摘要
微风振动虽然振幅较小,但长期振动可能造成导线疲劳损伤,影响线路稳定性。基于尾流振子模型,结合Newmark-β隐式方法和非线性牛顿迭代法,开发了针对输电线微风振动的数值模拟程序,采用龙格库塔方法求解尾流振子的范德波尔方程,确保计算精度与稳定性。研究表明,在高频振动下,非线性杆单元与尾流振子模型耦合能准确捕捉振动响应特性。为输电线微风振动的数值模拟方法提供理论支持,并验证了程序在高频振动分析中的适用性。
Although the amplitude of micro-wind vibration is small,prolonged vibration can cause fatigue damage to the conductors,affecting the stability of the transmission line.Based on the wake oscillator model,a numerical simulation program for transmission line micro-wind vibration was developed by combining the Newmark-βimplicit method and nonlinear Newton’s iteration method.The Van der Pol equation of the wake oscillator was solved using the Runge-Kutta method to ensure computational accuracy and stability.The result shows that under high-frequency vibration,the coupling of the nonlinear beam element with the wake oscillator model can accurately capture the vibration response characteristics.Theoretical support is provided for the numerical simulation method of transmission line micro-wind vibration and the applicability of the program in high-frequency vibration analysis is validated.
作者
代佳庆
DAI Jiaqing(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《科技和产业》
2025年第16期93-100,共8页
Science Technology and Industry
基金
重庆市研究生导师团队建设项目(JDDSTD022003)。
关键词
微风振动
尾流振子模型
涡激振动
有限元方法
breeze vibration
wake oscillator model
vortex-induced vibration
finite element method
