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A Parallel O(N) Formulation for General Multibody Dynamics

机译:通用多体动力学的并行O(N)公式

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摘要

A new methodology for dynamical analyses applicable to a very large class of rigid and flexible multibody systems is presented. It is based on a variable -gain error correction method with scaling, and has the following distinctive features: ( ⅰ ) All kinds of holonomic and nonholonomic equality constraints can be treated in a plain and unified manner ; (ⅱ) Stability of the constraints is always attained ; (ⅲ) The formulation has an order N computational cost in terms of both the constrained and unconstrained degrees of freedom, regardless of the system topology; (ⅳ) Unlike the traditional recursive order N algorithms, it is quite amenable to parallel computation ; (ⅴ) Since no matrix operations are involved, it can be implemented to very simple general purpose simulation programs. Versatility, dynamical validity and efficiency of the approach are checked through numerical studies of several particular systems.
机译:提出了一种适用于很大种类的刚性和柔性多体系统的动力学分析新方法。它基于具有缩放比例的可变增益误差校正方法,并具有以下鲜明特征:(ⅰ)可以完整统一地对待所有完整和非完整的等式约束; (ⅱ)始终保持约束的稳定性; (ⅲ)不论系统拓扑如何,就约束自由度和不受约束自由度而言,公式的计算成本均为N阶; (ⅳ)与传统的递归阶数N算法不同,它非常适合并行计算; (ⅴ)由于不涉及矩阵运算,因此可以将其实现为非常简单的通用仿真程序。通过对几种特定系统的数值研究,检查了该方法的多功能性,动态有效性和效率。

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