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Study on characteristics of response to nodal vibration in a main hull of a large-size ferry boat; Ogata feri no shusentai yodo oto tokusei ni kansuru kenkyu

Abstract

Demand for reduction in vibration and noise in large-size ferry boats has been severer in recent years. On the other hand, vibration exciting force in main engines and propellers is on an increasing trend in association with increase in speed and horsepower. A large-size ferry boat uses an intermediate-speed diesel engine which has high vibration exciting frequency. Therefore, discussions were given on characteristics of response to nodal vibration in a main hull induced by primary internal moment in a main engine in a large-size ferry boat mounting an intermediate speed main engine. Results of detailed vibration calculations, vibration experiments using an actual ship, and results of measurements were used for the discussions. Natural frequency for two-node vibration above and below the main hull was set for an equation of estimation such that the whole ship is hypothesized to have been structured with beams having the same cross section according to the Todd`s equation, and effect of rigidity of the long structure can be evaluated. Parameters were derived by using the minimum square method that uses the measured natural frequency of the ship A through the ship E among large-size ferry boats. The derived result may be summarized as follows: this  More>>
Authors:
Takimoto, T; Yamamoto, A; Kasuda, T; Yanagi, K [1] 
  1. Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)
Publication Date:
Apr 10, 1996
Product Type:
Conference
Report Number:
CONF-9605248-
Reference Number:
SCA: 420204; 423000; PA: NEDO-96:913883; EDB-97:015808; SN: 97001718569
Resource Relation:
Conference: 92. Meeting of West Japan Society of Naval Architects, Seibu zosenkai dai 92 kai reikai, Yamaguchi (Japan), 9-10 May 1996; Other Information: PBD: 10 Apr 1996; Related Information: Is Part Of 92nd Meeting of West Japan Society of Naval Architects. Summary of papers; PB: 180 p.; Seibu zosenkai dai 92 kai reikai. Ronbun kogai
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; VEHICLES; MARITIME TRANSPORT; SHIPS; DIESEL ENGINES; EIGENFREQUENCY; MECHANICAL VIBRATIONS; MOMENT OF INERTIA; STRUCTURAL BEAMS; PARAMETRIC ANALYSIS; LEAST SQUARE FIT; ACCELERATION
OSTI ID:
414186
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97721550; TRN: 96:913883
Availability:
Available from West Japan Society of Naval Architects, 10-1, Hakozaki 6-chome, Higashi-ku, Fukuoka, Fukuoka Prefecture, Japan; OSTI as DE97721550
Submitting Site:
NEDO
Size:
pp. 125-130
Announcement Date:

Citation Formats

Takimoto, T, Yamamoto, A, Kasuda, T, and Yanagi, K. Study on characteristics of response to nodal vibration in a main hull of a large-size ferry boat; Ogata feri no shusentai yodo oto tokusei ni kansuru kenkyu. Japan: N. p., 1996. Web.
Takimoto, T, Yamamoto, A, Kasuda, T, & Yanagi, K. Study on characteristics of response to nodal vibration in a main hull of a large-size ferry boat; Ogata feri no shusentai yodo oto tokusei ni kansuru kenkyu. Japan.
Takimoto, T, Yamamoto, A, Kasuda, T, and Yanagi, K. 1996. "Study on characteristics of response to nodal vibration in a main hull of a large-size ferry boat; Ogata feri no shusentai yodo oto tokusei ni kansuru kenkyu." Japan.
@misc{etde_414186,
title = {Study on characteristics of response to nodal vibration in a main hull of a large-size ferry boat; Ogata feri no shusentai yodo oto tokusei ni kansuru kenkyu}
author = {Takimoto, T, Yamamoto, A, Kasuda, T, and Yanagi, K}
abstractNote = {Demand for reduction in vibration and noise in large-size ferry boats has been severer in recent years. On the other hand, vibration exciting force in main engines and propellers is on an increasing trend in association with increase in speed and horsepower. A large-size ferry boat uses an intermediate-speed diesel engine which has high vibration exciting frequency. Therefore, discussions were given on characteristics of response to nodal vibration in a main hull induced by primary internal moment in a main engine in a large-size ferry boat mounting an intermediate speed main engine. Results of detailed vibration calculations, vibration experiments using an actual ship, and results of measurements were used for the discussions. Natural frequency for two-node vibration above and below the main hull was set for an equation of estimation such that the whole ship is hypothesized to have been structured with beams having the same cross section according to the Todd`s equation, and effect of rigidity of the long structure can be evaluated. Parameters were derived by using the minimum square method that uses the measured natural frequency of the ship A through the ship E among large-size ferry boats. The derived result may be summarized as follows: this equation of estimation has an estimation error of about 5% against the natural frequency for nodal vibration above and below the main hull; and this equation of estimation has an estimation error of about 30% against the acceleration in the vertical direction at the end of the stern. 2 refs., 11 figs., 1 tab.}
place = {Japan}
year = {1996}
month = {Apr}
}