A Novel Ultrasonic Longitudinal-Torsional Compound Vibration Lunar Soil Water Ice Drill

Abstract Under the extremely low-temperature environment of permanent shadow crater in the lunar polar region, the hardness, mechanical strength, and bonding degree of lunar soil water ice are high, and it is difficult to realize low-consumption and high-efficiency drill by traditional digging shovels and drilling. To solve the problem, an ultrasonic longitudinal-torsional composite drill is proposed. The longitudinal-torsional vibration coupling mechanism of the slant groove is analyzed, and the modal analysis, harmonic response analysis and transient analysis of the ultrasonic drill are carried out by the method of finite element. The experiment results show that the designed ultrasonic longitudinal-torsional composite drill can effectively generate longitudinal-torsional composite vibration, which provides a new technical means for the drill of lunar soil water ice.