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设计气体动压轴承时,需知其频率特性。目前最有名的是基于窄槽理论的方法。但在槽数较少,例如6至15槽时,其正确性由于端部和边缘效应而受到影响。也有若干作者建议了有限差分和有限单元法。但前者需要很密的网格,后者现仅有计算静载荷和静刚度的方法。本文提出了一个计算带螺旋槽气体动压轴承静态和摄动频率特性的高次、等参有限元方法。它可以比已有的有限差分及有限单元法大大减少所需的储存单元和计算机时。
Design gas dynamic pressure bearings, the need to know the frequency characteristics. The most famous is based on the narrow groove theory. However, when the number of slots is small, for example, slots 6 to 15, its correctness is affected by the effects of the edges and edges. Several authors have also proposed finite difference and finite element methods. However, the former requires a very dense grid, and the latter only now has a method of calculating static load and static stiffness. In this paper, a high-order, isoparametric finite element method for calculating the static and perturbed frequency characteristics of helical grooved hydrodynamic bearings is presented. It can significantly reduce the required storage unit and computer when compared to the existing Finite Difference and Finite Element methods.