Vibration characteristics of a car using transfer path analysis

Abstract

Vibration is a common issue in the automobile system, especially in an old car. Several causes that may generate vibration are vibration at idle and engine RPM. Vibration can decrease the ride comfort and become one of the contributing factors that cause an accident or emergency condition. Therefore, vibration evaluation to know the vibration characteristics of the classic car must be conducted to diagnose when and under what condition the vibration occurs. This paper aims to know the vibration level and vibration characterization of the classic car from car engine as the vibration source to some selected positions at low-frequency engine idle speed by using Transfer Path Analysis (TPA). This research used a 1991-manufactured car. Finite element calculation, simulation, and experimental modal analysis were used to determine the dynamic characteristics of the car for the natural frequencies. The natural frequencies that generated from the experimental modal analysis are convoluted by operational acceleration when the car engine was turning on which equal to operational force as transfer path analysis. In conclusion, TPA can be used to know the vibration characteristics in Noise Vibration and Harshness (NVH) issues by tracing the flow of vibration using operational force.

Rubber Stiffness Optimization for Floor Vibration Attenuation of a Light Bus Based on Matrix Inversion TPA

“…erefore, many automotive manufacturers and researchers have devoted much effort to enhance the NVH performance of automotive. Currently, the techniques to improve the NVH performance of vehicles are generally divided into numerical methods (such as multibody dynamic method [1,2] (MBD), finite element method [3] (FEM), and boundary element method (BEM)) and experimental methods [4] (such as the spectrum analysis and transfer path analysis (TPA) methods [5][6][7]); the numerical methods are usually used to analyze or predict the vibration and noise response (N&V) under some excitation sources by numerical models. However, the numerical models are established based on some condition assumptions, which cannot reflect the real conditions of a physical automotive system.…”

Research on Cab Vibration Control Based on Parameter Hierarchical Interaction Model

“…Many scholars have studied different design methods [7][8][9][10][11] of structural parameters of cab systems to improve cab vibrations, analysing balance, stability, and safety of cab systems. e most typical methods include the transfer path analysis method [12,13], the fuzzy control method [14][15][16], and modal analysis method [17,18] and so on. Chen et al [19] proposed a two-level TPA model [20][21][22] to determine the causes of the cab's higher vibration level.…”