Method for analyzing acceleration vibration noise of whole vehicle

Abstract

A method for analyzing acceleration vibration noise of a finished automobile belongs to the technical field of NVH (Noise Vibration and Harshness) analysis of the finished automobile, and comprises the following steps: constructing an automobile body model without an engine assembly and a chassis assembly; applying a plurality of excitation points on the vehicle body model according to the acceleration load transmission path; testing the load of each excitation point on the whole vehicle model under the acceleration condition; setting a response point of the vehicle body model, and applying a corresponding acceleration working condition on the vehicle body model; the method has the advantages that by creating the simple vehicle body model and applying the excitation points on the vehicle body model according to the acceleration load transmission path, the model creating period is shortened, it is guaranteed that whole vehicle acceleration analysis is normally and efficiently carried out, the development period of a new vehicle type is shortened, and the development efficiency of the new vehicle type is improved. And the noise response under the acceleration working condition is analyzed by adopting an order analysis method, so that the reliability of an analysis result is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle NVH analysis, in particular to an analysis method for vehicle acceleration vibration noise. Background technique [0002] Today's cars, especially small cars, have more and more functions and experiences in addition to their most basic function, that is, as a means of transportation for travel. NVH and comfort are the most sensitive ones, and they are also very concerned and easily perceived by consumers today. The vibration and noise under acceleration is a key indicator to measure NVH. [0003] At present, the vehicle acceleration analysis simulation model is the vehicle model of the real vehicle, including all parts of the vehicle, namely: body, opening and closing parts, powertrain, chassis, intake and exhaust, and all interior and exterior decorations. According to the requirements of the design and simulation process, when analyzing the acceleration of the vehicle, when determining the load...

AI Technical Summary

Problems solved by technology

[0004] The current analysis method requires a complete vehicle model, which is complex, requires chassis and engine data, and has a long creation cycle; key parameters, such as the test of the stiffness curve of the chassis connection point bushing, are complex and have a long cycle, which reduces the efficiency of vehicle acceleration analysis. Influence the development cycle of new models

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