新型超声波钻探设备的建模分析

Modeling Analysis on a New Ultrasonic Drilling Device

摘要:

目前，对宇宙中生命迹象的探索是世界各国所关注的最重要的目标之一。美国宇航局研制了由超声波或者声波驱动器驱动的一系列超声波/声波钻头/取心器(USDC)设备，用来进行空间探测并提取岩石、冰与土壤样品，以及进行原位分析。此设备在声波频率下，超声波压电驱动器驱动中间的自由质量块，进而冲击钻头来进行采样。基于此设备的运行过程，分析了超声波激发器的原理过程，主要是自由质量块与激发器的反应过程，变幅杆顶部与自由质量块的碰撞过程，自由质量块与钻杆的碰撞过程。初步建立了USDC内部各部分相互作用的模型。

Abstract:

At present, the search for existing or past life in the universe is one of the most important objectives of international society. For this purpose, effective instruments USDC that are driven by an ultrasonic/sonic actuator are being developed to probe and sample rocks, ice and soil, and conduct in-situ astrobiology analysis. At the ultrasonic or sonic frequency, free mass driven by ultrasonic piezoelectric driver impacts to the bit to samples. The principle of ultrasonic actuator is analyzed in this paper, including the interactions of free mass and actuator, the solid horn tip and free mass, free mass and drill stem.