噪声与振动控制2016，Vol.36Issue(6)：77-81,5.DOI:10.3969/j.issn.1006-1335.2016.06.015
有界窄带激励柴油机轴系扭振系统主参数共振
Primary Parametric Resonance of Shafting Torsional Vibration System of the Diesel Engine Subjected to Narrow-band Random Excitation
摘要
Abstract
The primary parameters resonance and stability problems of strong nonlinear torsional vibration of the diesel engine shafting system under narrow-band excitation are investigated. The frequency response equation of the system is obtained based on the modified multi-scale method and the corresponding Ito stochastic differential equation is derived. By means of the moment method, the approximate expression of the mean-square response of the system is obtained and the influence of the system parameters on the mean square value of the primary parametric resonance is analyzed. The results show that the sufficient and necessary conditions for the stability of primary parametric resonance are the same as those of the second order moment stability. With the increase of the damping, the mean square value of the resonant amplitude of the primary parameters of the system decreases;With the decrease of the torsional stiffness of the crankshaft, the slope of the mean square response curve of the system increases;Along with the increase of the random disturbance intensity, the time response curve and the phase diagram of the system only have small changes.关键词
振动与波/柴油机轴系扭振系统/窄带激励/改进多尺度法/主参数共振/均方响应Key words
vibration and wave/shaftin torsional vibration system of diesel engineg/narrow-band random excitation/modified multi-scale method/primary parametric resonance/mean square response引用本文复制引用
杨志安,卞雅媛..有界窄带激励柴油机轴系扭振系统主参数共振[J].噪声与振动控制,2016,36(6):77-81,5.基金项目
河北省自然科学基金项目 （）
