中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2015年
17期
2378-2383,2384
,共7页
陈洪月%刘烈北%马英%张瑜%谢苗
陳洪月%劉烈北%馬英%張瑜%謝苗
진홍월%류렬북%마영%장유%사묘
掘锚联合机%非线性的%随机振动%动力学仿真
掘錨聯閤機%非線性的%隨機振動%動力學倣真
굴묘연합궤%비선성적%수궤진동%동역학방진
bolter system on roadheader%nonlinear%random vibration%dynamics simulation
将虚拟仿真方法、Bekker 模型、Newmark-β法相结合，分析了打顶部锚杆孔时掘锚联合机的非线性振动特性.采用 DYNA 虚拟仿真获得锚杆钻头的阻力载荷，利用采样定理对载荷进行离散化处理，作为钻头的随机工作载荷；采用 Bekker 模型描述了掘进机履带与巷道底板间的非线性行为，再根据牛顿运动学定律建立了掘锚联合机多自由度非线性振动方程，利用 Newmark-β法对方程进行了求解，分析了整机的振动特性，结果表明：受履带与底板间非线性接触力的影响，整机振动处于混沌态；锚杆钻机工作时，整机虽然存在着俯仰和横滚振动，但振动量很小，整机的竖直振动占主导地位.对掘锚联合机的振动特性进行了现场实验，测量打10组锚杆孔时掘进机本体的振动量，测量结果中有6组的振动量均方根值接近仿真值(1．5 mm)，实验结果表明掘锚联合机的非线性模型在一定程度上可以视为是准确的.
將虛擬倣真方法、Bekker 模型、Newmark-β法相結閤，分析瞭打頂部錨桿孔時掘錨聯閤機的非線性振動特性.採用 DYNA 虛擬倣真穫得錨桿鑽頭的阻力載荷，利用採樣定理對載荷進行離散化處理，作為鑽頭的隨機工作載荷；採用 Bekker 模型描述瞭掘進機履帶與巷道底闆間的非線性行為，再根據牛頓運動學定律建立瞭掘錨聯閤機多自由度非線性振動方程，利用 Newmark-β法對方程進行瞭求解，分析瞭整機的振動特性，結果錶明：受履帶與底闆間非線性接觸力的影響，整機振動處于混沌態；錨桿鑽機工作時，整機雖然存在著俯仰和橫滾振動，但振動量很小，整機的豎直振動佔主導地位.對掘錨聯閤機的振動特性進行瞭現場實驗，測量打10組錨桿孔時掘進機本體的振動量，測量結果中有6組的振動量均方根值接近倣真值(1．5 mm)，實驗結果錶明掘錨聯閤機的非線性模型在一定程度上可以視為是準確的.
장허의방진방법、Bekker 모형、Newmark-β법상결합，분석료타정부묘간공시굴묘연합궤적비선성진동특성.채용 DYNA 허의방진획득묘간찬두적조력재하，이용채양정리대재하진행리산화처리，작위찬두적수궤공작재하；채용 Bekker 모형묘술료굴진궤리대여항도저판간적비선성행위，재근거우돈운동학정률건립료굴묘연합궤다자유도비선성진동방정，이용 Newmark-β법대방정진행료구해，분석료정궤적진동특성，결과표명：수리대여저판간비선성접촉력적영향，정궤진동처우혼돈태；묘간찬궤공작시，정궤수연존재착부앙화횡곤진동，단진동량흔소，정궤적수직진동점주도지위.대굴묘연합궤적진동특성진행료현장실험，측량타10조묘간공시굴진궤본체적진동량，측량결과중유6조적진동량균방근치접근방진치(1．5 mm)，실험결과표명굴묘연합궤적비선성모형재일정정도상가이시위시준학적.
By combining the virtual simulation method,the Bekker model and the Newmark-βmethod,the nonlinear vibration characteristics of a bolter system on roadheader was analyzed during the process of drilling the top bolting hole.The resistance load of the anchor bit was obtained by the virtual simulation with DYNA software,and the load was discretized to be the random working load by employing the sample theorem.The nonlinear relation between the roadheader track and the tunnel bottom floor was expressed by Bekker model,and the multi-degree nonlinear vibration equation of the bolter system on roadheader was established according to Newton kinematics law.The equation was resolved by Newmark-βmethod,and the vibration characteristics of the entire machine was analyzed. The results show that the vibration state of the entire machine is as chaos state by the influence of the contact force between the roadheader track and the tunnel bottom floor,the vibration quantity is very small though the pitch vibration and the roll vibration exist simultaneously,and the vertical vibration of the entire machine is predominant.Field experiments were carried out about vibration characteris-tics of the roadheader.Amount of vibration of the roadheader were measured when drilling 10 set of bolt holes.The root mean square values in the measured results of 6 set of vibration are close to the simulation value(1.5 mm).Experimental results show that non-linear model of the bolter system on roadheader can be seen as accurate to some extent.
