# Identification and control of booming noise of thin-walled metal plates of commercial vehicle body subjected to high-speed airflow

## TL;DR

This paper presents a method to identify and reduce booming noise in thin metal plates on commercial vehicles caused by high-speed airflow.

## Contribution

A novel method combining experimental and simulation techniques to control TWMP booming noise is proposed.

## Key findings

- The method identifies problem frequencies and noise sources through amplitude-frequency and modal analysis.
- Damping patch parameters can be optimized to significantly reduce vibration and noise.
- Simulation results align well with experimental data, validating the method's effectiveness.

## Abstract

The thin walled metal plates (TWMP) on top of a commercial vehicle body are easy to produce vibration and booming noise under the action of high-speed airflow, which reduces the sound quality inside the vehicle. Therefore, the effective control of the noise of TWMP is very important for vehicle comfort performance. Based on experimental, finite element, dynamic and fluid techniques, a method for identification, analysis and optimization of TWMP booming noise under high-speed airflow is proposed in this paper. The problem frequency, the noise source and the cause of booming noise inside the vehicle are identified by amplitude-frequency characteristics analysis and modal analysis. By establishing the dynamic model of damping patch, the matching method of damping patch is proposed. The simulation results are in good agreement with the experimental results, which shows that the method is correct. And the damping coefficient, attachment position and attachment area of the damping plate can be analyzed quickly and accurately by using the method, and the vibration and noise of TWMP can be reduced obviously.