Leizhi Wang

Harbin Institute of Technology

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Xiong Zhang

Chinese Academy of Sciences

Wenjie Liu

Guangdong University of Technology

Kai Wang

Institute of Electrical Engineering

Jie Sun

Tianjin University

Xianzhong Sun

University of Chinese Academy of Sciences

Yuliang Cao

Wuhan University

Sha Yi

Institute of Electrical Engineering

Wei Ding

Shandong University

Zhanxu Yang

Liaoning Shihua University

Hui Yan

Harbin Institute of Technology

Cooperative Institutions

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Institute of Electrical Engineering

Harbin Institute of Technology

Qilu University of Technology

Dalian Institute of Chemical Physics

Wannan Medical College

First Affiliated Hospital of Wannan Medical College

Tianjin University

Wuhan University of Technology

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Cationic intermediates assisted self-assembly two-dimensional Ti3C2T /rGO hybrid nanoflakes for advanced lithium-ion capacitors

Science Bulletin (2021)

Sha Yi Leizhi Wang Xiong Zhang Chen Li Wenjie Liu

MXenes

10.1016/j.scib.2020.12.026

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Vibration reduction of human body biodynamic response in sitting posture under vibration environment by seat backrest support

Scientific Reports (2024)

Wei Ding Leizhi Wang Zhaobo Chen Hongrui Ao Hui Yan

Abstract Four-degree-of-freedom (4-DOF) human–chair coupling models are constructed to characterize the different contact modes between the head, chest back, waist back and backrest. The seat-to-head transfer ratio (STHT) is used as an evaluation metric for vibration reduction effectiveness. The simulated vibration reduction ratio of the model is close to the experimental results, which proves the validity of the model. The peak STHT is obviously reduced (P < 0.05, T-test) with seat-backrest support. The experiments show that supporting the head ( $${a}_{1}$$ a 1 , P < 0.05, Wilcoxon matched-pairs signed ranks) has the best vibration reduction effect (21%), supporting the chest back ( $${a}_{2}$$ a 2 , P < 0.05) has a reduced effect (11%), and supporting the waist back ( $${a}_{3}$$ a 3 , P < 0.05) has the weakest effect (4%). When the upper torso is in full contact with the backrest, the peak STHT curve and resonance frequency are positively correlated with the contact stiffness of the seat surface and negatively correlated with the contact damping. In order to reduce the seat-to-head transfer ratio, the lowest STHT peak and lowest total energy judgments were proposed as the selection methods for the selection of the contact stiffness and damping of the backrest in two environments (periodic and non-periodic excitation), respectively.

Torso

Whole body vibration

10.1038/s41598-024-56109-y

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