id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
fumecheng-11486	He, Ji-Huan; Yang, Qian; He, Chun-Hui; Alsolami, Abdulrahman Ali	PULL-DOWN INSTABILITY OF THE QUADRATIC NONLINEAR OSCILLATORS	2023	10	.pdf	application/pdf	3249	194	60	Yeasmin, I.A., Rahman, M., Alam, M., 2021, The modified Lindstedt–Poincare method for solving quadratic nonlinear oscillators, Journal of Low Frequency Noise, Vibration and Active Control, 40(3), pp. 1351-1368. This paper deploys the amplitude-frequency formulation for nonlinear oscillators to reveal the critically important mechanism of the pseudo-periodic motion, and finds the quadratic nonlinear force contributes to the pull-down phenomenon in each cycle of the periodic motion, when the force reaches a threshold value, the pull-down instability occurs.	cache/fumecheng-11486.pdf	txt/fumecheng-11486.txt