【摘要】：本文主要實現(xiàn)了彈流油膜界面滑移現(xiàn)象的定量測量并以此為依據(jù)研究了往復(fù)運動條件下油膜的動態(tài)響應(yīng)特性。 改進了光彈流實驗臺的運動控制系統(tǒng)，即用VisualBasic語言對運動控制卡進行編程，實現(xiàn)了微尺度內(nèi)的高精度往復(fù)運動以及步進運動和多段運動等運動方式。滿足了實驗對于不同工況的需要。 理論計算了卷吸運動的初始時刻封油核心的壓力分布。用彈性變形矩陣和測得的油膜厚度求解油膜的壓力，，迭代得到收斂的壓力值，為分析壓力分布對界面滑移的影響做準備。 實驗研究了彈流接觸區(qū)內(nèi)油膜的界面滑移現(xiàn)象，通過追蹤封油核心的運動位移實現(xiàn)了滑移長度的定量測量。系統(tǒng)分析了壓力、初始封油深度、卷吸速度等不同因素對滑移長度的影響。 測量了界面滑移條件下往復(fù)運動彈流潤滑的油膜特征，實驗研究了載荷、振幅、頻率和界面條件等不同因素對往復(fù)動態(tài)彈流油膜的影響。特別地，當采用油/SiO2界面和鋼球微振幅往復(fù)運動條件下，沖擊油膜的封油核心的振動振幅明顯衰減，且發(fā)生半個周期的相差。
[Abstract]:In this paper, the quantitative measurement of the slip phenomenon at the interface of elastohydrodynamic oil film is carried out and the dynamic response of the oil film under reciprocating motion is studied. In this paper, the motion control system of the photoelastic fluid experiment bench is improved, that is, the motion control card is programmed with VisualBasic language, and the high precision reciprocating motion, step motion and multi-segment motion are realized in the micro-scale. The experimental results meet the needs of different working conditions. The pressure distribution of the oil sealing core at the initial stage of the entrainment motion is calculated theoretically. The pressure of oil film is calculated by using the elastic deformation matrix and the measured oil film thickness, and the convergent pressure value is obtained iteratively, so as to prepare for the analysis of the influence of pressure distribution on interfacial slip. The interfacial slip of oil film in elastohydrodynamic contact region is studied experimentally. The quantitative measurement of slip length is realized by tracking the moving displacement of the oil sealing core. The effects of pressure, initial oil sealing depth and entrainment speed on the slip length are systematically analyzed. The oil film characteristics of elastohydrodynamic lubrication in reciprocating motion under the condition of interfacial slip were measured. The effects of load amplitude frequency and interface conditions on the oil film of reciprocating dynamic elastohydrodynamic were investigated experimentally. In particular, under the conditions of oil / SiO2 interface and the reciprocating motion of steel ball micro-amplitude, the vibration amplitude of the oil sealing core of oil film impingement obviously attenuates, and the difference of half period occurs.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH117

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