舰船艉管水润滑橡胶板条轴承与铜背衬的机械接触力学

doi:10.3969/j.issn.1000-1093.2015.12.022

摘要/Abstract

摘要： 基于对起伏和凹凸不平的表面微观几何学形貌统计分析，考查衡量微接触点的弹性和塑性变形区域，建立橡胶板条轴承与铜背衬接触的法向接触载荷、实际接触面积、弹性实际接触面积、塑性实际接触面积、橡胶塑性指数等的理论解。计算及分析结果表明：发生接触的突起期望数随着法向接触载荷的增加而增加，随着表观接触面积的增大而略微增加；橡胶板条轴承与铜背衬之间的间距随着法向接触载荷的增加而减小；在法向接触载荷一定时，橡胶板条轴承与铜背衬之间的间距随着表观接触面积的增大而增加；对于给定的表观接触面积，实际接触面积近乎恰恰与法向接触载荷呈正比，但不依赖于表观接触面积；平均实际接触压强随着法向接触载荷的增加而增加，随着表观接触面积的增加而减小；接触表面之间的接触电阻随着法向接触载荷的增加而降低；当橡胶塑性指数小于1.77或金属制品塑性指数小于0.6时，接触表面发生弹性变形；当橡胶塑性指数大于2.95或金属制品塑性指数大于1.0时，接触表面发生塑性变形。相关模型及仿真曲线图可为橡胶粗糙表面弹塑性接触的精确求解提供一定的理论基础。

关键词: 兵器科学与技术, 舰船艉管, 橡胶板条轴承, 铜背衬, 接触力学, 实际接触面积, 法向接触载荷, 橡胶塑性指数

Abstract: The theoretical solutions for normal contact load, real contact area, real elastic contact area, real plastic contact area and rubber plasticity index in the contact of rubber stave bearing and Cu backing are constructed by considering the elastic and plastic deformation zones of microcontacts based on statistical analysis of wiggly and jagged surface micro geometric morphology. The calculation and analytical results show that the expected number of contacts increases with the increase in normal contact load and increases slightly with the increase in apparent contact area. The separation between rubber stave bearing and Cu backing decreases with the increase in normal contact load, and gains with the increment of apparent contact area for a given normal contact load. For a given apparent contact area, the real contact area is almost exactly proportional to normal contact load but doesn’t depend on apparent contact area. The average real contact pressure is aggrandized with the augment of normal contact load and lessens with the increase in apparent contact area. The contact resistance between contact surfaces diminishes as the normal contact load increases. When the rubber plasticity index is less than 1.77 or metal plasticity index is less than 0.6, the elastic deformation is caused on contact surfaces. When the rubber plasticity index exceeds 2.95 or the metal plasticity index is larger than 1.0, the plastic deformation occurs on contact surface. The related model and simulation curves lay a theoretical foundation for the accurate solution of elastic and plastic contact about rubber harsh surface.

Key words: ordnance science and technology, ship stern tube, rubber stave bearing, copper backing, contact mechanics, real contact area, normal contact load, rubber plasticity index

中图分类号:

TH113.1

田红亮，郑金华，秦红玲. 舰船艉管水润滑橡胶板条轴承与铜背衬的机械接触力学[J]. 兵工学报, 2015, 36(12): 2369-2380.

TIAN Hong-liang， ZHENG Jin-hua， QIN Hong-ling. Mechanical Contact Mechanics of Water Lubrication Rubber Stave Bearing and Cu Backing for Ship Stern Tube[J]. Acta Armamentarii, 2015, 36(12): 2369-2380.

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