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A heuristic viscosity-type dissipation for high frequency oscillation damping in time integration algorithms

机译:一种用于时间积分算法中高频振荡阻尼的启发式黏度型耗散算法

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A heuristic viscosity-type dissipation of strains is applied for controlling high frequency oscillationdamping in a one-step time integration. The basicidea of the approach is to apply damping in locations,where it is needed, at times when it is needed. To thisend a computationally efficient algorithm for identifyingthe need for damping is developed. The identificationalgorithm keeps track of the number of recent changesof signs of strain increments, which helps in decisionwhether damping should be engaged or not. A specialscaling function is introduced to smoothen the transitionbetween the damped and undamped phases. Theapproach is verified in the analysis of the geometricallyexact plane elastic beam.
机译:采用启发式黏度型应变耗散方法,以一步时间积分控制高频振荡阻尼。该方法的基本思想是在需要的地方,在需要的时候应用阻尼。为此,开发了一种计算效率高的算法来识别阻尼需求。识别算法跟踪应变增量迹象的最近变化次数,这有助于决定是否应该使用阻尼。引入了特殊的缩放功能,以平滑阻尼相位和无阻尼相位之间的过渡。该方法在几何精确平面弹性梁的分析中得到了验证。

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