id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ajst-18344	Yang, Sen	A New Design of Vibration Damping Structure for Positive Displacement Motor	2024	7	.pdf	application/pdf	5231	259	63	APS has developed a magnetorheological active vibration damper (AVD) and has demonstrated through experiments that it can improve mechanical drilling speed [5]; Li Zi feng[6] used the method of separating variables to solve the vibration model of drilling tools, and concluded that incorrect parameter selection of vibration dampers may lead to intensified vibration of downhole drilling tools; Zhang Xiaodong et al.[7] regarded drilling tools as a seven degree of freedom model and studied the influence of shock absorber installation position and stiffness on vibration isolation effect. Establishment of simplified model of drilling tools The drilling tool will be affected by coupled vibration when working downhole.	cache/ajst-18344.pdf	txt/ajst-18344.txt