Dynamic Characteristics and Noise Evaluation of Bridge Expansion Device Under Mutiple Loading Conditions
The driving noise of a new type 160 modular bridge expansion device was studied.The transient analysis of the overall structure and the modal analysis of the center beam and side beam section steel were used to determine the system response laws when vehicles passing by in different working conditions through ANSYS.Then the response law is converted into acoustic excitation and acoustic analysis is performed using the Harmonic Acoustic module in ANSYS workbench by combining the finite element method(FEM.)and the boundary element method(BEM)to obtain the A sound level curve at different far fields in the human ear the most sensitive frequency range,the maximum A sound level occurrence frequency and the suitable installation position for the expan-sion device.A comparison is made with the literature test results to verify the reliability of the simulation results.The results show that the above method can effectively evaluate the driving noise of expansion devices,and the result has high reliability.
Modular Expansion DevicesMultiple Working ConditionsFinite Element MethodDynamic AnalysisBoundary Element MethodA Sound Level Curve
万方数据
维普
