Research Article Collaborative Optimization for Torsion Beam Opening Direction and Rubber Bushing Installation Angle of Torsion Beam Suspension to Improve Frequency Response Characteristics of the Vehicle Jin Gao Faculty of Transportation Engineering, Kunming University of Science and Technology, Kunming 650500, China Correspondence should be addressed to Jin Gao; [email protected] Received 2 June 2022; Accepted 27 August 2022; Published 17 September 2022 Academic Editor: Francesco Tornabene Copyright © 2022 Jin Gao. is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. e structure of torsion beam suspension is analyzed, and based on the real vehicle, the torsion beam suspension coupled with flexible torsion beam and the multibody dynamics model of vehicle is established. e influence mechanism of torsion beam opening angle and rubber bushing installation angle on roll center and roll stiffness of suspension is systematically analyzed. Under different opening angles of torsion beam and different rubber bushing installation angles, a comparative analysis of the changes of the toe angle and camber angle is carried out when the torsion beam suspension is moved and subjected to force. Based on simulation of the sine swept steering input of vehicle, the frequency response characteristic index of vehicle is taken as the optimization objectives, the opening angle of the torsion beam and rubber bushing installation angle of the vehicle are taken as the optimization variables, and performance of the whole vehicle is optimized by using multiobjective optimization algorithm. e optimized vehicle and original vehicle are compared with the frequency response characteristics and steady-state characteristics. e results show the frequency response and steady-state characteristics of the optimized vehicle have been improved. 1. Introduction Torsion beam suspension is a more common form of vehicle rear suspension, and its characteristics have an important influence on the handling stability of the ve- hicle. When the suspension is in motion and under force, the suspension characteristics are mainly manifested as the kinematics and compliance characteristics of the suspension. e kinematics characteristic mainly refers to the change of the suspension performance when sus- pension is in motion. It mainly analyzes the wheel travel in the parallel and opposite direction. e change charac- teristics of the wheel alignment angle caused by the de- formation of the rubber bushing in the suspension are called the compliance characteristic. is paper will conduct in-depth and detailed research on the relation- ship between the torsion beam suspension structure and the kinematics and compliance characteristics, as well as the relationship with the frequency response character- istics of vehicle. ere is research about the frequency response of vehicle and suspension. Zhang et al. proposed a robust fault-tolerant output feedback control strategy with finite-frequency constraint to synchronously control the active suspension and dynamic vibration absorber (DVA) for IWM-driven Evs [1]. Liu et al. address the challenges of ride comfort improvement and in-wheel- motor vibration suppression in in-wheel-motor-driven electric vehicle [2]. At present, many experts have conducted research on torsion beam suspension. Fichera et al. used a linear method in view of component modal synthesis to represent a flexible torsion beam with a multibody model and compared and analyzed the method with the nonlinear finite element method. e final conclusion is that the Hindawi Mathematical Problems in Engineering Volume 2022, Article ID 9250064, 19 pages https://doi.org/10.1155/2022/9250064
Collaborative Optimization for Torsion Beam Opening Direction and Rubber Bushing Installation Angle of Torsion Beam Suspension to Improve Frequency Response Characteristics of the
Jun 18, 2023
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