Simulation analysis system for abnormal sound of automotive upholstery and analysis method thereof

Abstract

The invention discloses a simulation analysis system for the abnormal sound of automotive upholstery. The simulation analysis system comprises a modeling module, a loading module and a simulated analysis module; the modeling module is used for establishing an interior vehicle body finite element model and endowing an abnormal sound analysis object with a rigidity value; the loading module is used for respectively loading a static limit torsion working condition and a dynamic road spectrum working condition by adopting a gravity field method; and the simulated analysis module is used for performing simulation analysis to respectively obtain a limit relative displacement value and a time domain relative displacement curve of the abnormal sound analysis object under the two working conditions, and when the relative displacement at any moment under the two working conditions is smaller than the set displacement, determining that no abnormal sound risk exists. The invention further discloses an analysis method of the simulation analysis system for the abnormal sound of automotive upholstery. The analysis method comprises the steps that a finished automobile finite element model is established, the static limit torsion working condition and the dynamic road spectrum working condition are loaded respectively, time domain transient response analysis is carried out to obtain time domain relative displacement curves respectively, and whether the abnormal sound risk exists or not is judged according to the relative displacement. According to the invention, the accuracy of abnormal sound prediction is improved.

Description

technical field [0001] The invention relates to the technical field of automobile simulation analysis, in particular to a simulation analysis system and analysis method for abnormal noise of automobile interior parts. Background technique [0002] The abnormal sound problem has attracted more and more attention. The abnormal sound problem of door locks and deadbolts, door seals, sheet metal paint parts and other interior parts accounts for a large proportion of abnormal noise in the car body. Control needs to use CAE means, but there are relatively few simulation methods for abnormal noise in the industry at present, and there is no mature industry standard for reference. At present, the load of constant torque (2000Nm) is commonly used in the industry to evaluate the torsional stiffness of the car body. This method can calculate the torsional stiffness of the car body. However, it is impossible to accurately calculate the relative deformation of the local position of the in...

AI Technical Summary

Problems solved by technology

[0004] The above technical solution has the following problems: 1. To calculate the relative displacement amplitude of the node pair at the preset frequency, the road spectrum collection of the vehicle is required in the early stage of the simulation, which is time-consuming and labor-intensive; 2. The road spectrum collection needs to be measured after at least the mule car comes out , and there are differences between the collected data and the final real vehicle, which cannot be predicted in advance, and the simulation accuracy is low; 3. The working conditions are not considered comprehensively, and the driving limit conditions of the real vehicle are not considered

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