本文選題：相似材料 + 機械振動��； 參考：《西安科技大學》2017年碩士論文

【摘要】：在“固-氣”耦合相似材料的研究成果和最新進展的基礎(chǔ)上,開展機械振動影響下物理相似模擬實驗,深入開展煤巖體受振時力學特性的變化規(guī)律,研究振動環(huán)境下煤巖破壞過程中能量演化機制,從能量轉(zhuǎn)化、能量演化及受振前后能量差的細觀特征等三個方面研究了相似材料在振-壓耦合過程中的能量行為,在振動模擬方面為煤與瓦斯安全共采體系提供理論基礎(chǔ)。運用正交實驗設(shè)計法及綜合評分法對振動實驗所需相似材料的配比進行實驗設(shè)計,通過不同材料特性對比分析進行原材料選擇。應(yīng)用材料力學、斷裂力學、振動力學及熱力學等基本理論與方法,構(gòu)建振動頻率與相似材料彈性模量、抗壓強度的關(guān)系模型,研究了機械振動后相似材料力學參數(shù)的變化規(guī)律。基于自行組裝的煤巖單軸約束下振動實驗系統(tǒng),對5組不同配比的相似材料試件開展力學性質(zhì)、彈性應(yīng)變密度能及耗散密度能測試實驗,總結(jié)出機械振動頻率對試件力學參數(shù)、彈性應(yīng)變密度能及耗散密度能的影響。通過建立的相似材料力學參數(shù)與振動頻率關(guān)系模型,計算得到不同振動頻率下相似材料試件的抗壓強度及彈性模量,與實驗結(jié)果較為吻合。單軸以及振-壓兩種不同的加載模式下,相似材料的能量演化規(guī)律均經(jīng)歷能量輸入、能量積聚和能量耗散3個階段。研究單向受載及振動下相似材料的能量演化規(guī)律,得到單向加載與振動耦合作用下相似材料的力學特征,分析了隨頻率演化的能量密度值、能量差及能量差比率的發(fā)展規(guī)律。能量密度值、能量差及能量差比率這三個參數(shù)可表征不同頻率下相似材料力學特征的發(fā)展規(guī)律,并通過大量實驗數(shù)據(jù)及關(guān)系模型論證分析方法的合理性。
[Abstract]:On the basis of the research results and recent progress of the "solid-gas" coupling similar materials, the physical similarity simulation experiment under the influence of mechanical vibration is carried out, and the variation law of mechanical properties of coal and rock mass under vibration is deeply carried out. The mechanism of energy evolution in the process of coal and rock failure under vibration environment is studied. The energy behavior of similar materials in the process of vibration-pressure coupling is studied from three aspects: energy transformation, energy evolution and mesoscopic characteristics of energy difference before and after vibration. In the aspect of vibration simulation, it provides a theoretical basis for coal and gas safe mining system. The orthogonal experimental design method and comprehensive scoring method were used to design the proportion of the similar materials needed in vibration experiment. The raw materials were selected by comparing and analyzing the characteristics of different materials. Based on the basic theories and methods of material mechanics, fracture mechanics, vibration dynamics and thermodynamics, the relationship between vibration frequency and elastic modulus and compressive strength of similar materials is established, and the variation law of mechanical parameters of similar materials after mechanical vibration is studied. Based on the self-assembled uniaxial vibration test system of coal and rock, the mechanical properties, elastic strain density energy and dissipation density energy of five groups of similar material specimens with different ratios were tested, and the mechanical parameters of mechanical vibration frequency to the specimen were summarized. The influence of elastic strain density energy and dissipation density energy. The compressive strength and elastic modulus of the specimens of similar materials under different vibration frequencies are calculated by the model of the relationship between mechanical parameters of similar materials and vibration frequency, which is in good agreement with the experimental results. Under the uniaxial and vibration-pressure loading modes, the energy evolution of the similar materials goes through three stages: energy input, energy accumulation and energy dissipation. The law of energy evolution of similar materials under unidirectional loading and vibration is studied. The mechanical characteristics of similar materials under unidirectional loading and vibration coupling are obtained. The development laws of energy density, energy difference and ratio of energy difference with frequency evolution are analyzed. The three parameters of energy density, energy difference and energy difference ratio can characterize the development law of similar material mechanics characteristics at different frequencies, and the rationality of the analytical method is demonstrated by a large number of experimental data and relational models.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD313

【參考文獻】

相關(guān)期刊論文 前10條

1 林海飛;翟雨龍;李樹剛;李莉;白楊;;基于正交設(shè)計的“固-氣”耦合相似材料力學與滲透特性試驗研究[J];煤炭學報;2016年03期

2 史小萌;劉保國;肖杰;;水泥和石膏膠結(jié)相似材料配比的確定方法[J];巖土力學;2015年05期

3 李樹剛;趙鵬翔;林海飛;肖鵬;魏宗勇;;煤巖瓦斯“固-氣”耦合物理模擬相似材料特性實驗研究[J];煤炭學報;2015年01期

4 劉曉敏;盛謙;陳健;柯文匯;楊繼華;;大型地下洞室群地震模擬振動臺試驗研究(Ⅰ):巖體相似材料配比試驗[J];巖土力學;2015年01期

5 張志鎮(zhèn);高峰;;受載巖石能量演化的圍壓效應(yīng)研究[J];巖石力學與工程學報;2015年01期

6 李樹剛;趙勇;許滿貴;;低頻機械振動煤體瓦斯含量變化規(guī)律研究[J];巖土工程學報;2015年05期

7 李樹剛;趙鵬翔;林海飛;潘宏宇;;膠結(jié)劑對“固-氣”耦合相似材料特性的影響[J];采礦與安全工程學報;2014年05期

8 平琦;馬芹永;袁璞;;巖石試件SHPB劈裂拉伸試驗中能量耗散分析[J];采礦與安全工程學報;2013年03期

9 李樹剛;趙勇;張?zhí)燔?;低頻機械振動影響煤樣吸附特性研究[J];中國礦業(yè)大學學報;2012年06期

10 張志鎮(zhèn);高峰;;單軸壓縮下巖石能量演化的非線性特性研究[J];巖石力學與工程學報;2012年06期

相關(guān)博士學位論文 前3條

1 段東;煤與瓦斯突出影響因素及微震前兆分析[D];東北大學　;2009年

2 萬國香;應(yīng)力波作用下巖石電磁輻射與聲發(fā)射特性研究[D];中南大學;2008年

3 趙瑜;深埋隧道圍巖系統(tǒng)穩(wěn)定性及非線性動力學特性研究[D];重慶大學;2007年

，

本文編號：1927892