Abstract
The submarine mast will bend and vibrate under the impact of the current, and the serious vibration will affect the mast performance and even damage the mast. Therefore, the dynamic characteristics of submarine masts are critical in their design. In this paper, the multi-supported mast of a submarine is modeled using transfer matrix method for multibody systems (MSTMM). The element transfer equations are derived for rigid body sheet, spring, beam and rigid body sheet coupled spring, respectively. Considering the rigid body sheet and spring as one element or two independent elements, two modeling ways are proposed, and the system overall transfer equation is deduced separately. The modal superposition method is used to calculate the forced vibration response by establishing the body dynamic equations and augmented eigenvectors. Without deducing system global dynamics equation and with simplicity, efficiency and versatility. Two numerical examples are used to demonstrate MSTMM's modeling flexibility. It provided a theoretical basis for the structural analysis and optimization design of the submarine mast.
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