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为了明确使用振动性工具工人的循环紊乱与剪应力的关系,对由机机械振动而引起的动脉剪应力的增强进行了调查。根据最近资料证明,某些动脉壁的生理机能,是受动脉壁切力影响的,而且一定程度的剪力,如约1000达因/平方厘米,即可使内膜损伤。振动对动脉壁切力的影响是可以算出的。在典型的动脉血流,半振幅为2.5厘米,频率为20赫兹的振动性工具,如衰减其振动冲击50％时,剪应力可超过1200达因/平方厘米。不论在所谓职业性雷诺现象或使用振动性工具所引起的疾病过程,很明显的都有很多复杂的问题。现在探讨一个动脉生理学的新问题,它可能是全病程中的一个重要部分,即动脉
In order to clarify the relationship between cyclic disturbance and shear stress of workers using vibrating tools, the enhancement of the shear stress of the artery caused by mechanical vibration of the machine was investigated. According to recent evidence, the physiological function of certain arterial walls is influenced by the wall shear force of the artery, and a certain degree of shear, such as about 1000 dyne / cm 2, can damage the intima. The effect of vibration on the wall shear force can be calculated. In a typical arterial bloodstream, a vibratory tool with a 2.5 cm half-amplitude and a 20 Hz frequency can shear more than 1,200 dyne / cm², for example, by attenuating 50% of its vibrational impact. Clearly, there are many complex issues whether in the process of disease caused by the so-called occupational Reynolds phenomenon or the use of vibratory tools. Now to explore a new issue of arterial physiology, it may be an important part of the whole course of the artery