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Metal bellows are elastic vessels that can be compressed when pressure is applied to outside of the vessel, or extended under vacuum. This is the mechanical device with wide range of applications due to its characteristic nature in absorbing energy and displacement in the structure. Structures are like bridges, industrial actuators, piping systems etc. These are widely use in aeronautical domains and medical applications. This paper is based on the objective as to investigate the numerical and analytical approach on the effect of dynamic characteristics of metal expansion bellows. U-shaped bellows having 6 and 7 convolutions are taken as specimen for analysis to find axial natural frequencies. Analysis is carried out by using MATLAB software for performing numerical analysis based on existing mathematical model proposed in a research paper [1] and ANSYS15 is used for performing modal analysis. Considering different end conditions for analysis, the comparative results of numerical (MATLAB) and analytical (FEA) analysis shows a very close match.

Numerical and Analytical Investigation on the Effect of Dynamic Characteristics of Metal Expansion Bellows