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Rotordynamic analysis of systems with a non-linear model of tilting pad bearings including turbulence effects

机译：具有包括湍流效应的可倾瓦轴承非线性模型的系统的转子动力学分析

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An analytical model of a tilting pad bearing was developed based on the short bearing assumption with the turbulence effect included. In order to determine its influence on the dynamic behavior of the rotor, this model was compared against one without the turbulence effect through a simulation of a Jeffcott/Laval rotor supported by a couple of bearings. Both models were also used to determine the influence of geometric parameters on tilting pad bearing making use of the aforementioned system at different rotor speeds. When analyzing the results, the parameters which presented the largest influence were: pad preload, number of segments, radial clearance, pad position, and pad pivoting angle. As the pad moment of inertia and the pivoting distance have changed the shaft motion only a few microns, their effects can be neglected. The bearing model with turbulent flow effect has generated higher hydrodynamic forces when compared to the one without this effect, which remarks the importance of considering such phenomenon during the analysis of the high speed hydrodynamic bearings.
机译：基于短轴承假设并包括湍流效应，开发了可倾瓦轴承的分析模型。为了确定其对转子动态性能的影响，通过对由两个轴承支撑的Jeffcott / Laval转子的仿真，将该模型与没有湍流效应的模型进行了比较。这两个模型还用于确定几何参数对摆瓦轴承的影响，这些摆瓦轴承利用上述系统在不同的转子转速下使用。分析结果时，影响最大的参数是：垫板预紧力，节段数，径向游隙，垫板位置和垫板枢转角度。由于轴瓦的惯性矩和枢转距离仅改变了轴运动几微米，因此可以忽略它们的影响。与没有湍流效应的轴承模型相比，具有湍流效应的轴承模型产生了更高的流体动力，这表明在分析高速流体轴承时考虑这种现象的重要性。

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