Exact Dynamic Analysis of Viscoelastic Double-Beam System Using Dynamic Stiffness Method

Double-beam structure with a viscoelastic core has a wide range of application scenarios in engineering. To investigate the dynamic behavior of this type of structures, the dynamic stiffness method and Wittrick-Williams algorithm are employed to obtain the dynamic characteristics of the double-beam system. Besides, the modal superposition method is utilized to calculate the dynamic response. By comparing with finite element solutions, the accuracy of proposed method is verified. Results show that the damping coefficient of the connection layer and the axial tension of the upper beam have a significant effect on reducing the structural response in a certain range. The methods and conclusions in this paper will be helpful to structural design and vibration suppression of practical structures.