Utjecaj upotrebe čelika povišene čvrstoće na strukturne dimenzije glavnog rebra broda za prijevoz rasutog tereta

Gregov, Jurica (2016) Utjecaj upotrebe čelika povišene čvrstoće na strukturne dimenzije glavnog rebra broda za prijevoz rasutog tereta. = Influence of using high tensile steel in structural design of midship section of bulk carrier. Undergraduate thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Andrić, Jerolim.

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Abstract (Croatian)

Upotrebom čelika povišene čvrstoće naspram običnog brodograđevnog čelika za gradnju trupa broda može se, zavisno o opsegu primjene ostvariti znatno smanjenje mase konstrukcije. Redukcijom mase povoljno utječemo na troškove izgradnje kao i na profitabilnost broda tijekom eksploatacije. U ovom radu razmatra se utjecaj upotrebe čelika povišene čvrstoće na dimenzije strukturnih elemenata broda za prijevoz rasutog tereta i u konačnici na masu broda, ograničavajući se pritom na konstrukciju glavnog rebra i pripadajuću masu odnosno masu jediničnog volumena paralelnog srednjaka broda. Utjecaj uporabe čelika na konstrukciju broda istražen je razvojem i usporedbom varijanti modela, bazni model građen je od običnog brodograđevnog čelika ST24 ostale tri varijante uključuju različite zone uporabe čelika povišene čvrstoće (AH32 i AH36). Model u svim varijantama dimenzioniran je u skladu s relevantnim Pravilima H-CRS BC&OT ( Harmonized Common Structural Rules for Bulk Carriers and Oil Tankers). Varijante modela uspoređene su po kriterijima mase i cijene materijala uz nužno zadovoljenje uvjeta lokalne čvrstoće svih strukturnih elemenata te minimalnog zahtijevanog graničnog momenta trupa, čime se osigurava relevantnost usporedbe svih varijanti.

Abstract

The use of high-tensile steel versus mild steel in hull construction can result, respectively to the zones applied in significant mass reduction. Mass reduction is beneficial in terms of both reduced investment costs during construction and increased earning potential by increased deadweight. This paper examines the reduction in the scantlings due to high-tensile steel implementation on a bulk carrier ship and consequently the reduction of mass, concentrating on midship geometry and corresponding weight (weight of a meter long midship section). For the purpose of assessment of high tensile steel implementation influence on structural design of midship section by comparison, three different variants of a midship model (each including different zones of high tensile steel application-AH32 and AH36) were derived from the basic model of midship section (which entirely consists of mild steel ST24). Midship geometry of each model variant would be designed in accordance with the prescriptive scantling requirements of H-CRS BC & OT (Harmonized Common Structural Rules for Bulk Carriers and Oil Tankers). Model versions have been compared by the criteria of weight and cost of material. To ensure the relevance of the comparison, local strength criteria were fulfilled for all structural elements and minimum requested ultimate hull girder vertical bending moment capacity (ultimate bending moment) for each version of the model was obtained.

Item Type: Thesis (Undergraduate thesis)
Uncontrolled Keywords: brodska konstrukcija; čelik povišene čvrstoće; brod za prijevoz rasutog tereta; IACS harmonizirana združena pravila
Keywords (Croatian): ship structure; high tensile steel; bulk carrier; IACS Harmonized CSR Rules
Subjects: TECHNICAL SCIENCE > Shipbuilding
Divisions: 600 Department of Naval Engineering and Marine Technology > 640 Chair of Shipbuilding Technology
Date Deposited: 29 Feb 2016 09:25
Last Modified: 15 Mar 2016 07:44
URI: http://repozitorij.fsb.hr/id/eprint/5148

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