Design of Pressure Vessel for Undersea Applications

Author(s):

Madhavan Nampoothiri S , Naval Physical & Oceanographic Laboratory; Sajith Kumar P C, Naval Physical & Oceanographic Laboratory

Keywords:

Pressure vessel, IS: 2825-1969 Code, ASME Pressure Vessel code, Buckling Analysis

Abstract:

This paper presents the design and analysis of a pressure vessel for undersea applications. This pressure vessel is basically an electronic enclosure for the packaging of printed circuit boards, acoustic sensor, depth sensor, temperature sensor, connectors and battery. This vessel to be designed for 200m depth of operation. The external dimensions of the vessel for packaging this electronics are 550mm length and 180mm diameter. The first step in design is to determine the thickness of the vessel. Using IS: 2825-1969 Code for unfired pressure vessels the thickness is calculated for this dimensions and external pressure. The obtained thickness values were cross verified using ASME boiler and pressure vessel code. Obtained thickness is cross verified for buckling loads using numerical calculations. Further for validating these results, Eigen value buckling analysis is done using ANSYS-finite element software package for external pressure of 20 bars. The estimated thickness of the vessel obtained using IS code was 5mm. This was verified and found safe using ASME code. Buckling load numerical calculations gave an operating pressure of 127bar which is much above the required operational pressure. The buckling load multiplier predicted for the first mode is 7.21 and hence the design is safe.

Other Details:

Manuscript Id	:	IJSTEV4I8039
Published in	:	Volume : 4, Issue : 8
Publication Date	:	01/03/2018
Page(s)	:	70-76

Download Article