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| Numerical calculation method of dynamic characteristics of journal bearing |
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LI Qiang1, XU Weiwei2, WANG Zhenbo1, JIN Youhai1, ZHENG Shuiying3
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(1.College of Chemical Engineering in China University of Petroleum, Qingdao 266580, China;2.College of Transport & Storage and Civil Engineering in China University of Petroleum, Qingdao 266580, China;3.Institute of Chemical Machinery, Zhejiang University, Hangzhou 310027, China)
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| Abstract: |
| The computational fluid dynamics (CFD) and harmonic excitation method were applied to the numerical calculation of dynamic characteristics of journal bearing. By employing a new mesh movement approach based on structured grid, a new approach for calculating the dynamic characteristics of journal bearing was proposed based on the transient flow calculation. The stiffness and damping coefficients of a typical bearing were calculated by applying the new approach. The results obtained from the method were compared with previous classic computation results. The results show that the computation results of two methods are consistent. The effects of the computational initial value and the oil film fracture phenomenon are considered in this method, which is suitable for most of the journal bearing structures. The numerical method has good accuracy, and the method is valid. |
| Key words: journal bearing computational fluid dynamic (CFD) dynamic coefficient dynamic mesh numerical calculation |
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