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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >FREQUENCY EFFECTS ON LINEAR STIFFNESS AND DAMPING COEFFICIENTS OF TILTING-PAD JOURNAL BEARINGS
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FREQUENCY EFFECTS ON LINEAR STIFFNESS AND DAMPING COEFFICIENTS OF TILTING-PAD JOURNAL BEARINGS

机译：倾角垫轴承线性刚度和阻尼系数的频率效应

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摘要

This paper presents experimental and theoretical results obtained for a TPJB of a diameter of 3.875 in operating at shaft speeds of up to 15,000 rpm and subjected to multifrequency excitation. The analysis of the results indicates that pad inertia forces and pivot flexibility can be behind variations of both stiffness and damping linear coefficients of the TPJBs. The excitation frequency effects are more pronounced for lightly loaded bearings. In particular, under some operating condition a drastic decrease in damping capabilities has been observed. The results have also shown that excitation frequency does not affect the cross coupling coefficients. The experimental study is supplemented by uncertainty analysis. The uncertainties of measurements have been estimated from an analysis of error propagation when using frequency domain techniques.
机译：本文介绍了直径为3.875的TPJB在最高15,000 rpm的轴转速下运行并经受多频激励的实验和理论结果。结果分析表明，垫板惯性力和枢轴柔韧性可能落后于TPJB刚度和阻尼线性系数的变化。轻载轴承的激励频率效应更为明显。特别地，在某些操作条件下，已经观察到阻尼能力的急剧降低。结果还表明，激励频率不影响交叉耦合系数。实验研究辅以不确定性分析。当使用频域技术时，已经通过对误差传播的分析来估计测量的不确定性。

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