Structure Design and Strength Analysis of Multi-point Pressure-holding Sampler
To facilitate the acquisition of pressure-maintained sediment samples from multiple points in a wide sea area and improve the working efficiency of submersibles,a 10,000-meter-level deep-sea sediment multi-point pressure-holding sampler that can be mounted on submersibles and Remote Operated Vehicles(ROV)has been developed.This paper introduces the multi-point pressure-holding sampler in terms of material selection,design plan,structural layout,and pressure-maintaining principles.It analyzes the main pressure-holding components using elastic failure theory and finite element simulation combined with safety coefficients.The theoretical calculations are basically consistent with the finite element analysis results,verifying the rationality of the strength design of the multi-point pressure-holding sampler.At the same time,the developed pressure-holding components have been tested and verified.The test results prove that the structural strength and sealing performance of the multi-point pressure-holding sampler meet the technical requirements for full-ocean-depth pressure maintenance,confirming the feasibility of the locking seal structure.
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