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车桥耦合振动下,车辆动载作用于公路桥梁引发桥体振动,桥体的振动反过来影响车辆的振动。本文通过对车辆动载体系进行模拟简化,建立阻尼、弹簧和质量块组合体系仿真模拟车辆,利用车桥间的相互作用力将仿真体系与有限元简支桥梁模型进行耦合,得出了车-桥耦合系统的动力学方程组;采取Wilson-θ逐步积分法,对车-桥耦合动力方程组进行求解,并得出车-桥耦合振动系统的时程响应,通过已有经验对其进行类比评价,结果表明:该算法与已有算法结果吻合;利用该算法对简支梁的车-桥耦合相关影响因素进行了计算分析。
Vehicle-bridge coupling vibration, vehicle dynamic load on the highway bridge caused bridge vibration, bridge vibration in turn affect the vehicle vibration. In this paper, by simulating and simplifying the vehicle dynamic system, the damping, spring and mass combination system is established to simulate the vehicle, the simulation system is coupled with the finite element simple-supported bridge model by using the interaction force between the vehicle and the bridge, Bridge dynamic equations coupled to the system; Wilson-θ step-by-step integration method to solve the vehicle-bridge coupled dynamic equations, and get the vehicle-bridge coupled vibration system of the time-history response, through the existing experience of its analogy The results show that the algorithm is in good agreement with the existing algorithm. The influence factors of vehicle-bridge coupling of simply supported beam are calculated and analyzed.