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Vibration acoustic analysis method for multi-layer CFRP structure flat plate

A vibro-acoustics and analysis method technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as unfavorable acoustic package optimization, and achieve the effect of accurate and convenient simulation calculation and high engineering practical value.

Pending Publication Date: 2019-04-16
TONGJI UNIV
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Problems solved by technology

In order to reduce the noise inside the car, it is necessary to analyze and optimize the sound insulation performance of the panels and the acoustic package. At present, there is a lack of full-frequency vibro-acoustic analysis of multi-layer structural panels, which is not conducive to the optimization of the acoustic package.

Method used

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  • Vibration acoustic analysis method for multi-layer CFRP structure flat plate
  • Vibration acoustic analysis method for multi-layer CFRP structure flat plate
  • Vibration acoustic analysis method for multi-layer CFRP structure flat plate

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Embodiment

[0027] Such as figure 1 As shown, the application proposes a vibroacoustic analysis method for a multi-layer CFRP structural plate, including the following steps:

[0028] S1. Obtain the material parameters and structural parameters of the multi-layer high-performance carbon fiber reinforced composite structural plate, and establish a finite element model;

[0029] S2. Set the boundary conditions and frequency range of the finite element model, solve it with a finite element solver, and obtain the mode of the multi-layer CFRP structural plate;

[0030] S3. Establish a plate model of the same size as the multi-layer CFRP structure plate and assign CFRP material properties to it, establish a sound source cavity and a receiving cavity on both sides of the plate model, generate a statistical energy analysis model, and obtain a multi-layer through statistical energy analysis Acoustic transmission loss of a CFRP structural slab.

[0031] In this embodiment, a 250x100mm CFRP plate ...

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Abstract

The invention relates to a vibration acoustic analysis method for a multi-layer CFRP structure flat plate, and the method comprises the following steps: S1, obtaining material parameters and structureparameters of the multi-layer CFRP structure flat plate, and building a finite element model; S2, setting a boundary condition and a frequency range of the finite element model, and solving the boundary condition and the frequency range by using a finite element solver to obtain a mode of the multi-layer CFRP structure flat plate; and S3, establishing a flat plate model with the same size as themulti-layer CFRP structure flat plate, endowing the flat plate model with CFRP material attributes, respectively establishing a sound source cavity and a receiving cavity at two sides of the flat plate model, generating a statistical energy analysis model, and obtaining the sound transmission loss of the multi-layer CFRP structure flat plate through statistical energy analysis. Compared with the prior art, the modal analysis and the sound transmission loss analysis are carried out by applying HyperMesh software and VAOne software, the simulation calculation is accurate and convenient, and theengineering practical value is high.

Description

technical field [0001] The invention relates to the field of modal analysis and acoustic performance optimization of a flat plate structure, in particular to a vibration-acoustic analysis method for a multi-layer CFRP structure flat plate. Background technique [0002] Using high-performance fiber reinforced plastic (carbon fiber reinforced plastic, CFRP) to partially replace traditional metal materials is currently the most effective way to achieve lightweight vehicles. CFRP is used as a lightweight structural material for automobiles instead of metal materials, and its performance can fully meet the requirements. The use of CRRP instead of aluminum will change the sound insulation performance of the component. In order to reduce the noise inside the vehicle, it is necessary to analyze and optimize the sound insulation performance of the panels and the acoustic package. At present, there is a lack of full-frequency vibro-acoustic analysis of multi-layer structural panels, ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 吴宪刘基天邵建旺邓国明赵猛曾涛
Owner TONGJI UNIV
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