摘要
该文采用格子Boltzmann方法(LBM)对二维圆柱涡激振动问题进行了研究。圆柱动力响应求解采用Newmark法,柱体附近使用多块(Multi-block)技术进行网格加密。综合分析了无量纲参数如折合阻尼SG、质量比M及频率比fn/fso等对圆柱两自由度涡激振动的影响,观察到了圆柱"8"字运动形态及其演化过程。研究结果表明:增大SG、M和fn/fso都能够抑制圆柱涡激振动响应,三者中质量比M对纵向位移的抑制效果更为明显;增大SG和M时位移max2Y/D一直减小,而增大fn/fso,max2Y/D会先增大再减小。
Abstract： In this paper, flow past a two-dimension vortex-induced vibration circular cylinder is studied numerically by the lattice Boltzmann method （LBM）. The dynamic response of the cylinder is obtained using the Newmark method, and themulti-grid technology is adopted near the cylinder. The computational results show the basic features of ＂8＂ movement pattern and its evolution by comprehensive analysis of the impact of the dimensionless parameters of the reduced damping SG, mass ratio M and frequency ratio fn/fso It reveals that dynamic response of the cylinder can be restrained by increasing SG, M and fn/fso .The horizontal maximum displacement 2Ymax/D is a monotonic decreasing function of SG and M, but its relationship with fn/fso is first increase then decrease
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2013年第2期167-175,共9页
Chinese Journal of Hydrodynamics
基金
国家重点基础研究发展计划(973计划
2010CB832700
2013CB036101)
国家自然科学基金项目(50921001
51279030)~~
