An aluminum vehicle body noise transfer path optimization method based on plate sound pressure contribution

A technology for noise transfer and path optimization, applied in design optimization/simulation, instrumentation, geometric CAD, etc., can solve problems affecting vehicle driving safety, increase driver and passenger fatigue, improve noise transfer characteristics, and shorten R&D. cycle, the effect of improving efficiency

Pending Publication Date: 2019-04-16
SUZHOU AUTO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The noise inside the car not only increases the fatigue of the driver and passengers, but also affects the driving safety of the car

Method used

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  • An aluminum vehicle body noise transfer path optimization method based on plate sound pressure contribution
  • An aluminum vehicle body noise transfer path optimization method based on plate sound pressure contribution
  • An aluminum vehicle body noise transfer path optimization method based on plate sound pressure contribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Please refer to figure 1 , the present embodiment is a method for optimizing the noise transmission path of an aluminum body based on the sound pressure contribution of the panel, which includes the following steps:

[0031] (1) Design input: The finite element model of the vehicle body and the finite element model of the acoustic cavity are established in the Hyper Mesh software.

[0032] (2) Boundary condition setting: it includes setting the excitation point and response point, setting the analysis frequency range; and respectively applying the set load force F (such as 1N) along the X axis, Y axis, and Z axis at the excitation point The excitation; the analysis frequency range is 20-200Hz.

[0033] in,

[0034] Please refer to figure 2 , the excitation points include: left rear shock absorber mounting point 101, rear suspension mounting point 102, left rear shock absorber mounting point 103, front suspension mounting point 104, left suspension mounting point 105...

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PUM

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Abstract

The invention discloses an aluminum vehicle body noise transmission path optimization method based on plate sound pressure contribution. according to a cab plate structure optimization method aiming at vibration attenuation and noise reduction, the vibration characteristic of a plate is improved through measures of optimizing the thickness of the plate, reasonably arranging reinforcing ribs and the like, the vibration amplitude is reduced, and the acoustic comfort of a cab is improved. According to the method, the acoustic contribution degree of the plate is analyzed before structural optimization, so that the structural plate with the maximum influence on noise in the cab is determined, and therefore targeted structural optimization is achieved; According to the analysis method based on the plate contribution amount, a structural part which greatly contributes to a noise transmission path can be effectively found, so that structural optimization can be effectively carried out on a keyposition, the noise transmission characteristic is improved, the structural design optimization efficiency is greatly improved, the research and development period is shortened, and the cost is reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of automobiles, in particular to a method for optimizing the noise transmission path of an aluminum body based on the sound pressure contribution of panels. 【Background technique】 [0002] Structural acoustic transfer function, also known as noise transfer function (Noise Transfer Function, referred to as NTF), refers to the sound pressure generated by a unit force applied to a structure in the structure, which represents the acoustic correlation characteristics of its structure and internal acoustic cavity. When an excitation attachment point on the vehicle body is stimulated, the excitation is transmitted to other places through the vehicle body, thereby causing the body panel to vibrate and radiate noise to the interior of the vehicle. The relationship between this force and noise is called the acoustic transfer characteristic of the vehicle body structure. [0003] With the rapid development of modern ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23Y02T90/00
Inventor 宿佳敏王若满孙营宋峰田永义
Owner SUZHOU AUTO TECH
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