Engineering Practical Development Of SOGA Software For Structural Optimization

Based on previous research works of structure optimization design, from the practical need in engineering application, summarize the experience and the shortage of integrating general FEA software with Guide-weight criteria method to develop the software SOGA for structural optimization, succeed to the mind of software developing by module structure and the indirect calculate method for analytical sensitivity of displacement, successfully solved the difficulty of solution size resulted by using interface program of ANSYS for data interchange between optimization module and analysis module.In order to break though the node limit of interface program of ANSYS, this paper adopted APDL distill the basic information and calculate the element stiffness matrix with the program developed by ourselves. We needed to know the element character and the shape function used in ANSYS very distinctly. The paper mainly studied the ANSYS inc. theory reference, achieved in programming the analytical sensitivity analysis module for plate structures and compound structures of truss and shell in plane. This has made the SOGA software more independent from ANSYS, and has swept off the drawbacks from the way to forming a universal software for structure optimization, and has made the key evolvement toward to the engineering practical use of SOGA.A well-connected compound structure of truss and plane has been optimized successfully, the results proved the work of this paper is correct and credible, and the software SOGA for structure optimization with ANSYS analyzer fully use the advantages of ANSYS and Guide-weight method, is high efficient, convenient and practical.