摘要
本文获得了中轻载及重载工况下粗糙表面间的等温部分弹流线接触问题的完全数值解,求得了在有表面粗糙影响的条件下,线接触润滑的流体动压力和粗糙度接触压力、油膜厚度以及接触载荷,并且研究了粗糙度及其纹理方向对线接触弹流润滑中的接触载荷、中心膜厚、最小膜厚以及二次压力峰的大小和位置的影响,同时也研究了部分弹流润滑条件下,各种工况参数变化对润滑性态的影响。
Up till now, most numerical solutions to Partial Elastohydrodynamic Lub-rication (PEHL) problems are limited to light and moderate loads [2-4]. Therecent paper by Sadeghi et al [7] applied the Newton-Raphson method to studying the compressible elastohydrodynamical lubrication problem of rough surfacesand gave numerical results for comparatively heavy loads up to and includingmaximum dimensionless load parameter W=2.3×10^(-4). Nevertheless, the load isstill lower than those encountered in nonconformal machine elements employedin industry. In order to satisfy industrial need for higher loads, the present paper, star-ting from the authors' previous study [5], develops a new calculation model ofPEHL. The Newton-Raphson iteration approach is also used in the currentstudy. It is well known that in PEHL calculations, with increasing load, boththe difficulty in attaining a convergent solution and the time of iteration requ-ired increase very rapidly. The authors overcome these difficulties by applyingmathematical techniques-gradient method and variable relaxation factor. Theiteration speed is faster than that of Ref. [7] at the same relative error (Theconvergent result for W=10×10^(-4) in this paper is obtaned by iterating 20 times,but that for W=2.3×10^(-4) in Ref. [7] is obtained by iterating 40 times). Theconvergent solution obtained in this paper at W=10×10^(-4) is believed to be theresult for the heavist load so far published.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1990年第2期150-158,共9页
Journal of Northwestern Polytechnical University
关键词
润滑
弹性流体
线接触
粗糙度
elastohydrodynamics
lubrication
roughness.
