Preispitivanje zajedničkih propisa za procjenu granične čvrstoće brodskog trupa

Žiha, Kalman and Parunov, Joško and Ćorak, Maro (2010) Preispitivanje zajedničkih propisa za procjenu granične čvrstoće brodskog trupa. = The CSR ship hull girder ultimate strength check procedure revisited. In: XIX. simpozij Teorija i praksa brodogradnje, in memoriam prof. Leopold Sorta = The 19th symposium Theory and practice shipbuilding, in memoriam prof. Leopold Sorta, 07-09.10.2010., Split, Lumbarda; Croatia.

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Abstract (Croatian)

Ovaj tehnički prikaz najprije podsjeća na idealizirano elasto-plastično modeliranje granične čvrstoće strukturnih elemenata. Potom daje preglede postupaka za procjenu granične čvrstoće brodskog trupa podržane u zajedničkim propisima za konstrukciju Common Structural Rules (CSR) i one dane u standardima američke naftne industrije American Petroleum Institute (API). U nastavku se uspoređuju idealizirane procjene prema naprezanju tečenja preporučene od strane API-579 standarda i prema minimalnom naprezanju popuštanja prema CSR. Na kraju, dva su pristupa zasebno primijenjena u procjeni granične čvrstoće trupova pet nedavno izgrađenih tankera i tri broda za rasute terete primjenom preporučenog pojednostavljenog iterativno-inkrementalnog postupka i to provedbom sa programom MARS. U radu su pokazani i udjeli izvijanja i plastičnog popuštanja u ukupnoj graničnoj čvrstoći brodskog trupa. Zaključak je ovog ispitivanja da postoje značajne zalihe u graničnoj čvrstoći brodskog trupa obzirom na različite procjene koje daje idealizirani računski postupak preporučen zajedničkim propisima.

Abstract

This technical note firstly reminds on the idealized elastic-plastic modeling of the ultimate strength of structural elements. Next it reviews the ultimate strength assessment procedures for the ship’s hull supported by the Common Structural Rules (CSR) and by the American Petroleum Institute (API) standards. In the continuation the study compares the idealized ultimate strength assessments according to the flow stress approach recommended by the API-579 standards and the minimal yield strength approach as it is adopted by the CSR. At the end, the two approaches are separately applied to recently build five tankers and three bulk carriers following the simplified iterative-incremental method for ultimate strength assessment of the ship hull girder implemented in the program MARS. The paper indicated the differences in participation of buckling and plastic yielding in the total ultimate bending strength of the hull girder. The conclusion is that there are significant potential reserves in the hull girder ultimate strength with respect to the various assessments based on the idealized computational procedure recommended by the CSR.

Item Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	brodski trup; zajednička pravila za trup; API standardi; granična čvrstoća
Keywords (Croatian):	ship hull; common structural rules; API standards; ultimate strength
Subjects:	TECHNICAL SCIENCE > Shipbuilding
Divisions:	600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design 600 Department of Naval Engineering and Marine Technology > 640 Chair of Shipbuilding Technology
Indexed in Web of Science:	No
Indexed in Current Contents:	No
Date Deposited:	19 May 2015 09:22
Last Modified:	04 Oct 2017 12:24
URI:	http://repozitorij.fsb.hr/id/eprint/4186

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