Spatial resonance in a small artery excited by vibration input as a possible mechanism to cause hand-arm vascular disorders

详细信息    查看全文

• 作者：Shrikant Pattnaik¹ ; Rupak Banerjee ; Jay Kim ; ^{jay.kim@uc.edu}
• 刊名：Journal of Sound and Vibration
• 出版年：2012
• 出版时间：9 April 2012
• 年：2012
• 卷：331
• 期：8
• 页码：1951-1960
• 全文大小：653 K

文摘

Hand-arm vibration syndrome (HAVS) is collectively a vasospastic and neurodegenerative occupational disease. One of the major symptoms of HAVS is vibration white finger (VWF) caused by exaggerated vasoconstriction of the arteries and skin arterioles. While VWF is a very painful and costly occupational illness, its pathology has not been well understood. In this study a small artery is modeled as a fluid filled elastic tube whose diameter changes along the axial direction. Equations of motion are developed by considering interactions between the fluid, artery wall and soft-tissue bed. It is shown that the resulting wave equation is the same as that of the basilar membrane in the cochlea of mammals. Therefore, the artery system shows a spatial resonance as in the basilar membrane, which responds with the highest amplitude at the location determined by the vibration frequency. This implies that a long-term use of one type of tool will induce high-level stresses at a few identical locations of the artery that correspond to the major frequency components of the tool. Hardening and deterioration of the artery at these locations may be a possible cause of VWF.