仰卧人体在三轴单向全身振动激励下的振动传递特性  

Transmissibility of supine human body exposed to tri-axial unidirectional whole-body vibration

作　　者：陈晨旭 邱毅 刘迟[1] 郑旭[1] CHEN Chenxu;QIU Yi;LIU Chi;ZHENG Xu(Zhejiang University,College of Energy Engineering,Hangzhou 310027)

机构地区：[1]浙江大学能源工程学院,杭州310027

出　　处：《声学学报》2024年第2期202-208,共7页Acta Acustica

摘　　要：研究了人体仰卧姿态下,振动的幅值大小和输入方向对人体头部和胸部振动传递率的影响。分别采用频率范围为0.5~20 Hz,振动幅值为0.2~0.8 m/s^(2)r.m.s.的纵向、横向和垂直单轴随机振动激励,测量了12名男性被试者自振源至头部和胸部的振动传递特性。结果表明,人体头部和胸部振动传递率的共振频率在纵向方向上大约为4 Hz,在横向方向上大约为2.4 Hz,而在垂直方向上头部和胸部传递率的共振频率并不相同。在纵向激励下,仰卧人体各部位振动传递率随振幅变化而表现出的非线性特征最为明显。This experimental study aimed to explore the effect of vibration magnitude and direction on the transmissibilities to different locations of the body in a supine posture.The transmissibilities to the head and chest of a group of 12 male subjects were measured using single-axis random vibrations(0.25-20 Hz)in the fore-and-aft,lateral,and vertical directions at four magnitudes(0.2,0.4,0.6,and 0.8 m/s^(2) r.m.s.).It was revealed that the resonance frequency in the transmissibility to each location of the human body was similar at approximately 4 Hz in the fore-and-aft direction and at about 2.4 Hz in the lateral direction.However,the resonance frequency in the transmissibility to each body location was found different in the vertical direction.The results also showed that the nonlinear characteristics of various parts of the supine human body are the most obvious under the fore-and-aft excitation.

关 键 词：仰卧人体 全身振动 传递率 非线性 

分 类 号：O32[理学—一般力学与力学基础]