Method for calculating vehicle interior noise

A calculation method and technology of automobiles, applied in the field of automobile noise, can solve the problems of inaccurate calculation of interior noise

Active Publication Date: 2017-06-13
JIANGLING MOTORS
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Problems solved by technology

[0004] The present invention aims to at least solve the problem that the noise in the car cannot be

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  • Method for calculating vehicle interior noise
  • Method for calculating vehicle interior noise
  • Method for calculating vehicle interior noise

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Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] see figure 1 , is the method for calculating interior noise of an automobile in the first embodiment of the present invention, including steps S11-S15.

[0034] In step S11, the finite element models of the frame, drive shaft and rear axle of the vehicle are respectively established and compared with their corresponding measured modes...

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Abstract

A method for calculating vehicle interior noise comprises steps as follows: finite element models of a vehicle frame, a transmission shaft and a rear axle of an automobile are established respectively, and benchmarking is performed between the finite element models and corresponding actually measured modes; modal calculation is performed on the finite element models of the vehicle frame, the transmission shaft and the rear axle after benchmarking, and modal calculation results are imported into a pure rigid multi-body model of a vehicle for establishment of a rigid-flexible coupled model; the rigid-flexible coupled model is subjected to time-domain response analysis, so that loads at connecting points during engine mounting are acquired; a transfer function from each connecting point to a target position in the vehicle is acquired; the noise pressure level from each connecting point to the target position is calculated according to the load of the corresponding connecting point and the corresponding transfer function. The accurate load data of each connecting point is extracted through the rigid-flexible coupled model of the vehicle, and the accurate noise pressure level in the vehicle is acquired in real time in the time domain of each connecting point during engine mounting in combination with the corresponding transfer function.

Description

technical field [0001] The invention relates to the technical field of automobile noise, in particular to an automobile interior noise calculation method. Background technique [0002] With the development of society and the advancement of technology, people's requirements for car quality are increasing day by day, and the noise problem in the car has attracted more and more attention. Car noise, vibration and the car ride comfort caused by it have become a measure An important indicator of the quality of a car. [0003] The noise inside the car is mainly produced by noise sources such as the car engine, the central transmission system, and tires, among which the noise generated by the car engine accounts for the main part. The essence of the calculation method of the noise inside the car is to calculate the noise sound pressure level transmitted to the driver in the car through the relevant noise source. At present, the noise level inside the car is mainly calculated by th...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20G06F30/23Y02T90/00
Inventor 邓磊段龙杨刘波余显忠金栋孙念芬官明俊
Owner JIANGLING MOTORS
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