The generation method of global ship structure and vibration analysis model using ship design information in initial design stage without CAD model

摘要

The present invention generates a wire structure and vibration analysis model for the structural and vibration analysis of the entire structure of the vessel regardless of ship type by using the linear information and section information, which is the design information at the initial design time of the ship without the CAD model It is about how to.;The present invention is obtained at the initial design time of a ship without a CAD model in order to generate a mesh that satisfies the constraints according to the position of the structure to be suitable for structural and vibration analysis using linear information obtainable at the initial design time of the ship. Obtaining linear data directly from the database, the linear data including possible structure information; Selectively using the linear data obtained in the step according to an analysis purpose, the hyd frame step of processing to avoid using a node placed in an unused frame among the frames for generating an analysis node in a mesh process; When loading the linear data, the "STRU" node of the "STRU" node and the "LONG" node to be loaded must be selected, and the "LONG" node is selected according to the user's intention, and there is no node in the linear data. When creating a node at a position that does not convert the node given in any frame into a curve to insert the node at the point of the desired position on the curve, and loading the linear data as the interface in the hide frame step A processing step of grouping the generated frames; When the number of nodes is the same between the frame and the frame, the mesh is generated and the mesh is always in the same normal direction at the same coordinates, and the mesh generated in the step is selected from the selected node on the model view. Creating, modifying, and deleting meshes of a shape corresponding to the number, generating a one-dimensional element such as a beam or truss according to the properties of the "LONG" node and the "STRU" node; Shading to see where the modeling of the mesh and one-dimensional elements are missing or where the mesh was created incorrectly, and by forcing distortion of the mesh to reduce the shape so that the nodes and the mesh do not overlap each other. An element generation step comprising a shrink step of identifying a place where a part or a mesh generation is wrong; Obtaining the information of the internal member using the partition information defined from the file data for linear definition and the file data for definition of the partition information for calculating the partition of the ship; Dividing necessary data and unnecessary data according to the use among the partition data obtained in the above step and using the shape information of the node appearing in the model view so that unnecessary data is not output as a resu When selecting and focusing only the partition data obtained in the tree view, generating a patch from the boundary points of the visible partitions; And generating a node by projecting the information of the node working on the hull shell plate to the patch surface created in the partition surface in the patch generation step, and generating a mesh to satisfy the information passed by the structural member of the hull shell plate. It features.