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首页> 外文期刊>Journal of Biomechanics >The apparent mass of the seated human exposed to single-axis and multi-axis whole-body vibration.
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The apparent mass of the seated human exposed to single-axis and multi-axis whole-body vibration.

机译：坐着的人在单轴和多轴全身振动下的表观质量。

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摘要

Most workplaces where workers are exposed to whole-body vibration involves simultaneous motion in the fore-and-aft (x-), lateral (y-) and vertical (z-) directions. Previous studies reporting the biomechanical response of people exposed to vibration have almost always used single-axis vibration stimuli. This paper reports a study where apparent masses of 15 subjects were measured whilst exposed to single-axis and tri-axial whole-body vibration. Each subject was exposed to 28 vibration conditions comprising every combination of single-axis and tri-axial vibration with magnitudes of 0.4 and 0.8ms(-2) r.m.s. in each direction, once with backrest contact and once without backrest contact. Results show that increasing the magnitude of vibration in directions orthogonal to that being measured affects the apparent mass, causing a reduction in the resonance frequency as the total magnitude of vibration increases. It is demonstrated that the apparent mass resonance frequency is a function of the total vibration magnitude in all axes rather than a function of the vibration magnitude in the direction being measured. It is also shown that, for individuals, the frequency of the peak in the apparent mass in one direction is not related to the frequency of the peak in another direction. It is concluded that more complex biomechanical models are required in order to simulate human response to multi-axis vibration.
机译：大多数工作人员遭受全身振动的工作场所都涉及前后（x-），横向（y-）和垂直（z-）方向的同时运动。先前的研究报告了受到振动的人的生物力学响应，几乎总是使用单轴振动刺激。本文报道了一项研究，该研究在暴露于单轴和三轴全身振动的同时测量了15位受试者的表观质量。每个受试者都受到28种振动条件的影响，包括单轴振动和三轴振动的每种组合，幅度分别为0.4和0.8ms（-2）r.m.s。在每个方向上，一次有靠背接触，一次没有与靠背接触。结果表明，在与被测方向正交的方向上增加振动量会影响视在质量，并随着总振动量的增加而降低共振频率。已经证明，表观质量共振频率是所有轴上总振动量的函数，而不是被测量方向上的振动量的函数。还显示出，对于个人而言，在一个方向上的表观质量中的峰的频率与在另一个方向上的峰的频率无关。结论是，为了模拟人类对多轴振动的响应，需要更复杂的生物力学模型。

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