Wave Analysis of Three-dimensional Beam Structures Considering Joint Stiffness

Abstract

In structural design, natural vibration must be appropriately considered. One of the most commonly used prediction methods for natural vibration is finite element analysis frameworks. However, the FEA frameworks cannot clarify the natural vibration formation process because the natural vibration is directly computed using mass and stiffness matrices. On the other hand, the wave analysis frameworks can visualize the eigenmode formation process. Therefore, this paper computes the natural vibration formations of three-dimensional beam structures considering joint stiffness. The natural vibration formation is discussed using computed waves. The waves indicate that the natural vibration can be designed by the joint stiffness based on local transmission and reflection properties.