珩磨缸套与活塞环表面弹塑性接触分析  

Elastoplastic Contact Analysis of Honed Liner and Ring Surface

作　　者：汤义虎[1,2] 林缨 黄立 李丽婷 孟祥慧 TANG Yihu;LIN Ying;HUANG Li;LI Liting;MENG Xianghui(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]中国船舶集团有限公司第七一一研究所,上海201108

出　　处：《摩擦学学报》2023年第9期1026-1033,共8页Tribology

基　　金：国家自然科学基金(52130502)资助。

摘　　要：缸套-活塞环表面接触分析,能够对船用发动机设计决策提供重要支持.由于缸套珩磨网纹表面具有双高斯分布特征,基于高斯分布假设建立的统计接触力学模型无法反映缸套-活塞环表面的真实接触状态.本文中基于边界元理论,采用快速傅里叶变换和共轭梯度法,开发了粗糙接触弹塑性接触数值仿真分析方法,并对缸套珩磨网纹表面与活塞环接触状态进行了仿真计算,获得了表面真实接触压力、接触面积、弹塑性变形和应力等接触特性参数,研究了不同载荷作用下珩磨网纹表面接触演变规律,为活塞环缸套摩擦学设计奠定了基础.Cylinder liner scuffing is one of the most critical failure modes in piston ring and cylinder liner assembly,which has become a major engineering bottleneck in the development of high-performance internal combustion engines.Studying the contact characteristics,including the contact pressure,contact area,and stress of the piston ring and the cylinder liner is an important way to understand the surface contact state,and is also of great significance for a reasonable friction couple design,preventing the scuffing failure of friction couple,and improving the economy and reliability of internal combustion engines.Although numerous studies have been conducted on the simulation of rough surface contact and tribological performance of piston rings and cylinder liners,most studies still use GT(Greenwood&Tripp)statistical contact models based on gaussian or exponentially distributed surfaces.The research on the real surface contact model and its contact characteristics of the honing surface of the cylinder liner with compound machining characteristics and obeying the bi-gaussian distribution is not enough,and it cannot reflect the real surface contact state of the friction pair of the piston ring and cylinder liner.In this paper,based on boundary element theory,a numerical simulation analysis method of rough contact elastoplastic contact was established by using fast Fourier transformation and conjugate gradient method.Contact characteristic parameters such as real contact pressure,contact area,elastoplastic deformation and surface stress were used to study the contact evolution of the cylinder liner honing surface under different loads.The results showed that considering the elastoplastic contact model,the contact pressure of the honing surface of the cylinder liner was relatively uniform,indicating that the applied load was uniformly borne by surface asperity;in the non-contact area such as the honing valley,due to the superposition of deformation,the elastic deformation of the non-contact area was not equal to zero,and

关 键 词：缸套 珩磨网纹 弹塑性接触 快速傅里叶变换 共轭梯度法 粗糙面 

分 类 号：TH117.1[机械工程—机械设计及理论] TG142.1[一般工业技术—材料科学与工程]