Naslov
REVIEW OF GAMMA FUNCTIONS IN ACCUMULATED FATIGUE DAMAGE ASSESSMENT OF SHIP STRUCTURES

Autori
Parunov, Joško ; Ćorak, Maro ; Žiha, Kalman ; Radanović, Jadranka

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
XXI. SIMPOZIJ Teorija i prakda brodogradnje (SORTA 2014) : Zbornik radova, Tehnički fakultet, Sveučilište u Rijeci, Brodogradilište Viktor Lenac , 2014. (ISBN: 978-953-6326-90-7). / Dejhalla, R. - Rijeka, 2014, 471-480

Skup
Simpozij Teorija i prakda brodogradnje (21 ; 2014)

Mjesto i datum
Baška, otok Krk, Hrvatska, 02.10.2014. - 04.10.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
fatigue damage; gamma functions; classification societies

Sažetak
Palmgren-Miner (P-M) approach is the oldest, simplest and the most frequently applied method for cumulative fatigue damage assessment of ship structures. By assuming Weibull distribution as probability distribution of stress ranges, closed-form P-M expressions for accumulated damage calculation are adopted by Ship Classification Societies. There are several versions of such expressions currently in use and all of them implement various kinds of Gamma functions. Accurate evaluation of Gamma functions is therefore of crucial importance for reliable accumulated damage calculation. However, it is noticed that fatigue rules provides insufficient attention to the precise definition of Gamma functions, causing unnecessary wasting of time and possible mistakes. The present paper gives review of expressions for accumulated damage assessment proposed by major Classification Societies aiming to clarify which kind of Gamma functions are used and how to calculate them efficiently.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja

POVEZANOST RADA