Applied Mathematics and Mechanics (English Edition) ›› 2024, Vol. 45 ›› Issue (1): 85-110.doi: https://doi.org/10.1007/s10483-024-3070-7

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Dynamic performance and parameter optimization of a half-vehicle system coupled with an inerter-based X-structure nonlinear energy sink

Yong WANG1,2, Peili WANG1, Haodong MENG3, Liqun CHEN4,*()   

  1. 1 Automotive Engineering Research Institute, Jiangsu University, Zhenjiang 212013, Jiangsu Province, China
    2 Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi Zhuang Autonomous Region, China
    3 School of Automotive Engineering, Changzhou Institute of Technology, Changzhou 213032, Jiangsu Province, China
    4 Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Frontier Science Center of Mechanoinformatics, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China
  • Received:2023-05-25 Online:2024-01-01 Published:2023-12-26
  • Contact: Liqun CHEN E-mail:lqchen@shu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(12172153);the National Natural Science Foundation of China(51805216);the China Postdoctoral Science Foundation(2023M731668);the Major Project of Basic Science (Natural Science) of the Jiangsu Higher Education Institutions of China(22KJA410001);Project supported by the National Natural Science Foundation of China (Nos. 12172153 and 51805216), the China Postdoctoral Science Foundation (No. 2023M731668), and the Major Project of Basic Science (Natural Science) of the Jiangsu Higher Education Institutions of China (No. 22KJA410001)

Abstract:

Inspired by the demand of improving the riding comfort and meeting the lightweight design of the vehicle, an inerter-based X-structure nonlinear energy sink (IX-NES) is proposed and applied in the half-vehicle system to enhance the dynamic performance. The X-structure is used as a mechanism to realize the nonlinear stiffness characteristic of the NES, which can realize the flexibility, adjustability, high efficiency, and easy operation of nonlinear stiffness, and is convenient to apply in the vehicle suspension, and the inerter is applied to replacing the mass of the NES based on the mass amplification characteristic. The dynamic model of the half-vehicle system coupled with the IX-NES is established with the Lagrange theory, and the harmonic balance method (HBM) and the pseudo-arc-length method (PALM) are used to obtain the dynamic response under road harmonic excitation. The corresponding dynamic performance under road harmonic and random excitation is evaluated by six performance indices, and compared with that of the original half-vehicle system to show the benefits of the IX-NES. Furthermore, the structural parameters of the IX-NES are optimized with the genetic algorithm. The results show that for road harmonic and random excitation, using the IX-NES can greatly reduce the resonance peaks and root mean square (RMS) values of the front and rear suspension deflections and the front and rear dynamic tire loads, while the resonance peaks and RMS values of the vehicle body vertical and pitching accelerations are slightly larger. When the structural parameters of the IX-NES are optimized, the vehicle body vertical and pitching accelerations of the half-vehicle system could reduce by 2.41% and 1.16%, respectively, and the other dynamic performance indices are within the reasonable ranges. Thus, the IX-NES combines the advantages of the inerter, X-structure, and NES, which improves the dynamic performance of the half-vehicle system and provides an effective option for vibration attenuation in the vehicle engineering.

Key words: inerter, X-structure, nonlinear energy sink (NES), half-vehicle system, dynamic performance

2010 MSC Number: 

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