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首页> 外文期刊>Journal of Biomechanics >Absorption of energy during vertical whole-body vibration exposure.
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Absorption of energy during vertical whole-body vibration exposure.

机译：垂直全身振动暴露期间的能量吸收。

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摘要

Absorbed power (PAbs) during exposure to vertical whole-body vibration in a sitting posture was measured on 15 male and 15 female subjects. Different experimental conditions were applied, such as vibration level (0.5-1.4 m s(-2)) and frequency (2-100 Hz), body weight (54-93 kg) and, relaxed and erected upper body positions. Results show that PAbs was strongly related to the frequency of the vibration, peaking within the range of 4-6 Hz. The peak was predominantly located in the lower end of this range for females and for the relaxed sitting position. PAbs increased with acceleration level and body weight. Almost a ten-fold increase in PAbs was observed at the critical frequency when the vibration exposure was raised from 0.5 to 1.4 m s(-2). If risk assessment is based on the assumption that the amount of PAbs, independent of the frequency of the vibration, indicates a hazard, then the ISO-standard 2631 under- and overestimates the risk at frequencies below and above about 6 Hz, respectively. The results also indicate a need for differentiated guidelines for females and males. Many types of vehicles produce whole-body vibration with frequencies which coincide with the range where the highest PAbs was observed. PAbs is a 'new' concept for measurement of whole-body vibration exposure. Although not yet thoroughly evaluated, this measure may be a better quantity for risk assessment than those specified in ISO 2631 since it also takes the dynamic force applied to the human body into account.
机译：在15位男性和15位女性受试者上，测量了在坐姿下垂直全身振动下的吸收功率（PAbs）。应用了不同的实验条件，例如振动水平（0.5-1.4 m s（-2））和频率（2-100 Hz），体重（54-93 kg）以及放松和竖立的上身位置。结果表明，PAbs与振动频率密切相关，在4-6 Hz范围内达到峰值。对于女性和放松的坐姿，该峰主要位于该范围的下端。 PAbs随着加速度水平和体重的增加而增加。当振动暴露从0.5 s增加到1.4 m s（-2）时，在临界频率下观察到PAb几乎增加了十倍。如果风险评估基于以下假设：与振动频率无关的PAb数量表明存在危险，则ISO标准2631分别低估和高估了大约6 Hz以下和更高的风险。结果还表明需要针对男性和女性的差异化指南。许多类型的车辆会产生全身振动，振动的频率与观察到最高PAbs的范围一致。 PAbs是测量全身振动暴露的“新”概念。尽管尚未进行全面评估，但此措施可能比ISO 2631中指定的措施更好地用于风险评估，因为它还考虑了施加在人体上的动态力。

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