Research On Stress And Deformation Of Ship Section Building

Improve ship quality, reduce production costs, shorten construction time, is the shipbuilding industry to a certain stage of economic development and requirements of the inevitable result. Stress and deformation during construction control is the basis for improving the level of shipbuilding technology. So, shipbuilding in-depth study of the stress and deformation, shipbuilding process from the mechanical point of view of scientific rationality, which are in order to identify problems and find ways to improve measures for the construction process improvement and then provide a theoretical basis and technical support.Ship hull deformation is a common phenomenon in the construction process, after the hull deformation,although the aircraft through the correction plate smoothness can meet the requirements of tolerance, it would have some adverse consequences of following the course of ship construction. Weld structure, a large number of various processes used in manufacturing, from components to sub-assembly of flip chip, or even total closure of paragraph. Based on the above, there are focuses on the following three aspects of1. Hatch in the process of strain construction. Made through the hatch cover section calculation, and obtained in the realization of measurement, the hull of the stress-strain diagram, and calculated by the formula after deformation of the segment size, and compared with the allowable deviation, obtained the most sub-deformation beyond the tolerance of the conclusions.2. Multi-pass welding pipe welding numerical simulation. Detailed finite element software using simulated MSC.MARC welding Pipe Stress Field in the process of MARC-related features, unit type description, MSC.MARC heat conduction and thermal stress analysis of the finite element method and process, when the mesh model, the model assumptions and the selection of moving heat source, the determination of material properties, welding the realization of the path and fill material, detailed analysis and the results were obtained in the numerical simulation discussed paper is feasible.3. The elimination of welding residual stress. Discussed in the ship construction process to eliminate residual stresses and achieve numerical simulation of thermal tensioning method. Calculated that compared the method for elimination of residual stress.