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本文通过对二个φ450试验轴承的静、动特性计算与全尺寸大型滑动轴承试验台上的实测值进行比较分析,讨论了紊流因子对计算性能的影响;分析了影响动力特性计算精度的几个主要因素;找出了在理论依据基本一致的前提下,造成动特性计算结果差异的原因;指出了在紊流状态下,动特性系数的计算迭代是准确计算失稳转速理论值的主要关键,而紊流因子的不同选取并不是主要因素。在上述基础上,提出了在产品设计中以轴承动特性裕度较大为目标的紊流因子选择和计算过程中应完成的迭代要求。
In this paper, by comparing the static and dynamic characteristics of two φ450 test bearings with the measured values of the full-size large-scale plain bearing test bench, the influence of turbulence factors on the calculation performance is discussed. The influence of several factors on the calculation accuracy of dynamic characteristics It is pointed out that under the condition of turbulent flow, the calculation iteration of dynamic characteristic coefficient is the key to accurately calculate the theoretical value of buckling speed , While the different choice of turbulence factor is not the main factor. On the basis of the above, the paper presents the choice of turbulence factors and the iterative requirements to be fulfilled in the process of product design, which aim at the large margin of bearing dynamic characteristics.