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Vehicle body system sound insulation performance prediction method based on series-parallel connection equivalent theoretical model

A theoretical model and performance prediction technology, applied in special data processing applications, geometric CAD, design optimization/simulation, etc., can solve problems such as the sound insulation performance of the whole vehicle, which can improve accuracy, save time and money, reduce The effect of changing the probability

Active Publication Date: 2022-01-28
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

However, these methods are all aimed at the prediction of the sound insulation performance of a single component, and no prediction method for the sound insulation performance of the whole vehicle has been proposed.

Method used

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  • Vehicle body system sound insulation performance prediction method based on series-parallel connection equivalent theoretical model
  • Vehicle body system sound insulation performance prediction method based on series-parallel connection equivalent theoretical model
  • Vehicle body system sound insulation performance prediction method based on series-parallel connection equivalent theoretical model

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing.

[0031] In this embodiment, a method for predicting the sound insulation performance of a body system based on a series-parallel equivalent theoretical model, its basic principle is as follows figure 1 shown. From the noise source (whose sound power level is represented by SWL) to the noise inside the vehicle (whose sound pressure level is represented by SPL 2 Indicates) the receiving point can be divided into source sound absorption, car body sheet metal sound insulation, sound insulation pad sound insulation, interior panel sound absorption, interior panel sound insulation and passenger compartment sound absorption, etc. The sound transmission losses caused by them are respectively Represented as STL 0 ~STL 5 . In the actual operation process, the noise source generally uses the sound pressure level SPL at a certain distance from the center point of the noise source 1...

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Abstract

The invention discloses a vehicle body system sound insulation performance prediction method based on a series-parallel connection equivalent theoretical model. The method comprises the following steps: S1, testing sound insulation and absorption performance of a flat plate material and constructing a database; s2, performing material selection and structural design of parts of the vehicle body system; s3, performing thickness distribution and area proportion analysis; and S4, predicting the sound insulation performance of the path. According to the invention, the sound insulation performance of the vehicle body system is predicted, the effects of different schemes can be accurately evaluated, and a large amount of time and expenditure are saved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of NVH control, in particular to a method for predicting sound insulation performance of a vehicle body system based on a series-parallel equivalent theoretical model. Background technique [0002] The noise inside the car is mainly generated by the power transmission system, tire / road surface and airflow on the body, and is transmitted to the human body and human ears through the body system. The body system includes the car body, acoustic packaging parts and interior and exterior trim parts, etc., which are the key transmission paths for isolating the source and external noise. etc.) is the key to path sound insulation design. For the sound insulation performance that can be achieved by different combination schemes, the current engineering generally relies on experience or statistical energy analysis (SEA) methods to predict, and there is a problem of low accuracy, which cannot accu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/20G06F119/10
CPCG06F30/15G06F30/20G06F2119/10Y02T90/00
Inventor 张思文姜豪刘宏玉贾文宇庞剑
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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