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arXiv 1007.3240math.NAcs.NA
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异步变分接触力学

Asynchronous Variational Contact Mechanics

Computer Science Department, Columbia University(哥伦比亚大学计算机科学系);Walt Disney Animation Studios(华特迪士尼动画工作室)

Etienne Vouga, David Harmon, Rasmus Tamstorf, Eitan Grinspun

AI总结:

提出一种异步变分方法,通过将不同时间步长与力而非空间元素关联,并离散化势垒势能,解决复杂接触和冲击场景中的弹性体模拟问题,同时满足动量和能量守恒定律。

摘要:

开发了一种用于模拟复杂接触和冲击场景中弹性体的异步变分方法。异步变分积分器(AVI)通过将不同时间步长与力而非空间元素关联,扩展以处理接触力。通过将势垒势能离散化为无限个嵌套二次势能之和,这些扩展的AVI用于在遵守动量和能量守恒定律的同时解决接触问题。一系列二维和三维实例说明了该方法的鲁棒性和良好的能量行为。

英文摘要:

An asynchronous, variational method for simulating elastica in complex contact and impact scenarios is developed. Asynchronous Variational Integrators (AVIs) are extended to handle contact forces by associating different time steps to forces instead of to spatial elements. By discretizing a barrier potential by an infinite sum of nested quadratic potentials, these extended AVIs are used to resolve contact while obeying momentum- and energy-conservation laws. A series of two- and three-dimensional examples illustrate the robustness and good energy behavior of the method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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