著者

岡本 洋 田中 陽 野沢 和男 斉藤 泰夫

出版者

公益社団法人日本船舶海洋工学会

雑誌

関西造船協会誌 (ISSN:03899101)

巻号頁・発行日

no.144, pp.17-32, 1972-06-30

被引用文献数

1

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In the previous report 1), 2), the authors discussed the stopping abilities of ships equipped with controllable pitch propeller (CPP), from a viewpoint of both sea trial results and theoretical computation about transient phenomena, by using a one-dimensional equation of ship motion. They described the CPP ship's superiorities in both its easy manoeuvring of astern-going and overa11 stopping abilities. As for the results of theoretical calculation it was found that CPP stopping characteristics can be estimated enough quantitative1y. In this report, the authors describe the fluctuating characteristics of shaft revolution number at CPP crash astern test, by solving simultaneous equations in respect to ship motion and prope11er-shaft revolutional motion. Furthermore, using the about computer program, the authors investigated influence of blade changing time on fluctuation of shaft revolution, CPP blade root strain, etc. It is also very important to investigate on stopping abilities of FPP ships in order to grasp stopping abilities of CPP ships. The authors devide transient phenomena of FPP ships into five ranges and fully examine each of them from actual astern test results. Based on these results, they calculated some transient phenomena of FPP ships with computer program and compare them with actual trial data and make some simulation to find important factors of stopping abilities of FPP ships. Finally they make comparisons of stopping abilities under the same initial condition, between CPP-installed and FPP-installed ships by astern programs for them.

著者

岡本 洋 野沢 和男

出版者

公益社団法人日本船舶海洋工学会

雑誌

関西造船協会誌 (ISSN:03899101)

巻号頁・発行日

no.153, pp.23-33, 1974-06-30

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This report mainly describes the 4-quadrant characteristics of the controllable pitch propeller. Using three kinds of models of controllable pitch propellers for high speed container ship, high speed reefer and large ore carrier, we have carried out the 4-quadrant open test at Kawasaki's circulating water channel. From polynominal regression analysis using 0.7R pitch ratio, these open characteristics can be expressed with sufficient accuracy as follows: K_t, K_q = Σ__iΣ__kC_<ik>P^iJ^k Only by this regression formula, the open characteristics can be expressed irrespective of various original pitch and area ratios. In regard to stopping ability, we have solved equations of ship motion by using the characteristics obtained from the above formula and made simulation analysis, and studied effect of C.P.P. pitch angle speed, effect of F.P.P. revolution changing time, and effect of C.P.P. pitch changing pattern for the case of Ship No.1120.

著者

岡本 洋 田中 陽 野沢 和男 斎藤 泰夫

出版者

公益社団法人日本船舶海洋工学会

雑誌

関西造船協会誌 (ISSN:03899101)

巻号頁・発行日

no.140, pp.23-33, 1971-06-30

被引用文献数

1

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Recently KHI built three kinds of ships equipped with controllable pitch propeller (CPP). They are a reefer, a container and an ore/oil tanker and all of them are higher-powered ships in comparison with those built before. As speed and size of ships increase, necessity of better stopping abilities has been increased. Investigations on the stopping abilities of ships with fixed pitch propeller (EPP) have been reported in detail by many researchers, but those on CPP ships are very rare. As the first step of the investigation on the stopping abilities of ships equipped with CPP, the authors report on crash astern test results, measured at sea trial test of above mentioned ships and compare with those of FPP ships. Furthermore they show the results of computation about transient phenomena in case of CPP ships by using one dimensional equation of motion and compare them with sea trial results.