船体構造解析システム構築に関する研究

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Among structural design field of ships a direct strength analysis has been prevailing steadily and it can be pointed out that a designer seems to take it for granted that FEM stress calculations become large-sized and with complicated load conditions. On the other hand, it has been generally recognized that a large-size and complicate FEM analysis is accompanied by remarkable increase in labor hours to input data preparations. Therefore, for the purpose of speeding up of direct calculation designing it has been an urgent and indispensable subject to reduce working hours and human mistakes in input data arrangements. So the authors have developed a software system with man-machine interactive interface and also with well-organized data storage structure by applying object-oriented language. The following is pointed out as main features of the developed system. 1) The developed system is built based on the object-oriented modeling technique same as a CAD system, and has strong ability to respond to modification or re-processing of structure data easily and smoothly. 2) The input interface is excellent in displaying structure model with many drawing functions and in picking up a selected object among the embedded models in the drawing, and can expect speeding up and labor-saving. 3) The developed system can take a hull form fairing result in the offset table (discrete value) or IGES data form. 4) The subdivision function of FEM meshing is provided to carry out the automatic generation of plate-type finite elements by simply ordering a target length of elements. 5) As to load data generation, the estimated result by strip-theory on water pressure distribution in regular wave can be automatically converted to the data set of the distributed pressure applied on FEM nodes.
独立行政法人海上技術安全研究所の論文
2002-06-28

船体構造解析システム構築に関する研究

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