Analysis on the Pitch Response Spectra of a Catamaran with Bulb

Seo, Kwang-Cheol; Lee, Chang-Woo; Atlar, Mehmet; Lee, Gyoung-Woo; Gim, Ok-Sok

Journal of Navigation and Port Research 2013;37(5):481-486.
Published online October 31, 2013.

벌브를 가진 쌍동형 선박의 종동요 응답 스펙트럼 분석

서광철, 이창우, Mehmet Atlar, 이경우, 김옥석

Analysis on the Pitch Response Spectra of a Catamaran with Bulb

Kwang-Cheol Seo, Chang-Woo Lee, Mehmet Atlar, Gyoung-Woo Lee, Ok-Sok Gim

Abstract

In this study, a commercial seakeeping program Seakeeper, integrated into Maxsurf, which is based on the linear strip theory was employed to compare the effect of bulbous bow (with/without) on motion response characteristics in a 18-meter catamaran. The seakeeping analyses were conducted at several Beaufort wind conditions such as scale No. 3, No. 4 and No. 5 based on ITTC wave spectrum. Pitch motion response spectrum was calculated at Head sea, Head & bow sea and Beam sea as encounter angles. Hull form of a catamaran with bulb showed the maximum 20% decrease of pitch motion response as compared to that of hull form without bulb.

Key Words: ITTC 파스펙트럼 Catamaran;Hull form design;Motion response spectrum;Strip theory;ITTC wave spectrum