Multi-Modal Interactions in the Nonlinear Galloping of Soft-Slender Structure with Non-Circular Cross Section

摘要：

　　A continuous dynamic model of a soft-slender structure, possesses non-circular cross section, is established by Hamilton principle.In-plane, out-of-plane and torsional modes are included in the present model, where geometric and aerodynamic nonlinearities are considered.The first four in-plane and first four torsional modes of the model are then reserved by applying Galerkin method to study multi-modal transition and stimulation.The numerical simulation is carried out on an engineering project of galloping for iced transmission line.The results indicate that torsional vibration shows its submissiveness to its corresponding in-plane one.Lower (anti) symmetric mode performs to be only triggered by higher (anti) symmetric one.Galloping energy is also checked to be elicited by combined internal resonance, where lower mode is observed to be excited under the cooperation of two higher modes.

关键词： Soft-Slender Structure Galloping Modal interaction internal resonance

作者: Huo Bing Liu Peng

作者单位: College of mechanical engineering, Tianjin University of Science and Technology, Tianjin 300222,Chin College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030

会议类型: 国际会议

会议名称: Eighth Symposium on the Mechanics of Slender Structures(Moss 2019)(第八届国际细长结构力学论坛)

会议地点: 上海

会议语种:英文

页码: 92-93

在线出版日期: 2019-05-24（万方平台首次上网日期，不代表论文的发表时间）