Original scientific paper

https://doi.org/10.21278/TOF.474044422

Analysis of Survivabilty of the Ship Propulsion System in a Severe Shock Environment, Based on the Fuzzy Theory and Analytic Hierarchy Process

Hao Wang orcid.org/0000-0003-4005-0689 ; China Institute of Marine Technology & Economy, Peking, China
Lin Gan ; Wuhan Secondary Ship Design & Research Institute, Wuhan, China

Abstract

Ship survivability is a critical aspect of the design of naval ships operating in weapon-induced shock environments. While most of studies have focused on the failure mechanisms of ship structures, little work has been done to assess the damage that may be inflicted on the propulsion systems of such vessels. This paper presents a novel model for evaluating the survivability of naval ship propulsion systems subjected to severe shock environments. The model accounts for the effects of weapon damage, including blast-induced structural crevasses and shock-induced equipment failures, by conducting the vulnerability analysis using empirical formulations for pressure and fragment perforation calculation. The proposed model consists of two sub-models: a crevasse damage sub-model and a shock damage severity sub-model. The former utilizes a fifth-order analytic hierarchy process structural model, while the latter utilizes the fuzzy theory. Combining the two sub-models yields the total survivability of the propulsion system of a naval ship. The model is applied to assess the survivability of three propulsion system design types (CODOG, CODAD, and CODAG) for a 3000 T class frigate. Results demonstrate the utility of the proposed model as a fast and robust method for use during iterative design cycles, enabling design changes based on the analysis results.

Keywords

Fuzzy theory; Ship survivability; Propulsion system; Analytic hierarchy process; Shock environment

Hrčak ID:

309417

URI

https://hrcak.srce.hr/309417

Publication date:

28.9.2023.

Visits: 829 *