To reduce total stress, make even stress distributing and improve design efficiency of annular U-diaphragm in hydraulic diaphragm pump, the U-diaphragm stress-strain was researched and structure was optimized by Finite Element and parameter optimization method. Diaphragm model stress distributing drawing was analyzed under different compression and stretch loads in operating space and stress distributing rule was summarized by nonlinear analysis function of finite element analysis software ANSYS. The structure of fixed, moved supported end and free semicircular transitional end were optimized based on stress distributing rule. Take diaphragm maximal stress as state limited variable and unit stress summation as objective function, parameters were calculated by parameter optimization law of ANSYS. Finite Element analysis result indicates the optimal annular U-diaphragm total stress is lower and inner and outer surface sideline stress distributing is more even to avoid stress concentration problem. It provides a kind of new structure optimization design method of diaphragm based on parameter optimization which has lower pre-investment and shorter developing circle than current trial-manufacture method.
Tan Lei，Cao Shuliang. Optimal design and numerical simulation for impeller of centrifugal pump with medium-high specific speed[J]. Journal of Drainage and Irrigation Machinery Engineering，2010, 28（4）: 282-285.