The dynamic performances of floating-ring bearing with hydrodynamic/hydrostatic gas lubrication are studied theoretically and some calculated charts of dynamic coefficients are given in the paper. The method of stabil...The dynamic performances of floating-ring bearing with hydrodynamic/hydrostatic gas lubrication are studied theoretically and some calculated charts of dynamic coefficients are given in the paper. The method of stability analysis is also presented and it is proved that the high speed stability of such bearings is better than other types of gas bearings.展开更多
目前,国内部分地铁设计速度已达120 km/ h,有必要针对该速度条件下的减振垫浮置板动力特性以及减振垫刚度取值等问题展开专门研究。基于有限元软件,建立车辆-轨道-隧道耦合动力学模型,可对120 km/ h 速度条件下地铁车辆、钢轨、减振垫...目前,国内部分地铁设计速度已达120 km/ h,有必要针对该速度条件下的减振垫浮置板动力特性以及减振垫刚度取值等问题展开专门研究。基于有限元软件,建立车辆-轨道-隧道耦合动力学模型,可对120 km/ h 速度条件下地铁车辆、钢轨、减振垫浮置板,以及隧道结构等细部结构的动力学特性进行详细的研究。经计算和检算可知,在减振垫浮置板上运行120 km/ h 速度的地铁 A 型车,其各项动力学指标均满足动力学检算标准；同时计算结果表明,减振垫面刚度宜取0.01-0.02 N/ mm3.展开更多
文摘The dynamic performances of floating-ring bearing with hydrodynamic/hydrostatic gas lubrication are studied theoretically and some calculated charts of dynamic coefficients are given in the paper. The method of stability analysis is also presented and it is proved that the high speed stability of such bearings is better than other types of gas bearings.
文摘目前,国内部分地铁设计速度已达120 km/ h,有必要针对该速度条件下的减振垫浮置板动力特性以及减振垫刚度取值等问题展开专门研究。基于有限元软件,建立车辆-轨道-隧道耦合动力学模型,可对120 km/ h 速度条件下地铁车辆、钢轨、减振垫浮置板,以及隧道结构等细部结构的动力学特性进行详细的研究。经计算和检算可知,在减振垫浮置板上运行120 km/ h 速度的地铁 A 型车,其各项动力学指标均满足动力学检算标准；同时计算结果表明,减振垫面刚度宜取0.01-0.02 N/ mm3.
