Analytical and Experimental Investigation of the Damping Characteristics of Bolted and Welded Structural Connections for Plates and Shells

摘要

The design of the structural connections is important from the standpoint of reducing system vibration amplitudes or enhancing joint damping capacity. A state-of-the-art review was performed and a generic experimental model was developed and constructed. The test model consists of two concentric circular cylindrical shells and four vanes connected by groups of bolts. First, a finite element model was developed and analyzed, using the MSC/NASTRAN computer program. The first analysis was a modal survey of the model to investigate dynamic characteristics of the whole system. Secondly a frequency response analysis gave the input/output relationship between an input point (excitation) and an output point (response) in the frequency domain, which depends on the damping characteristics of the structure.