A human-sensitive frequency band vibration isolator for heavy-duty truck seats

doi:10.1007/s10483-024-3177-8

Abstract

Abstract:

In this study, a human-sensitive frequency band vibration isolator (HFBVI) with quasi-zero stiffness (QZS) characteristics for heavy-duty truck seats is designed to improve the comfort of heavy-duty truck drivers on uneven roads. First, the analytical expressions for the force and displacement of the HFBVI are derived with the Lagrange equation and d'Alembert's principle, and are validated through the prototype restoring force testing. Second, the harmonic balance method (HBM) is used to obtain the dynamic responses under harmonic excitation, and further the influence of pre-stretching on the dynamic characteristics and transmissibility is discussed. Finally, the experimental prototype of the HFBVI is fabricated, and vibration experiments are conducted under harmonic excitation to verify the vibration isolation performance (VIP) of the proposed vibration isolator. The experimental results indicate that the HFBVI can effectively suppress the frequency band (4-8 Hz) to which the human body is sensitive to vertical vibration. In addition, under real random road spectrum excitation, the HFBVI can achieve low-frequency vibration isolation close to 2 Hz, providing new prospects for ensuring the health of heavy-duty truck drivers.

Key words: human-sensitive frequency band, quasi-zero stiffness (QZS), heavy-duty truck seat, real random road spectrum, low-frequency vibration isolation

2010 MSC Number:

70L05

Qingqing LIU, Shenlong WANG, Ge YAN, Hu DING, Haihua WANG, Qiang SHI, Xiaohong DING, Huijie YU. A human-sensitive frequency band vibration isolator for heavy-duty truck seats. Applied Mathematics and Mechanics (English Edition), 2024, 45(10): 1733-1748.

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