Study On The Automotive Interior Noise Analysis Using Meshless Method

This thesis proposed meshless method to solve the problem that there is not a mature method on the mid-frequency analysis of automotive noise analysis at present. Meshless method as a numerical analysis method has many outstanding advantages comparing with the finite element method, boundary element method and other traditional numerical methods. In recent years, domestic and foreign scholars have been made a lot of important ground-breaking results in the meshless method field. The paper tried to use meshless method for the analysis of automotive interior noise, hoping to solve the noise analysis problem of mid-frequency domain.The main research work involves:1. This paper introduced the NVH characteristics of the automobile, summarized the latest developments in NVH technology and indicated that analyzed and controlled the automotive interior noise is an important component of NVH. Through analyzing the results and progress achieved by domestic and foreign scholars in the car noise study aspect, some analysis methods such as finite element method, boundary element method and statistical energy analysis which were commonly used in the areas of automotive noise analysis were summarized. After analyzing the advantages and disadvantages of the various analysis methods in the analysis of each band of the noise inside the car in detail, this paper corresponding put forward its research content.2. Then this paper concisely introduced the research status and development trends of the meshless method, summarized the characteristics and the superiority of meshless method and described the general implementation steps. Considering this study and the characteristics of meshless method, the meshless collocation method and the meshless local Petrov-Galerkin method were selected for the analysis in this paper.3. After deriving in detail the meshless equation for the acoustic modal analysis of cavity, this paper took a car's crew module as a model, used the computer program that was written by self to analyze the acoustic mode of the crew module and validated this method through numerical calculation.4. Furthermore on the sound–structure coupling model foundation, this paper made full use the advantages of meshless method to establish a method to analyze the automotive interior mid-frequency noise using meshless method.Through this study, the meshless method was spread in the analysis of the automotive interior noise. The practical example certificated that the meshless method could be effectively used in the mid-frequency noise analysis.