Structural Strength Analysis and Optimum Design of Deep-sea Submersible
|School||Harbin Engineering University|
|Course||Design and manufacture of ships and marine structures|
|Keywords||Bathyscaphs Cylindrical shell Structural strength Optimal Design|
21st century is the era of deep-sea exploration and development . Deep-sea manned submersibles to reach a variety of deep-sea complex environment for efficient exploration of scientific investigation and development operations of the equipment is an important technical means for human development of deep-sea . The pressure hull structure to ensure the normal work of the submersible . In this paper , the calculation method of the pressure hull structural strength , mainly divided into the following aspects : 1) In order to ensure safe and reliable the bathyscaphs structural design , validation and testing of the model test is very necessary so designed submersible scale the applicability of the model pressure test , the reliability of the calculation method of testing theory and calculation rules . 2 ) diving underwater by the great deep-water pressure , the pressure hull structure must meet the strength requirements , the pressure hull shell plating and rib stress does not exceed the allowable stress on CCS , ABS , GL unspoken norms characterization housing The strength characteristic quantities are calculated and compared with the finite element method and experimental values ??. 3 ) With the pressure hull dive depth increased, increasing water pressure , pressure hull instability and loss of the ability to continue to carry , so the stability of bathyscaphs also very important . In this paper, ABAQUS submersible non-linear buckling analysis and specifications . 4 ) opening will cause stress concentration to weaken the strength of the structure . Partially perforated structural check , the site of insufficient strength to be strengthened in order to ensure the structural safety of the submersible . 5 ) submersible , pressure cylindrical shells under water pressure caused by the alternating load , may lead to fatigue failure . Especially in a large part of the tensile stress could easily cause a fatigue crack . In order to ensure the safe use of the submersible , submersible structure fatigue life analysis . In this paper, epsilon - N curves and linear fracture mechanics calculations Submersible Pressure Structure of the fatigue life , and by the calculation, and concluded . 6 ) typical ribbed cylindrical shell cabin structure as the research object , the weight of the casing as the objective function , using the analytical method and finite element analysis method , under the premise to ensure structural strength and stability of the latent bathyscaphs the weight of the structure optimization calculation .