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首页> 外文会议>AIAA SPACE conference exposition >Optimization of the Horn, Free-Mass, and Support Architecture of a Solid Ultrasonic Rock Coring System
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Optimization of the Horn, Free-Mass, and Support Architecture of a Solid Ultrasonic Rock Coring System

机译：固体超声取芯系统的号角，自由质量和支撑架构的优化

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Extracting cohesive samples from below planetary surfaces will require low mass, low reaction and low power drilling systems. Ultrasonic tools are considered to be a leading technology as they meet the above criteria, but most architectures so far proposed to deploy them require either that (i) the entire cutting gear is sent downhole and repeatedly retrieved to empty the spoil, or (ii) the transducer remains on the surface and delivers its impulses through a long lance. Retrieving the cutting gear in its entirety risks collapse of the shaft and presents control problems when reacquiring the opening, and long lances must be either assembled on-site or be limited to the dimensions of the delivery aeroshell. This paper seeks to adapt traditional ultrasonic gear such that a new architecture may be employed to avoid these problems. Thus, the basic architecture of an ultrasonic coring device is derived from the step and dog-bone horn described in the literature and optimized by a process of finite-element analysis. Examples of both horns are manufactured, tested using an experimental modal analysis technique to ensure their proper operation, and further tested using a force transducer to measure the impulse they deliver to a target through an optimized dynamic stack. The target is replaced with sandstone to ensure that the measured impulses are sufficient to penetrate rock. Finally, the layout of the optimized ultrasonic assembly is adapted such that it may be deployed by a coilable tube drillstring and thus avoid the operational difficulties described above. Mass and performance estimates are provided.
机译：从行星表面以下提取粘性样品将需要低质量，低反应和低功率的钻孔系统。超声波工具符合上述标准，因此被认为是一种领先技术，但是到目前为止，大多数建议部署超声波工具的架构都要求（i）将整个切割齿轮送入井下并反复取回以清空废料，或者（ii）换能器保留在表面上，并通过长矛杆传递其脉冲。完全取下切割齿轮可能会导致轴坍塌，并且在重新获得开口时会带来控制问题，并且长矛杆必须在现场组装，或者必须限制在交付机壳的尺寸范围内。本文力图适应传统的超声波齿轮，以便采用新的架构来避免这些问题。因此，超声取芯装置的基本结构是从文献中描述的阶梯形和狗骨形角导出的，并通过有限元分析过程进行了优化。制造两个喇叭的示例，使用实验模态分析技术进行测试以确保其正常运行，并使用力传感器进行进一步测试以测量它们通过优化的动态烟囱传递到目标的冲力。用砂岩代替目标，以确保测得的脉冲足以穿透岩石。最后，优化的超声组件的布局被适配为使得其可以由可卷绕的管钻柱展开并且因此避免了上述的操作困难。提供了质量和性能估算。

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