本文關(guān)鍵詞： NES 民用航空發(fā)動機 雙頻帶 振動抑制　出處：《應(yīng)用數(shù)學和力學》2017年11期 　論文類型：期刊論文

【摘要】：針對某型民用航空發(fā)動機雙頻帶激勵特點,建立了單自由度線性振子耦合非線性能量阱(nonlinear energy sink,NES)的動力學模型.根據(jù)典型雙轉(zhuǎn)子發(fā)動機在巡航狀態(tài)下低、高特征頻率比(1∶4.74),為系統(tǒng)設(shè)定雙頻帶簡諧外激勵.利用四階Runge-Kutta算法,研究了耦合NES振子時系統(tǒng)的振動抑制特征,并從外激勵頻率對系統(tǒng)主振子動能、系統(tǒng)總體能量的影響等方面,與未耦合NES系統(tǒng)、耦合線性動力吸振器兩種情況下的數(shù)值計算結(jié)果進行對比分析.研究結(jié)果表明NES對雙頻帶外激勵具有更好的振動抑制效果,用NES降低航空發(fā)動機振動有可行性
[Abstract]:According to the characteristics of dual frequency band excitation of a civil aero-engine, a dynamic model of nonlinear energy / NES coupled with a single degree of freedom linear oscillator is established. According to the low cruising condition of a typical double-rotor engine, With a high characteristic frequency ratio of 1: 4.74, the dual band harmonic external excitation is set up for the system. By using the fourth-order Runge-Kutta algorithm, the vibration suppression characteristics of the system with coupled NES oscillator are studied, and the effects of the external excitation frequency on the kinetic energy of the main oscillator and the total energy of the system are discussed. The results of numerical calculation of coupled linear dynamic vibration absorbers are compared with those of uncoupled NES systems. The results show that NES has better vibration suppression effect on dual-frequency out-of-band excitation, and it is feasible to use NES to reduce the vibration of aeroengine.
【作者單位】： 天津大學機械工程學院力學系天津市非線性動力學與混沌控制重點實驗室;中國民航大學航空工程學院飛機系;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)(2014CB046805) 國家自然科學基金(11372211;11672349)~~
【分類號】：TB535;V231.92
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本文編號：1504058