工業(yè)廠房動力機器工作平臺振動疲勞性能研究
發(fā)布時間:2019-07-18 09:54
【摘要】:以某燒結礦篩分室工作平臺為研究對象,對不同工況下篩分室工作平臺進行振動測試。時域及頻域分析結果表明,工作平臺存在共振現象且振動幅值超限。為掌握工作平臺的振動疲勞性能,建立有限元模型,以實測振動數據作為激勵,通過瞬態(tài)動力學分析,得到不同共振條件下平臺的振動疲勞性能。將目前運行的三個工況的疲勞性能作為基準,發(fā)現當振動篩運行頻率f_1與結構自振頻率f_2相等時,節(jié)點振幅增大25.6%,疲勞壽命減小65.68%;當f_1與f_2相差20%時,節(jié)點振幅增大17.6%,疲勞壽命減小50.33%;當f_1與f_2相差40%時,節(jié)點振幅增大7.23%,疲勞壽命減小23.76%。
[Abstract]:The working platform of a sintering ore screen room is used as the research object, and the vibration test is carried out on the working platform of the screening chamber under different working conditions. The results of time-domain and frequency-domain analysis show that the working platform has a resonance phenomenon and the vibration amplitude is over-limit. In order to master the vibration fatigue performance of the working platform, a finite element model is established to measure the vibration data as the excitation, and the vibration fatigue performance of the platform under different resonance conditions is obtained by the transient dynamic analysis. The fatigue performance of the three working conditions which are currently running is used as a reference. When the running frequency f _ 1 of the vibrating screen is equal to the natural frequency f _ 2 of the structure, the amplitude of the node is increased by 25.6%, the fatigue life is reduced by 65.68%, and when the f _ 1 and the f _ 2 differ by 20%, the amplitude of the node is increased by 17.6% and the fatigue life is reduced by 50.33%; When f _ 1 and f _ 2 differ by 40%, the amplitude of the node is increased by 7.23%, and the fatigue life is decreased by 23.76%.
【作者單位】: 內蒙古科技大學土木工程學院;北京市第三建筑工程有限公司;
【基金】:內蒙古自治區(qū)自然科學基金資助項目(2015MS0552)
【分類號】:TB49;TB53
本文編號:2515805
[Abstract]:The working platform of a sintering ore screen room is used as the research object, and the vibration test is carried out on the working platform of the screening chamber under different working conditions. The results of time-domain and frequency-domain analysis show that the working platform has a resonance phenomenon and the vibration amplitude is over-limit. In order to master the vibration fatigue performance of the working platform, a finite element model is established to measure the vibration data as the excitation, and the vibration fatigue performance of the platform under different resonance conditions is obtained by the transient dynamic analysis. The fatigue performance of the three working conditions which are currently running is used as a reference. When the running frequency f _ 1 of the vibrating screen is equal to the natural frequency f _ 2 of the structure, the amplitude of the node is increased by 25.6%, the fatigue life is reduced by 65.68%, and when the f _ 1 and the f _ 2 differ by 20%, the amplitude of the node is increased by 17.6% and the fatigue life is reduced by 50.33%; When f _ 1 and f _ 2 differ by 40%, the amplitude of the node is increased by 7.23%, and the fatigue life is decreased by 23.76%.
【作者單位】: 內蒙古科技大學土木工程學院;北京市第三建筑工程有限公司;
【基金】:內蒙古自治區(qū)自然科學基金資助項目(2015MS0552)
【分類號】:TB49;TB53
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