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首页> 外文期刊>Journal of Applied Nonlinear Dynamics >Multiple Moving Force Identification Based on Bridge Bending Moment Influence Lines
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Multiple Moving Force Identification Based on Bridge Bending Moment Influence Lines

机译：基于桥梁弯矩影响线的多个移动力识别

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摘要

Identification of the moving forces on a bridge is essential to bridge design and management. A new method for identifying the time varying axle loads is presented in this research using the bending moment influence line. Based on the theorem of modal superposition and taking the damping force into consideration, several modal accelerations can be obtained from measured accelerations of the bridge at several sections. Based on the d'Alembertian theory, the inertia force of the bridge is expressed as a distributed load. Using the bending moment influence lines of the bridge, the moving force contributing to the moment and the inertia force are obtained. The formulation about flexural moment and moving force is obtained correspondingly. An optimization method is used to find the solution of the equations, and then the moving forces can be obtained at any given time. Examples show that the method has a high accuracy in identifying moving forces even though there are more than one time varying forces. By applying the proposed method, information regarding the moving forces can be obtained without solving the dynamic equation, resulting in an efficient model for applications in engineering.
机译：识别桥梁上的移动力对于桥梁设计和管理至关重要。在本研究中，使用弯矩影响线在本研究中呈现了一种识别时间变化轴载的新方法。基于模态叠加的定理以及考虑阻尼力的定理，可以从几个部分从桥的测量加速度获得几种模态加速度。基于D'乙师理论，桥梁的惯性力表示为分布式负载。使用桥梁的弯矩影响线，获得了贡献瞬间和惯性力的移动力。关于弯曲力矩和移动力的制剂相应地获得。优化方法用于找到方程的解决方案，然后可以在任何给定时间获得移动力。示例表明，即使存在多于一个时间变化力，该方法在识别移动力时具有高精度。通过应用所提出的方法，可以获得有关移动力的信息，而无需解决动态方程，导致工程中的应用有效模型。

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