阻尼（damping）.docVIP

阻尼（damping） Damping: refers to any vibration system in vibration, due to external effects and / or the system itself causes the vibration amplitude gradually decline, and the quantitative characterization of this property is called damping. Z usually n damping In electricity, its almost the meaning of response time. In the mechanical physics, the energy of the system decreases, vibration damping is not because of resistance caused by the vibration, one is due to the friction heat, the mechanical energy of system decreases, transformed into energy, this is called damping friction damping; the other one is around the particle system caused by vibration the energy of the system gradually to the surrounding radiation out into the energy of the wave, this is called radiation damping damping. Friction requires steady time! The pointer multimeter hands steady time! Linear viscous damping is the most commonly used damping model in mechanical systems. The magnitude of the damping force R is proportional to the velocity of the moving particle. In the opposite direction, it is denoted as R=-C and C is the viscous damping coefficient, and the numerical value must be determined by the vibration test. Since the mathematical solution of the linear system is simple, the other forms of damping are often converted into equivalent viscous damping in accordance with the principle that their energy losses are equal in one cycle. The motion of an object varies with the damping coefficient of the system. For example, in a vibration system with a degree of freedom, [973-01] is called the critical damping coefficient. The mass in the formula is K, and the stiffness of the spring. The ratio of the actual coefficient of viscous damping C to the critical damping factor C is called the damping ratio. Less than 1 is called damped, the object is logarithmic damped vibration; 1 is called damping, the object does not vibrate back to the equilibrium position slowly. The damping has very little infl