规则横向条纹形貌参数对动压润滑的影响

o analyze the effect of surface roughness on the journal bearing lubrication, three parameters such as amplitude, wavelength and duty cycle are used to specify characteristics of the regular transverse surface roughness. In the lubrication of infinite width journal bearing, analytic solutions of pressure distribution with the effect of three roughness parameters are derived. In finite width journal bearing lubrication, the effects of roughness parameters to the load capacity are given by numerical method. The numerical results are concordance with the analytic solutions. The load capacity increases as the roughness amplitude increases and it is better to select the amplitude range from 1% bearing clearance to 1/5 roughness wavelength. The load capacity increases as the wavelength decreases, but its increment is decreasing. The load capacity is also direct proportion to the duty cycle.