A Method of Dynamic Parameter Identification of the Joint Surface based on Acceleration and its Application
Abstract
The acceleration sensor is easy to install and can be applied to the measurement of complex mechanical structure. In this paper, a new method for the identification of dynamic stiffness and damping of the unit with acceleration is proposed, the experimental verification of the method is correct, and then the effect of the vibration frequency and the normal pressure on the dynamic stiffness and damping of the joint surface is analyzed. Analytical results show that, the vibration frequency has little effect on the dynamic stiffness of the joint surface, but the damping effect on the surface is relatively strong. As the exciting frequency becomes less, the damping value of the excited frequency is smaller with the increase of the excitation frequency, and the combination with the increase of the vibration frequency and the damping value of the combined surface tends to be flat and has a nonlinear point. The influence of surface pressure on the dynamic stiffness of the joint surface is small, and the damping effect on the joint surface is relatively strong. When the surface pressure is very small, the damping value of the surface pressure is decreased fast with the increase of the vibration frequency; when the surface is with large pressure, the damping value of the combined surface tends to be flat with the increase of the vibration frequency.
Keywords
the joint surface; parameter identification; dynamic stiffness; damping
DOI
10.12783/dtcse/iccae2016/7222
10.12783/dtcse/iccae2016/7222
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