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| 运用修正剪应力输运湍流模型模拟双自由度涡激振动 | |
| 引用本文： | 倪问池,康庄,张橙,张立健. 运用修正剪应力输运湍流模型模拟双自由度涡激振动[J]. 上海交通大学学报, 2017, 51(7): 819-825 |
| 作者姓名： | 倪问池 康庄 张橙 张立健 |
| 作者单位： | 1. 哈尔滨工程大学 深海工程技术中心, 哈尔滨 150001; 2. 加州大学伯克利分校 土木与环境工程学院, 加利福尼亚 伯克利 94720 |
| 摘 要： | 针对低质量比圆柱双自由度涡激振动振幅响应的数值模拟结果小于实验值的问题,基于OpenFOAM开源软件,对标准剪应力输运(SST)湍流模型以及数值模拟方法进行了修正,并通过圆柱绕流算例进行验证.运用扫频法,对约化速度为2~14,质量比m~*=2.6的圆柱双自由度涡激振动进行了数值模拟,并对结果进行了详细的分析与对比.结果表明,与标准SST模型的结果相比,采用修正SST模型的数值模拟结果与实验数据更为接近,运用扫频法能更好地体现涡激振动的非线性特性.文中提出的修正模型可以应用于海洋立管涡激振动的预报. |
| 关 键 词： | 双自由度 涡激振动 湍流模型 扫频法 数值模拟 |
Simulation of Two Degrees of Freedom Vortex Induced Vibration byUsing Improved Shear Stress Transport Model |
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| NI Wenchi,KANG Zhuang,ZHANG Cheng,ZHANG Lijian. Simulation of Two Degrees of Freedom Vortex Induced Vibration byUsing Improved Shear Stress Transport Model[J]. Journal of Shanghai Jiaotong University, 2017, 51(7): 819-825 | |
| Authors: | NI Wenchi KANG Zhuang ZHANG Cheng ZHANG Lijian |
| Affiliation: | 1. Deepwater Engineering Research Center, Harbin Engineering University, Harbin 150001, China; 2. Civil and Environmental Engineering, University of California, Berkeley 94720, California, USA |
| Abstract: | According to the existing literature, the calculated results of numerical simulations of two degrees of freedom (DoFs) vortex induced vibration with low mass ratio of column are not ideal. Especially, the maximum vibration amplitude is significantly smaller than the experimental value. In this paper, based on open source software OpenFOAM, the standard shear stress transport (SST) turbulence model and numerical simulation method are improved. Then, the vortex induced vibration of a cylinder with a mass ratio of 2.6 and a double DoF from 2 to 14 is simulated by the sweep frequency method, and the results of numerical simulation are analyzed and compared. Results show that the numerical simulation results of the improved SST turbulence model can be more close to the experimental data, and the sweep frequency method can better reflect nonlinear characteristics of the vortex induced vibration. |
| Keywords: | two degrees of freedom vortex induced vibration turbulence model sweep frequency method numerical simulation |
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