得出油膜压力、油膜刚度、油膜阻尼等参数，避免了传统方法中的查表法以及选取扰动量造成的误差。针对某一轴承-转子系统进行稳定性分析，得到其临界失稳转速。结果表明：随着转速的增大，偏心率会逐渐减小，偏位角会逐渐增大，失稳转速逐渐减小；在保证全油膜的条件下，适当增大偏心率，可以增加轴承-转子系统的稳定性。
기우유한차분법，이용축승이지외력화관경비직접구해완정이유류동뢰낙방정，득출유막압력、유막강도、유막조니등삼수，피면료전통방법중적사표법이급선취우동량조성적오차。침대모일축승-전자계통진행은정성분석，득도기림계실은전속。결과표명：수착전속적증대，편심솔회축점감소，편위각회축점증대，실은전속축점감소；재보증전유막적조건하，괄당증대편심솔，가이증가축승-전자계통적은정성。
Two-dimensional flow Reynolds equation for the bearing with given load and width-radius ratio was directly solved based on the finite difference method,avoiding the error caused by the traditional methods of look-up table and se-lecting disturbance volume.The oil film pressure,film stiffness and film damper of the bearing were got,the stability for a bearing-rotor system was analyzed,and its critical instability speed was got.The results show that,with the increasing of speed,the eccentricity is gradually reduced,the deviation angle is gradually increased,and the instability speed is gradual-ly reduced.Under conditions to ensure the whole of the oil film,the stability of the bearing-rotor system can be improved by increasing the eccentricity properly.