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在考虑未变形磨屑厚度影响流入工件的热流密度分布的情况下,分析了现有热源模型热载荷的离散加载过程及其对数值仿真计算结果的误差影响;基于有限元法将连续性问题进行离散处理的思想,提出了不可积分函数分布热源模型的热载荷加载方法;利用新提出的热载荷加载方法,采用抛物线分布、瑞利分布的热源模型对典型磨削工况进行仿真计算,研究了热源模型对磨削温度场的影响规律。结合磨削试验温度测量值及磨削温度的理论解析式,发现有限元仿真计算结果真实可靠;证明提出的加载方法可有效解决不可积分函数分布的热源模型的热载荷加载难题,并为进一步研究磨削温度场提供理论依据。
Considering the influence of the thickness of undeformed wear debris on the heat flux distribution into the workpieces, the discrete loading process of the heat load of the existing heat source model and its error influence on numerical simulation results are analyzed. Based on the finite element method, the continuity problem The paper puts forward the hot load loading method of the heat source model with non-integral function distribution. By using the new heat load loading method, the typical grinding condition is simulated by the parabola distribution and Rayleigh distribution heat source model. Influence of heat source model on grinding temperature field. Combined with the theoretical analysis of temperature measurement and grinding temperature, it is found that the finite element simulation results are true and reliable. It is proved that the proposed loading method can effectively solve the thermal load loading problem of heat source model with non-integral function distribution. Grinding temperature field to provide a theoretical basis.