关键词: 高速受电弓, 高铁车辆, 轮轨接触动力作用, 刚柔耦合仿真, 碳滑板磨损, 局部高应力

Abstract: Considering the dual-factor influences of wheel-rail contact wear and carbon strip abrasion,the dual coupling simulation technical platform of wheel-rail and pantograph-catenary interactions was formulated so as to study deeply the rigid-flex coupling vibration influences of high-speed rolling stock to the local high stress of high-speed pantograph.The typical case investigations indicated that the high-cycle fatigue problems and three important factors including dynamical interactions of wheel-rail contact,lateral frictional disturbances of carbon strip and fluid-solid coupling effects exist in high-speed pantographs.For the development of high-speed bogie,the limited velocity should be promoted scientifically in the united and normative condition of wheel-rail matching to reduce the dynamical interaction of wheel-rail contact.Since the commercial velocity 400 km/h was very approaching to the limited velocity of high-speed bogie,the primary principle of light-weight design must be stressed in the development of high-speed pantograph,and the lowest-order modal frequency of lateral elastic vibration should be greater than 12 Hz.By taking the inner force precise analyses of complex constraints as the main determinants for high-cycle fatigue problems,the novel construction design of next-generation high-speed pantograph was proposed.By applying the connection structure design like duck's egg,the joint dynamical loads can be decentralized effectively and the high-cycle fatigue can be transferred into static strength problem.

Key words: high-speed pantograph, high-speed rolling stock, dynamical interactions of wheel-rail contact, rigid-flex coupling simulation, carbon strip abrasion, local high stress