本文選題：提升機(jī)基礎(chǔ) + 監(jiān)測(cè)��； 參考：《遼寧工程技術(shù)大學(xué)》2015年碩士論文

【摘要】：礦井?dāng)U能改造會(huì)增加提升機(jī)基礎(chǔ)的負(fù)擔(dān),提升機(jī)的異常振動(dòng)也會(huì)對(duì)基礎(chǔ)造成不良影響,為此需對(duì)提升機(jī)基礎(chǔ)的振動(dòng)特性展開(kāi)研究。引入彈性半空間計(jì)算模式,采用Lysmer比擬法計(jì)算基礎(chǔ)的振幅,并通過(guò)解Lysmer理論方程組,得出正弦荷載下基礎(chǔ)位移與時(shí)間的方程,對(duì)基礎(chǔ)的位移時(shí)程曲線進(jìn)行求解。對(duì)提升機(jī)基礎(chǔ)進(jìn)行動(dòng)力測(cè)試,采集了基礎(chǔ)振動(dòng)的加速度時(shí)程曲線,并進(jìn)行功率譜分析,得出了基礎(chǔ)振動(dòng)的各階頻率。建立基礎(chǔ)的有限元模型,進(jìn)行特征值分析,得出基礎(chǔ)各階振型的頻率。進(jìn)行動(dòng)力時(shí)程分析,確定基礎(chǔ)振動(dòng)的危險(xiǎn)加速度。最終得出了以下結(jié)果和結(jié)論：1)根據(jù)解Lysmer方程的計(jì)算結(jié)果,理論解分為兩個(gè)部分：由z1(t)構(gòu)成的隨時(shí)間而衰減的阻尼振動(dòng)和由z2(t)構(gòu)成的周期性的受迫振動(dòng)。2)提升機(jī)基礎(chǔ)受到卷筒振動(dòng)、減速器電機(jī)運(yùn)轉(zhuǎn)、鋼繩牽引等動(dòng)力荷載的共同作用,受力較為復(fù)雜,從而導(dǎo)致其頻率也比較復(fù)雜。根據(jù)提升機(jī)基礎(chǔ)振動(dòng)功率譜分析結(jié)果,在提升機(jī)正常運(yùn)行時(shí),其振動(dòng)頻率皆為高頻,對(duì)大塊式基礎(chǔ)影響不大。3)通過(guò)基礎(chǔ)的特征值分析,基礎(chǔ)各階模態(tài)的特征值遠(yuǎn)遠(yuǎn)小于通過(guò)功率譜分析所得到的各階頻率,因此提升機(jī)正常運(yùn)行時(shí),其振動(dòng)頻率不會(huì)對(duì)基礎(chǔ)造成不良影響。4)根據(jù)動(dòng)力時(shí)程分析結(jié)果,基礎(chǔ)振動(dòng)的位移時(shí)程曲線與加速度時(shí)程曲線有很高的相關(guān)性,這是由于提升機(jī)基礎(chǔ)的剛度很大,在其振動(dòng)時(shí)自身的模態(tài)響應(yīng)影響很小。5)在1.5倍的正常運(yùn)行荷載下,基礎(chǔ)的振動(dòng)位移達(dá)到限值,此時(shí)的振動(dòng)加速度為危險(xiǎn)加速度。6)通過(guò)將有限元模擬結(jié)果與實(shí)測(cè)值與理論計(jì)算值相對(duì)比,可知所建立的有限元模型是合理的,此方法可以應(yīng)用于提升機(jī)基礎(chǔ)的監(jiān)測(cè)預(yù)警系統(tǒng)。7)系統(tǒng)實(shí)際運(yùn)行結(jié)果表明,所建立監(jiān)測(cè)預(yù)警系統(tǒng)在對(duì)于提升機(jī)基礎(chǔ)的安全監(jiān)測(cè)與危險(xiǎn)預(yù)警中是可靠的。
[Abstract]:The reconstruction of mine capacity expansion will increase the burden on the foundation of the hoist, and the abnormal vibration of the hoist will also have a bad effect on the foundation. Therefore, it is necessary to study the vibration characteristics of the foundation of the hoist. In this paper, the elastic half-space model is introduced, and the amplitude of foundation is calculated by Lysmer analogy method. By solving the equations of Lysmer theory, the equations of displacement and time of foundation under sinusoidal load are obtained, and the displacement time history curve of foundation is solved. The dynamic test of the hoist foundation is carried out, the acceleration time history curve of the foundation vibration is collected, and the power spectrum analysis is carried out, and the frequency of the foundation vibration is obtained. The finite element model of foundation is established and eigenvalue analysis is carried out, and the frequency of each mode of foundation is obtained. Dynamic time history analysis is carried out to determine the dangerous acceleration of foundation vibration. Finally, the following results and conclusions are obtained: 1) based on the results of the solution of the Lysmer equation, The theoretical solution is divided into two parts: damping vibration, which is made up of z1t), and periodic forced vibration, which is composed of z2t). The foundation of the hoist is subjected to the vibration of reel, the motor of reducer, the traction of steel rope, and so on. The force is more complex, resulting in a more complex frequency. According to the results of vibration power spectrum analysis of the hoist foundation, when the hoist is in normal operation, its vibration frequency is all high frequency, which has little effect on the mass foundation. 3) through the analysis of the eigenvalue of the foundation, The eigenvalues of the fundamental modes are much smaller than those obtained by power spectrum analysis, so the vibration frequency of the hoist will not cause adverse effects on the foundation when it is in normal operation. 4) according to the results of dynamic time history analysis, The displacement time history curve of foundation vibration has a high correlation with acceleration time history curve. This is because the stiffness of the foundation of the hoist is very large, and the influence of its own modal response during vibration is very small. 5) under the normal running load of 1.5 times, the displacement time history curve of the foundation vibration has a high correlation with the acceleration time history curve. The vibration displacement of foundation reaches the limit, and the vibration acceleration is dangerous acceleration. 6) by comparing the finite element simulation result with the measured value and the theoretical calculation value, we can know that the finite element model is reasonable. This method can be applied to the monitoring and warning system of hoist foundation. 7) the practical operation results show that the established monitoring and warning system is reliable in safety monitoring and danger warning for hoist foundation.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU476

