Design and Forced Vibration Experiment Study of the Elastic Beam Structure with an Intelligent Boundary

Abstract

This paper attaches importance to the design and manufacturing of a type of intelligent boundary for vibration control of the elastic beam structure. Artificially set as 12 working states in this study, the intelligent boundary consists of the executing element and the control element. The equivalent stiffness coefficients of the intelligent boundary under each working state are obtained through the experiment. The study on the influence imposed by the intelligent boundary on the forced vibration responses of the elastic beam structure is carried out through the experiment. Based on this work, the equivalent stiffness of the intelligent boundary can be effectively controlled through the change to its working state. The adjustment to the range for the stiffness coefficients of the intelligent boundary can be conducted by changing the line diameter of the springs. In the effective working region, the change to the working states of the intelligent boundary imposes a significant influence on the vibration responses of the elastic beam structure, where an appropriate working state of the intelligent boundary effectively suppresses the vibration at the boundary of the elastic beam. The intelligent boundary can control the vibration of the elastic beam structure through the change to its boundary condition. The control flow of the intelligent boundary is proposed to improve the engineering acceptance of the intelligent boundary.