振动(vibration)是指一个质点或物体在外力作用下沿直线或弧线围绕平衡位置来回重复的运动。振动普遍存在于自然界中,与人们的工作和生活关系密切。由生产或工作设备产生的振动称为生产性振动。根据振动作用于人体的部位和传导方式,可将生产性振动分为局部振动和全身振动。局部振动常称手传振动或手臂振动,是指手部接触振动工具、机械或加工部件,振动通过手臂传导至全身。常见的存在局部振动的作业有:使用风动工具如风铲、风镐、风转、气锤、凿岩机、捣固机或铆钉机的作业;使用电动工具如电钻、电锯和电报等的作业;使 Vibration (vibration) is a particle or object under the action of an external force in a straight line or arc around the balance position back and forth movement. Vibration is widespread in nature and closely related to people’s work and life. Vibration produced by the production or work equipment is called productive vibration. According to the role of vibration on the human body parts and conduction, the production can be divided into local vibration and vibration of the whole body. Local vibration often referred to hand vibration or arm vibration refers to the hand contact vibration tools, mechanical or processing components, vibration conduction through the arm to the body. Common local vibrations include: operations using pneumatic tools such as wind shovels, picks, winds, gas hammers, rock drills, tamping machines or riveters; operations using power tools such as electric drills, chainsaws and telegraphs ;Make