Structural Static Force Analysis And Optimum Design Of High Pressure Vessel For Cng Based On Ansys

With the wide application of compressed natural gas technology, the thesis carries on the structural static force analysis and optimum design to its external dimension of a long cylindrical CNG vessel, by means of ANSYS, large-scale three-dimensional finite element analysis software., by employing several element types of ANSYS, the structural static force analysis about a long cylinder vessel for CNG is performed. Furthermore, the paper gives the optimum design about some dimensions of the simulated vessel with optimum objective of minimum weight, subjected to strength requirement.First of all, different stress is calculated in connection areas of body and seal head of the vessel. Because the geometric form of discontinuous district is coMParatively complicated, and it is difficult to calculate the result accurately with analytic method. Hence, the stress of the vessel is analyzed with three element types of ANSYS, which mainly confirmed the results each other. In addition, the outcome of its main body is coMPared to that from theory, so as to prove the whole computational process is accurate.By means of basic method of CAE which FEM and optimum technology and combine with them, optimization design is further made by PLANE82 based on project analysis and getting feasible design plan. through this course, from form optimization of the structure to the optimization choice of the design parameters, the technical indicator of product design is improved and meets all specified requirements but with a minimum expense of weight. The results indicated that the quality of head of the vessel after optimum is drop to 147.58kg from initial 158.53kg, the quality of the whole vessel is dropped form 1852.18kg to 1735.88kg, having reduced by 6.28%, and it is obvious that the optimum is remarkable.