基于物质点法的多尺度计算

发布时间：2017-12-27 07:17

本文关键词：基于物质点法的多尺度计算　出处：《中国科学:物理学力学天文学》2017年07期 　论文类型：期刊论文

【摘要】：多尺度计算方法近年来受到了广泛关注,如何实现分子模拟方法与连续介质模拟方法的平滑过渡,以及如何高效、逼真地构建微细观尺度计算模型,是多尺度计算中需重点解决的问题.近二十年来迅速发展的无网格粒子类方法,特别是物质点法,以其优异的性质,在众多领域内得到了关注与成功应用.本文综述了近年来物质点法及其派生方法在多尺度计算领域的发展情况,包括分子动力学与物质点法的无缝连接、高频波反射抑制、微细观结构建模等方面的算法理论与应用情况,展示出基于物质点法的多尺度计算方法的优势.
[Abstract]:Multi scale calculation method in recent years has attracted extensive attention, how to achieve a smooth transition method and continuum simulation method of molecular simulation, and how to effectively and realistically construct the micro scale model, the calculation of the problem need to be solved emphatically. The multi-scale meshfree particle method developed rapidly in the past twenty years, especially the material point method, with its excellent properties, has been concerned with the successful application in many fields. This paper reviews the material point method and its derivative calculation method of development in the field of multi-scale, including molecular dynamics and material point method of seamless connection, high frequency wave reflection suppression, microstructure modeling etc. the algorithm theory and application, shows the calculation method of material point method based on multi scale advantage.
【作者单位】：清华大学航天航空学院;
【基金】：国家自然科学基金(编号:11472153,11102097,10872107) 北京高等学校青年英才计划(编号:YETP0111)资助项目
【分类号】：O302
【正文快照】： 1引言很多复杂问题,如断裂问题、湍流问题、强冲击下物质的相变问题等,本质上涉及宏细微观多个尺度,客观上要求采用多尺度计算方法进行分析.近年来随着对微纳米科技探索的不断深入,对适用于多个尺度的高效、准确数值方法的需求也在迅速增加.分子动力学(Molecular Dynamics,MD)

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