摘要
首先建立非线性水下涡激振动俘能装置的动力学模型,求解非线性恢复力,并通过分析势能函数确定其三稳态的优越性。然后利用系统非线性动力学方程的用户自定义函数(udf)对ANSYS Fluent软件进行二次开发,结合overset嵌套网格技术,对3种截面形状(圆形、花瓣形、倒圆角三角形)振子的振幅比、尾迹涡旋、功率比进行分析。结果表明:圆形截面振子做大幅度的跨阱运动最早且共振区间宽,最大振幅比为2.129,最高功率比峰值为4.89,由此确定圆柱为最优截面振子,更有利于实现能量转化。
A dynamic model of the nonlinear underwater vortex-induced vibration energy harvesting device is established,and the nonlinear restoring force is solved.The superiority of the three steady states is determined by analyzing the potential energy function.The user-defined function(UDF)of the nonlinear dynamic equation of the system is used to conduct secondary development of the ANSYS Fluent software,and combined with the overset nested grid technology,the vibration response,amplitude ratio,wake vortex,power ratio of three cross-sectional shapes of oscillators(circular,petal-shaped and rounded corner triangular)are analyzed.The results show that the circular cross-sectional oscillator performs large-scale cross-well motion earliest has a wide resonance interval,with the maximum amplitude ratio of 2.129 and the highest power ratio peak of 4.89.It is determined that the cylinder is the optimal cross-sectional oscillator,which is more conducive to energy conversion.
作者
韩飞燕
任航
田成
刘丽兰
豆卫涛
Han Feiyan;Ren Hang;Tian Cheng;Liu Lilan;Dou Weitao(School of Aeronautical Manufacturing Engineering,Xi'an Aeronautical Polytechnic Institute,Shaanxi Xi'an,710089,China;Shaanxi Provincial Key Laboratory of Aerospace Fastener Technology and Application,Xi'an Aeronautical Polytechnic Institute,Shaanxi Xi'an,710089,China;School of Mechanical and Instrumental Engineering,Xi'an University of Technology,Shaanxi Xi'an,710048,China;Quality Department,Western Superconducting Material Technology Co.,Ltd.,Shaanxi Xi'an,710018,China)
出处
《机械设计与制造工程》
2025年第8期7-12,共6页
Machine Design and Manufacturing Engineering
基金
陕西省教育厅产业化培育项目(24JC047)。
