【摘要】 参考斜拉桥拉索的振动微分方程,利用动力学方程和莫里森方程,建立了锚索涡激振动方程,计算并讨论了锚索倾角、张力和长度的改变对其横向振动的影响。计算结果表明:锚索拉力和倾角的减小将引起振动幅值的增加和一阶固有频率、引起涡激流速锁定的流速、最大响应时的参数激励频率的减小;锚索垂直深度的减小将引起振动幅值的减小和一阶固有频率、引起涡激流速锁定的流速、最大响应时的参数激励频率的增加。更多还原

【Abstract】 By referring to the differential oscillation equation of stayed cable, the equations of vortex-induced oscillation of anchor cable are set up using dynamics and Morison equations. Also, the effects of obliquity, tension and length of anchor cable on its transverse oscillation are discussed. The results show that the decrease of the obliquity and tension of the anchor cable could induce the increase of the maximum response and the decrease of the first-order natural frequency, and also could induce the decrease of the locked current of vortex-induced and the maximum of parametric excitation frequency. The decrease of the vertical depth of the anchor cable could induce the decrease of the maximum response and the increase of the first-order natural frequency, and also could induce the increase of the locked current of vortex-induced and the maximum of parametric excitation frequency.更多还原