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郭曜欣;;基于MIDAS/GTS的邊坡抗滑樁最優(yōu)埋設(shè)部位的探討[J];土工基礎(chǔ);2014年03期

2 劉茂盛;張應(yīng)之;郭永生;;動(dòng)力機(jī)器基礎(chǔ)的概念設(shè)計(jì)[J];工業(yè)建筑;2014年06期

3 侯小強(qiáng);田樹(shù)濤;;基于Midas/GTS高邊坡開(kāi)挖及加固施工穩(wěn)定性分析[J];路基工程;2013年06期

4 王春玲;周波;胡勇;;彈性半空間地基與四邊自由異性矩形板相互作用的研究[J];應(yīng)用力學(xué)學(xué)報(bào);2013年04期

5 李洪杰;杜計(jì)平;齊帥;;礦井工作面頂板突水安全預(yù)警系統(tǒng)構(gòu)建研究[J];中國(guó)礦業(yè);2013年07期

6 汪偉忠;盧明銀;李洪杰;李珂;;礦井提升機(jī)安全預(yù)警系統(tǒng)的構(gòu)建研究[J];礦山機(jī)械;2013年02期

7 蘇長(zhǎng)勝;;礦井提升機(jī)控制技術(shù)研究現(xiàn)狀與發(fā)展[J];工礦自動(dòng)化;2013年02期

8 李偉;張獻(xiàn)州;吳玉苗;;基于Midas GTS的隧道3維變形建模與可視化研究[J];測(cè)繪與空間地理信息;2012年10期

9 高峰;趙馮兵;;地下結(jié)構(gòu)靜-動(dòng)力分析中的人工邊界轉(zhuǎn)換方法研究[J];振動(dòng)與沖擊;2011年11期

10 陳佩佩;劉秀娥;;礦井頂板突水預(yù)警系統(tǒng)研究與應(yīng)用[J];煤炭科學(xué)技術(shù);2010年12期

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