【摘要】：目前水泥混凝土路面的修繕與改建工程越來越多,采取的維修改造措施包括“白加白”、“白加黑”或“白改黑”,但在施工后經(jīng)常會發(fā)生反射裂縫,達(dá)不到預(yù)想的使用效果。為此,國外提出了共振碎石化技術(shù),該技術(shù)可以有效消除反射裂縫,提高路面的使用壽命。因此,國內(nèi)亟需對共振碎石化技術(shù)和設(shè)備進(jìn)行研究。本論文基于對水泥混凝土路面自振頻率和共振破碎機振動系統(tǒng)的研究,結(jié)合多體系統(tǒng)動力學(xué)理論,運用虛擬樣機技術(shù),對共振破碎機的振動系統(tǒng)進(jìn)行動力學(xué)仿真研究。首先,本文在分析共振碎石化過程的基礎(chǔ)上,根據(jù)振動理論和薄板理論推導(dǎo)了水泥混凝土路面的振動響應(yīng)方程,并求解得到溫克勒地基上面板在不同邊界條件下的固有頻率計算公式;計算不同邊界條件下面板的固有頻率,分析在不同地基反應(yīng)模量、不同厚度和不同長度條件下,面板固有頻率的變化趨勢。本文還描述了振動系統(tǒng)的簡化模型,在此基礎(chǔ)上對梁的受力做了詳細(xì)分析,并推導(dǎo)出梁在振動過程中的動力學(xué)方程;建立了梁的有限元模型后,導(dǎo)入ANSYS軟件中進(jìn)行自由模態(tài)分析,選取了第七階模態(tài)的固有頻率與振型,并確定了定位孔的位置。最后,建立振動系統(tǒng)的剛?cè)岫囿w混合動力學(xué)仿真模型,通過分析仿真結(jié)果,驗證了共振破碎機振動系統(tǒng)工作原理的可行性和定位點選取的合理性,并確定振動系統(tǒng)的振動特性;建立水泥面仿真模型,形成完整的振動破碎動力學(xué)模型,分析仿真結(jié)果得到不同激振頻率對系統(tǒng)破碎性能的影響。本文利用仿真分析軟件ADAMS對共振破碎機振動系統(tǒng)和路面破碎過程進(jìn)行了動力學(xué)仿真分析,對系統(tǒng)的性能有了一定了解,為共振破碎機的實際生產(chǎn)制造提供了相對可靠的數(shù)據(jù)支持。
[Abstract]:At present, there are more and more repair and reconstruction projects of cement concrete pavement. The measures adopted include "white plus white", "white plus black" or "white to black", but reflection cracks often occur after construction, which can not achieve the expected use effect. Therefore, the resonance crushing technology is put forward abroad, which can effectively eliminate the reflective cracks and prolong the service life of the pavement. Therefore, it is urgent to study the resonance crushing technology and equipment in our country. Based on the study of the natural vibration frequency of cement concrete pavement and the vibration system of the resonance crusher, the dynamic simulation of the vibration system of the resonance crusher is carried out by using the virtual prototype technology and the multi-body system dynamics theory. Firstly, on the basis of analyzing the process of resonance crushing, the vibration response equation of cement concrete pavement is deduced according to the vibration theory and thin plate theory. The formulas for calculating the natural frequencies of the slab on the Winkler foundation under different boundary conditions are obtained. The natural frequency of the panel under different boundary conditions is calculated and the change trend of the natural frequency of the panel under the conditions of different foundation response modulus, different thickness and different length is analyzed. The simplified model of vibration system is also described in this paper. On the basis of this, the force of beam is analyzed in detail, and the dynamic equation of beam in vibration process is deduced. After the finite element model of the beam is established, the free modal analysis is carried out in ANSYS software, the natural frequency and mode shape of the seventh modal are selected, and the location of the locating hole is determined. Finally, the rigid-flexible multi-body hybrid dynamics simulation model of the vibration system is established. Through the analysis of the simulation results, the feasibility of the working principle of the vibration system of the resonance crusher and the rationality of the selection of the positioning point are verified, and the vibration characteristics of the vibration system are determined. The cement surface simulation model is established to form a complete dynamic model of vibration crushing. The effects of different excitation frequencies on the crushing performance of the system are obtained by analyzing the simulation results. In this paper, the dynamic simulation of vibration system and road surface crushing process of resonance crusher is carried out by using simulation and analysis software ADAMS, and the performance of the system is understood to some extent. It provides a relatively reliable data support for the actual production of the resonance crusher.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U418.32

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本文編號：2465846