著者

安川 宏紀 平田 法隆 浮田 寛之

出版者

公益社団法人 日本船舶海洋工学会

雑誌

日本船舶海洋工学会論文集 (ISSN:18803717)

巻号頁・発行日

vol.17, pp.49-56, 2013 (Released:2014-01-17)

参考文献数

9

---

This paper presents a practical simulation model for ship launching taking the dynamic coupling effect of trim angle change and vertical motion into account. The motion equations were derived in three stages of sliding, lift by stern and afloat modes in launching. By solving the motion equations in three stages continuously, ship speed change, trim angle change, traveling distance, pivoting load, etc. during launching can be calculated. To obtain the validation data of the simulation method, a fullscale test was carried out to measure the ship motions during launching by a Kinematic GPS (KGPS) system. Then, three antennas for KGPS were arranged on a Chip Carrier with 191.5 m in ship length. Some parameters needed for the simulation were determined by comparing with the fullscale test result. The present simulation method is useful for capturing th ship launching behavior.

著者

安川 宏紀 平田 法隆 中村 陽昭 松本 之良

出版者

公益社団法人日本船舶海洋工学会

雑誌

日本船舶海洋工学会論文集 (ISSN:18803717)

巻号頁・発行日

no.4, pp.137-146, 2006-12

被引用文献数

6

---

A simulation method for the maneuvering motion of a towed ship in still water is presented. A 2D lumped mass method is employed for expressing the dynamics of the towing cable. The motion equations of the towed ship and the cable are derived under the assumption that the motions are defined in the horizontal plane. Motion of a towing ship is assumed to be given. As a calculation example, a towing barge with/without skegs is selected. The captive model test is carried out to capture the hydrodynamic force characteristics of the barge. Using the force characteristics, simulations are made for various towing speeds, towing cable lengths and so on. The calculated results are compared with the model test results conducted in the towing tank. The results of the slewing motion frequency, changes of heading angle and yaw rate in time domain agree well with the experiments. The present method is useful for predicting the slewing motion of towed ship.