| In recent years, some scholars at home and abroad through the bridge response to the axle load of vehicle load on the bridge recognition, its purpose is in does not affect the normal traffic, bridge of dynamic weighing system to estimate the weight of the vehicle, to collect vehicle information, reasonable governance combined with bridge structure performance evaluation.Some scholars when calculating the vehicle axle load, the regularization method is introduced into the traditional least square method, the static and dynamic axle load of the vehicle, but load identification is obtained by this method the accuracy of the results, to a large extent depends on the selection of regularization parameters correctly or not, but because in a real environment, noise and the influence of bridge deck roughness, so it is difficult to get a relatively accurate solution.In order to overcome the above problems, this paper first the basic theory of coupling vibration of car- bridge are expounded, and the corresponding vehicle.the system vibration equation is deduced, using the inverse Fourier transform to the deck roughness is simulated.Using MATLAB numerical simulation, based on the analytical solution of the beam, to calculate the dynamic response of a simply supported girder bridge under moving load, and the load identification, combined with traditional regularization method the influence factors of affecting the dynamic weighing bridge recognition results are analyzed.Finally using the bridge dynamic strain measurement data in the reference, based on the theory of moving load identification in time- based on the finite element model of traffic on the bridge dynamic weighing, of solving ill-posed solution, on the basis of traditional regularization method proposed a modified regularization optimization method based on static response, through the comparison and analysis with references of real value, to demonstrate the feasibility and effectiveness of the method is verified. |
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