铰链机构磨损高真感数值仿真

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英文题名：High-reality Numerical Simulation on Mild Wear of Hinge Configurations 作者：易风 论文级别：硕士 学科专业名称：机械制造及其自动化 中文关键词：磨损 ; 高真感数值仿真 ; 可靠性 ; 铰链机构 英文关键词：wear ; high-reality numerical simulation ; reliability ; hinge configrations 学位年度：2003 导师：江亲瑜 学科代码：080201 学位授予单位：大连铁道学院 论文提交日期：2003-05-01

摘要

磨损是摩擦学研究中的重要领域之一。然而，现行的磨损研究方法普遍采用大量的模拟试验来进行经验性的探索，而对复杂的动态磨损问题，至今还难以清楚地了解其从始至终的全过程，仍然存在三大难题有待于解决。它们是：摩擦副磨损寿命预测、状态监测及参数优化设计。本文基于离散数学理论和计算机技术提出了一种数值仿真模型，可用于解决复杂动态非线性系统的磨损问题，为彻底解决上述三大难点创造了条件，并着重突出数值仿真的高真感性，增加了数值仿真模拟现实的真实性。本文所述的高真感包括两项指标：温度因素和可靠性理论。一方面，温度和应力一样对零件的磨损过程影响很大，都应纳入磨损的计算过程中；另一方面，外界环境的不确定因素很多，磨损寿命应该采用概率寿命的表述形式。本文着重研究了磨损仿真的高真感性，研究了温度、压力对磨损的影响，引入了可靠性理论，提出了线接触零件磨损的高真感数值仿真通用模型。在此基础上又研究了铰链机构磨损仿真通用模型。最后以曲柄滑块为研究对象，融入上述两个通用模型，研究曲柄与机架，曲柄与连杆，连杆与滑块三对摩擦副铰接处的磨损，提出了具体的算法方案并在Visual Basic环境下编写了通用程序。计算结果实现了温度及压力对磨损仿真的影响，不确定因素对磨损寿命的影响，从而实现了高真感仿真的目标。
Wear is an important field in the studies of tribology, however, a mass of simulation tests are adopted generally by actual wear-study method to explore experientially. As for complicated dynamic wear, its whole process from beginning to end has not been comprehended clearly up to the present, and there are still three difficult problems awaited to solve, which include the wear longevity forecast of the rub, status surveillance and parameter optimization design. Based on the discrete mathematics and computer technology, a numerical simulation model is presented in this paper, and it can be used to deal with the wear process characterized by dynamic and non-linear systems, facilitating the above mentioned three difficulties, moreover, the high reality of the numerical simulation is emphasized, which increases the authenticity of the numerical simulation. The high-reality-sense presented in the paper includes two indexes, which are temperature field factor and reliability theory. On the one hand, there is grea
    t influence of temperature field factor and reliability theory on the wear process of parts, which cannot be ignored; on the other hand, because of the uncertainties of outer circumstances were longevity should adopt the expression form of probability longevity. The high reality of numerical simulation is studied prominently in the paper, studying the influence of temperature field on wear, introducing the reliability theory and bringing forward the universe model of the high-reality numerical simulation bout linear contact parts. At last the crank dieblock is taken as the study object, and the above two universe models are included. The joint wear between crank and frame, crank and connecting rod, connecting rod and dieblock is studied. The concrete arithmetic project is brought forward and the universe program written in the VB environment is supplied. The result of calculation realized the influence of the temperature field to wear simulation and uncertainty factor to abraion life. Consequently realized t
    he
    target of high-reality simulation.

引文

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