The non-interference uniform speed rope drilling coring device is a tool for investigating samples of submarine underground leakage hydrate rock formations. In the process of coring, the penetration resistance of the shoe is large, and the rock stratum is disturbed, which results in disturbance of the rock sample's original state. In order to solve this problem, the standard core diameter is ∅72 mm and the length is the length of a single cylinder. For example, a drilling coring device with a working outer diameter d not more than 90 mm is used to optimize the size and structure of the shoe. To ensure the strength of the tube shoe, the related dimensions of the shoe were optimized using finite element analysis software, and the structure of the shoe was improved based on the optimized dimensions. The results of the size optimization are: á = 20 °, 1 1 = 13mm, and ä = 1.5mm: the structural improvement results are: the front cone surface at the lower end of the rube shoe is changed to a regular mesa, and the number of regular mesa sides is 32. The LS-DYNA dynamic simulation results show that the penetration resistance of the tube shoe after size optimization and structure improvement is significantly reduced, so the disturbance of the drilling and coring device to the rock formation is also reduced, and the quality of the sample is improved.

中文翻译：

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无扰动均匀绳索钻探取心工具管靴尺寸及结构优化研究

无干涉匀速绳索钻孔取心装置是一种用于海底地下渗漏水合物岩层样品调查的工具。在取心过程中，鞋的穿透阻力大，岩层受到扰动，导致岩样原始状态受到扰动。为了解决这个问题，标准铁芯直径为∅72mm，长度为单个圆柱体的长度。例如，使用工作外径d不大于90mm的钻孔取芯装置来优化鞋的尺寸和结构。为保证管鞋的强度，利用有限元分析软件对鞋的相关尺寸进行优化，并在优化后的尺寸基础上对鞋的结构进行改进。尺寸优化的结果是：