Study On Shell System Of Sightseeing Mini-submarine

With the development of tourism, underwater tourism has become a new promising field. It is necessary to exploit one kind of sightseeing mini-submarine powered by compressed air which has simple structure and low cost, in order to make full use of water resources in the shallow water area, such as lakes, offshore and so on.In the basis of the comparison and analysis of submarine shell system both at home and abroad, it gives overall design precept of shell system in sightseeing mini-submarine, and designs the structure of shell system, which includes the following aspects:First, the shape of this submarine has been designed according to the function requirements. Also the shell and skeleton structure have been designed on the basis of shape. The thickness of shell has been determined through theoretical calculation, and the shell structure has been performed for strength check. The skeleton structure of submarine is composed of zonal circular rib and meridional rib. Finite element analysis has been done to the skeleton and shell model which is created depend on different parameters, compare with the analysis results, the best profile shape of zonal circular rib has been determined. The shell and the skeleton are connected by bolts, stress changes where bolts connect are analyzed in different thread pitch, then the best distance between bolts has been determined.Second, the suspension loop and support structure has been designed. The suspension loop structure has been designed according to force loading of actual working condition. To the suspension loop structure, strength check and Topology Optimization which target is the minimize quality have been done in maximum tensile condition, and raw material consumption has been decreased in the processing. Then, the support structure of sightseeing mini-submarine has been designed refer to structure of bathyscaphe, finite element analysis has been done to the support structure which is created depend on different parameters, then the best support structure is determined.At last, the whole Shell system model of submarine has been designed according to design results. To check the strength and rigidity of skeleton structure, finite element analysis has been done in actual staking and lifting working condition. Analysis is been done after taking how the skeleton structure support the internal equipments into account. At present, the development of sightseeing mini-submarine is still in the initial stage, so this design of shell system of sightseeing mini-submarine has important significance.