A data processing system for seakeeping tests has been provided in IHI Seakeeping and Maneuvering Tank. The test data are analysed by on-line in real time, and the results are printed out on a printer and plotted on a drum type plotter immediatley after the tests. The followings are contained in the analysing programs developed for the present system. Amplitude and phase analysis for tests in regular waves ; determining the coefficients of derivatives in equations of motions by vertical and lateral foced oscillation test; determining the roll damping coefficients by free rolling test; spectrum analysis in irregular waves. A method using the leakage effect in Fourier transformation is developed to determine the basic frequency used for analysing reasonably the test data in regular wave which contains irregular high frequency noises. This report introduces the softwares and hardware assembling the above system. (Wassmann)


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    Title :

    Data analysis system for seakeeping tests in IHI seakeeping and maneuvering tank


    Additional title:

    Messwertverarbeitungssystem fuer Seetuechtigkeitsversuche im IHI Seetuechtigkeits- und Manovertank


    Contributors:


    Publication date :

    1980


    Size :

    6 Seiten, 6 Bilder, 2 Tabellen, 7 Quellen


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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