In-Line Transmissibility of the Human-Seat System Exposed to Fore-and-Aft and Vertical Vibration: Effects of Large Backrest Inclination, Fore-and-Aft Seat Position and Excitation Magnitude

IF 1.8 4区工程技术 Q3 ENGINEERING, MECHANICAL

Experimental Techniques Pub Date : 2026-01-09 DOI:10.1007/s40799-025-00856-8

J. Wu, L. Zhang, D. Meng, Y. Tang, W. Li, K. Pei, Z. Zhang

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引用次数: 0

Abstract

With the advancement of autonomous driving levels, occupants in intelligent cockpits increasingly adopt large-backrest-inclination postures, necessitating systematic analysis of human-seat system dynamics under non-traditional sitting configurations. This study methodically investigated the effects of backrest inclination (120°, 130°, 140°, 150°), fore-and-aft seat position (front-end, central, back-end positions along the slide rail), and excitation magnitude (0.25 m/s², 0.5 m/s², 1 m/s²) on the in-line vibration transmissibility of the human-seat system through vibration platform tests. Based on experimental data from 12 subjects exposed to dual-axis (fore-and-aft/vertical) random vibration within the frequency range of 0.5–50 Hz, it was demonstrated that increased backrest inclination significantly attenuates low-frequency (0–5 Hz) fore-and-aft and high-frequency (15–50 Hz) vertical vibration at the backrest and headrest, while enhancing low-frequency vertical and high-frequency fore-and-aft vibration. Backward seat displacement promotes relaxation of the thigh musculature, resulting in a decrease in the resonance frequencies of thigh fore-and-aft and vertical in-line transmissibility. The resonance frequency and peak transmissibility of the human-seat system generally decrease as excitation magnitude increases, caused by the nonlinear softening of the whole-body musculature.

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人座系统在前后和垂直振动下的在线传递率：大靠背倾角、前后座椅位置和激励幅度的影响

随着自动驾驶水平的提高，智能驾驶舱内的乘员越来越多地采用大靠背倾斜姿势，因此有必要对非传统坐姿下的人座系统动力学进行系统分析。本研究通过振动平台试验，系统研究了靠背倾角（120°、130°、140°、150°）、座椅前后位置（沿滑轨的前、中、后位置）和激励幅度（0.25 m/s2、0.5 m/s2、1m /s2）对人座系统在线振动传递性的影响。基于12名受试者在0.5 ~ 50 Hz的双轴（前后/垂直）随机振动条件下的实验数据，结果表明，靠背倾角的增加显著减弱了靠背和头枕的低频（0 ~ 5 Hz）前后和高频（15 ~ 50 Hz）垂直振动，增强了低频垂直和高频前后振动。椅背向后移位促进大腿肌肉组织松弛，导致大腿前后共振频率和垂直直线传导率降低。由于全身肌肉组织的非线性软化，人体座椅系统的共振频率和峰值透射率普遍随着激励幅度的增大而降低。

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来源期刊

Experimental Techniques 工程技术-材料科学：表征与测试

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

5.2 months

期刊介绍： Experimental Techniques is a bimonthly interdisciplinary publication of the Society for Experimental Mechanics focusing on the development, application and tutorial of experimental mechanics techniques. The purpose for Experimental Techniques is to promote pedagogical, technical and practical advancements in experimental mechanics while supporting the Society''s mission and commitment to interdisciplinary application, research and development, education, and active promotion of experimental methods to: - Increase the knowledge of physical phenomena - Further the understanding of the behavior of materials, structures, and systems - Provide the necessary physical observations necessary to improve and assess new analytical and computational approaches.