In-vehicle intermediate frequency noise analysis method and medium

An intermediate frequency noise and analysis method technology, applied in the fields of instrumentation, computer material science, design optimization/simulation, etc., can solve problems such as large proportion of structural paths, indirect coupling loss, and inability to effectively control noise, and achieve the effect of improving simulation accuracy.

Pending Publication Date: 2021-09-03
GREAT WALL MOTOR CO LTD
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for the mid-frequency band, the noise transfer not only involves the air path, but also involves the structure path, and the lower the noise frequency, the greater the proportion of the structure path may be
However, when using the existing SEA method for mid-frequency noise analysis, the modal density of the model created by it is relatively low, and there is an indirect coupling loss problem transmitted through the global mode when the noise is transmitted, and it is impossible to use the structural path as the main transmission path. effective control of noise

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • In-vehicle intermediate frequency noise analysis method and medium
  • In-vehicle intermediate frequency noise analysis method and medium
  • In-vehicle intermediate frequency noise analysis method and medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0035] In addition, the meanings of some terms mentioned in the embodiments of the present invention are as follows:

[0036] 1. Acoustic package (Sound Package) refers to the acoustic material package designed to achieve the NVH (Noise, Vibration, Harshness, noise, vibration and ride comfort) performance of the whole vehicle, such as the sound insulation pad of the front wall of the engine compartment, the interior decoration absorber, etc. Acoustic materials, leak hole plugging parts, sheet metal expansion glue, etc., can be understood as the application of vehicle acoustic materials. Among them, for the acoustic materials on the car, more vivid examples, such as the carpet laid in the car, the cotton filled in the door, etc., can play a role in attenuating and weakening the noise, which is an element that sho...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the field of vehicle noise processing, and provides an in-vehicle intermediate frequency noise analysis method and a medium. The method comprises the following steps: establishing a statistical energy analysis (SEA) model for representing noise transmission based on an air path, and loading an excitation sound load under an actual working condition on the SEA model to calculate noise transmitted through the air path; establishing a finite element FE-SEA hybrid model for representing noise transmission based on the structural path, and loading an exciting force load under an actual working condition on the FE-SEA hybrid model to calculate noise transmitted through the structural path; and carrying out in-vehicle intermediate frequency noise analysis based on the SEA model and the FE-SEA hybrid model. According to the method, on the basis of the SEA model, the sound transmission influence of a middle-frequency band structure path is completely considered by establishing the FE-SEA hybrid model, and full-frequency band in-vehicle noise simulation prediction is formed.

Description

technical field [0001] The invention relates to the technical field of vehicle noise processing, in particular to a method and medium for analyzing intermediate frequency noise in a vehicle. Background technique [0002] In recent years, the competition in the automotive industry has become increasingly fierce, and customers are paying more and more attention to the comfort of the car. The noise level in the car is not only an important reference standard for measuring the comfort of the car, but also gradually becomes a standard for many car companies to improve. An important direction of product competitiveness. Among them, the acoustic package is an important way to control the noise inside the car. The use of the acoustic package can not only improve the acoustic characteristics of the car, reduce the noise inside the car, but also adjust the sound quality in the car to meet the psychological expectations of customers. [0003] At present, the development and design of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G16C60/00G06F119/10
CPCG06F30/23G16C60/00G06F2119/10
Inventor 米路
Owner GREAT WALL MOTOR CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap