横向流激励下绳索的扩张和回转运动

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基金项目: 江苏省“333人才工程”基金资助项目;航空高校自选课题资助项目

Stretch and Rotation of a Suspended Cable Subject to Transverse Fluid Excitation

Institute of Vibration Engineering Research, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P R China

摘要: 基于横向流激励下绳索的微段受力分析,建立了横向流体对绳索作用力的解析表达.借助坐标变换,将绳索的运动表示为扩张和回转两部分.在此基础上,分析了小垂跨比绳索的流激振动问题,对无伸张态临界流速、平衡解稳定性、重力对绳索运动的影响等问题进行了讨论.
- 绳索 /
- 流激振动 /
- 稳定性
Abstract: On the basis of analysis of the fluid drag acting on a suspended cable subjected to transverse fluid excitation,an expression is established for the fluid forces applied on the cable.By using a coordinate transform,the equations of motion of the cable are simplified into those in terms of the stretch and rotation coordinates.In the case of small ratio of sag-to-span,a study is made on the fluid-induced vibration behavior of the cable,including the critical fluid flow speed,the stability of equilibrium position,as well as the influences of gravitational parameter on the cable dynamics.
- cable /
- fluid-induced vibration /
- stability

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