<p>Torpedo is a self-propelled weapon. It can be launched above or below the water surface. Torpedo’s different internal parts are housed in cylindrical, conical and spherical shell structures. Underwater applications require the minimization of the structural weight of shell structure for increased buckling strength, speed, and operating distance. To serve this purpose lightweight material such as Al-Cu alloy is preferred for the manufacturing of torpedo’s cylindrical shell. Here in the present investigation, only the unstiffened cylindrical shell structural member of the torpedo is considered for the evaluation of its linear buckling strength when the torpedo is subjected to hydro-static pressure under the seawater. Also, Linear buckling analysis which is also called Eigen buckling analysis is done on the unstiffened cylindrical shell geometry by using ANSYS 14.5 software also. The results obtained for their linear buckling strength from empirical equations mentioned in PD5500 are validated with those results from ANSYS 14.5 and are observed to be closer to each other. The variation of the failure strength of the unstiffened cylindrical shell due to buckling for the variation of its thickness is also observed using both approaches and the corresponding plots are drawn. And also the critical buckling pressures of an unstiffened cylindrical shell with constant thickness for the formation of a different number of lobes with simply supported boundary conditions are calculated by using empirical relations and their variation is observed and the corresponding plot is drawn. These analyses are done by considering numerical examples.</p>

Buckling Analysis of Torpedo’s Cylindrical Shell

Paper Proceedings: https://asmedigitalcollection.asme.org/OMAE/OMAE2021/volume/85116

OMAE 2021

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