摘要
针对一类桥墩受车船撞击的问题,考虑车船与桥墩动力响应的耦合关系,简化建立反映碰撞过程的质点-刚性杆-弹簧体系力学模型;基于d’Alembert原理,建立该碰撞体系动力学方程,结合结构动力学理论对方程进行理论分析;运用MATLAB编程进行数值分析,得到该碰撞问题的撞击力曲线.讨论分析了车船质量、碰撞速度和接触刚度参数对撞击力以及撞击时间的影响,得到了一些有意义的结论.通过算例与相关文献对比,结果基本吻合,验证了本研究方法的有效性和实用性.
Aiming at the impact problem between a type of bridge pier and vehicle/ship and taking the coupling dynamic responses into account,a mechanical model of the particle and rigid rod linked with elastic elements reflecting the impact process was simplified and established.Based on d＇Alembert principle,the kinematics equations of the impact system were established.Combined with the theory of structural dynamics,the theoretical solution of the kinematics equations was given.Through MATLAB on the numerical calculation,the curve of impact force was obtained.Finally,the effects of vehicle/ship quality,initial impact velocity as well as contact spring stiffness on the impact force/time were studied,and some conclusions were obtained.The results were in good accordance with the relevant references on the same experiment.The validity and practicability of the proposed method was proved by compared results.
出处
《长沙理工大学学报（自然科学版）》
CAS
2013年第4期54-59,共6页
Journal of Changsha University of Science and Technology:Natural Science
基金
国家自然科学基金资助项目(51108047)
关键词
车船
桥墩
力学模型
撞击力
撞击时间
vehicle/ship
bridge pier
mechanical model
impact force
impact time
