Quantitative Research on Contribution Degree of Vibration Affecting Factors of Vehicle Suspension System Based on Robustness Analysis

Introduction

Ride comfort is one of the main contents of research and development in automotive engineering it is necessary to find and analyze the main components and key factors affecting ride comfort in order to improve the ride comfort of automobiles, then, aiming at the key influencing factors of the main components, targeted control measures and methods are adopted to improve the ride comfort quality of automobiles. Because there are many factors affecting vehicle ride comfort, and each factor has a different degree of impact on vehicle ride comfort, it is particularly important to find out the key factors among various factors. At present, many researchers and institutions have mainly studied the vibration and noise sources of automobile suspension system from qualitative analysis, and put forward corresponding control measures and methods, quantitative research on the influencing factors of automobile vibration and noise is rarely reported.

In previous studies, researchers usually focused on the qualitative analysis of the factors affecting vehicle vibration, but neglected the quantitative study of the contribution of each factor to the vibration. Because of the lack of quantitative analysis data of vibration influencing factors, designers cannot judge the contribution of each factor to vibration; Because of the complexity of each factor and the numerous factors affecting vehicle vibration, the key factors may be omitted in the design of selective control measures for vibration influencing factors. Therefore, in order to accurately control the influencing factors of automobile vibration, the paper puts forward the quantitative research method of the influencing factors of automobile vibration, which is to find out the quantitative data of the contribution degree of the influence on automobile vibration, so as to determine which factors are the main factors affecting automobile vibration and the proportion, providing reliable quantitative data for precise implementation of vehicle vibration control.

Therefore, how to quantitatively explore the main factors affecting vehicle vibration and noise, and provide precise data for its control is particularly significant. As the suspension system is the main component affecting the comfort of the automobile, the optimization of suspension parameter is very important in the automobile R&D, so this paper chooses the automobile suspension system as the object of study. Based on the robustness analysis method, the main factors affecting the vibration of suspension system are found, and the flow chart of the vibration robustness analysis of the influencing factors of suspension system is constructed on the basis of neglecting the minor factors, power Spectrum of Class A road is used as input excitation source of suspension system simulation model, change the stiffness and damping characteristics of the front and rear suspensions, using L₉ (3⁴) experiment design scheme, the vibration weighted acceleration root mean square simulation experiment of suspension system is carried out under the influence of multiple factors, through the visualization and variance calculation of the suspension system simulation data, the quantitative analysis results of the contribution of the changes of rear suspension stiffness, front suspension damping, front suspension stiffness and rear suspension damping to the weighted acceleration root mean square of the suspension system are obtained. This conclusion provides a reference for the study of vibration control of the automobile suspension system.