Enhanced lumped parameter modeling of seated humans for coupling vibration response analysis

IF 4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Acta Mechanica Sinica Pub Date : 2026-07-21 DOI:10.1007/s10409-026-25407-x

Wei Ding (, ), Leizhi Wang (, ), Zhaobo Chen (, ), Hongrui Ao (, ), Hui Yan (, ), Zhitong Li (, )

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引用次数: 0

Abstract

During vehicle operation, road-induced vertical vibrations excite coupled whole-body dynamic responses in occupants, resulting in ergonomic concerns such as motion-induced fatigue and diminished comfort. This study develops lumped parameter models with multiple degrees of freedom to systematically investigate the formation mechanism of coupling responses in seated humans under vertical excitation, thereby overcoming the limitations of conventional single-axis models. Three stiffness and damping distribution patterns (Models A, B, and C) are proposed based on biomechanical characteristics. Parameter identification demonstrates that the linear dynamic properties of the torso (Model B) predominantly govern the frequency-domain characteristics of the coupling response. Moreover, an enhanced model (Model D) is introduced, for the first time, to quantitatively analyze the effect of a natural forward-leaning posture (head α₁=9.0°, upper torso α₂=15.1°) on coupling vibrations in a seated position. Frequency-domain analysis indicates that the human body exhibits globally coordinated motion below 3.5 Hz, whereas local organ resonances prevail above 6 Hz. Simulations reveal that a 15° backrest support angle can reduce fore-and-aft seat-to-head transmissibility by 87.2% without impairing vertical vibration reduction. This study offers theoretical insights and design principles for vibration suppression in vehicle seat systems, contributing substantially to the enhancement of ride comfort and occupant health protection.

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基于耦合振动响应分析的坐式人的改进集总参数建模

在车辆运行过程中，道路诱导的垂直振动激发了乘员的耦合全身动态响应，导致人体工程学问题，如运动诱导的疲劳和舒适性降低。本研究建立了多自由度的集总参数模型，系统地研究了垂直激励下人体坐姿耦合响应的形成机制，从而克服了传统单轴模型的局限性。基于生物力学特性，提出了三种刚度和阻尼分布模式（模型A、B和C）。参数辨识表明，躯干的线性动态特性（模型B）主要控制耦合响应的频域特性。此外，首次引入增强模型（模型D），定量分析了自然前倾姿势（头部α1=9.0°，上半身α2=15.1°）对坐位耦合振动的影响。频域分析表明，人体在3.5 Hz以下表现出全局协调运动，而局部器官共振在6 Hz以上普遍存在。仿真结果表明，在不影响垂直减振的情况下，15°的靠背支撑角度可使前后座椅对头部的传递率降低87.2%。该研究为汽车座椅系统的振动抑制提供了理论见解和设计原则，对提高乘坐舒适性和保护乘员健康具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Mechanica Sinica 物理-工程：机械

CiteScore

5.60

自引率

20.00%

发文量

1807

审稿时长

4 months

期刊介绍： Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics