Naslov
Measurement of vibrational forces and brace attachment stiffnesses of ship's engine top braces

Autori
Lozina, Željan ; Đukić, Predrag

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

Izvornik
15. Danubia-Adria Symposium on Experimental Methods in Solid Mechanics - Extended summaries / - Bertinoro, 1998, 197-198

Skup
15. Danubia-Adria Symposium on Experimental Methods in Solid Mechanics

Mjesto i datum
Bertinoro, Italija, 30.09.1998. - 03.10.1998

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
vibrational forces; FFT; attachment stiffnesses

Sažetak
Vibrational forces in engine top braces(lateral support rods), and brace point of attachment (POA) vibrational accelerations were measured during the sea trial of 40000 tons bulk carrier wessel. On the two previously built sister ships, engine braces had cracked on several occasions. Uneven distribution of vibrational forces as the result of unequal POA stiffnesses was considered as one of the factors contributing to the failure. Results of analysis of previously measured and calculated data in time and frequency domain showed H vibrations unevenly distributed on 4 motor braces. Only slight force differencies were observed on previous ships, but shipyard decided to make stiffness of the structure behind brace POAs more uniform. These new measurements were expected to confirm the desired results and optionally, to point out any problem that was overlooked in previous measurements.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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