共振式破碎機的車路耦合振動特性分析
發(fā)布時間：2019-01-26 08:58
【摘要】：共振式水泥路面破碎車主要是運用振動梁的共振原理并結合路面碎石化技術達到舊水泥路面快速改造的專用工程機械。調整錘頭的敲擊頻率、振動梁的固有頻率和路面的固有頻率一致時，利用共振原理達到破碎水泥路面的目的。使用共振式水泥路面破碎車對破舊水泥路面進行改造可以最小化的降低路面改造成本，且具有環(huán)境污染小，工作噪聲低等優(yōu)點。 本課題通過建立剛柔耦合的虛擬樣機模型，將共振梁分段進行柔性化，，模擬梁發(fā)生共振時的非線性變化，研究整梁柔性化和分段柔性化對振動特性的影響；通過引入損傷因子建立損傷因子與變形量間的關系以及路面破碎時的阻尼與變形量間的關系，建立水泥路面有效作用區(qū)域的模型，將其簡化為質量-剛度-阻尼模型，以便于研究路面與破碎車的相互作用，研究不同的激振器頻率時，路面的振動特性，對前支點處緩沖器和后支點處減振器的阻尼大小進行了分析，分析了配重塊的質量對振動特性的影響。 本論文通過采取分塊柔性化的方法，減小因為模態(tài)的線性疊加造成的仿真分析誤差，建立車路耦合系統(tǒng)，對系統(tǒng)相關位置處的振動特性進行了研究，得到相應的變化曲線，為以后共振式水泥路面破碎車的設計優(yōu)化提供了參考。
[Abstract]:The resonant cement pavement crusher is a kind of special construction machinery which mainly uses the resonance principle of vibration beam and combines the pavement gravel technology to achieve the rapid reconstruction of the old cement pavement. When the percussion frequency of hammer head is adjusted and the natural frequency of vibration beam is the same as that of pavement, the purpose of breaking cement pavement is achieved by resonance principle. The cost of pavement reconstruction can be minimized by the use of resonant cement pavement crusher vehicle, and it has the advantages of low environmental pollution and low working noise. By establishing a rigid-flexible coupling virtual prototype model, the section of the resonant beam is flexible, and the nonlinear change of the beam is simulated, and the effect of the flexibility of the whole beam and the flexibility of the whole beam on the vibration characteristics is studied. By introducing the damage factor to establish the relationship between the damage factor and the deformation and the relationship between the damping and the deformation when the pavement is broken, the model of the effective zone of the cement pavement is established, which is simplified as the mass-stiffness damping model. In order to study the interaction between the road surface and the broken car, and to study the vibration characteristics of the road surface with different exciter frequencies, the damping of the front fulcrum buffer and the rear fulcrum absorber is analyzed. The effect of the mass of the weight distribution block on the vibration characteristics is analyzed. In this paper, by adopting the method of block flexibility, the simulation error caused by the linear superposition of the modes is reduced, and the vehicle-road coupling system is established. The vibration characteristics at the relative position of the system are studied, and the corresponding variation curves are obtained. It provides a reference for the design optimization of the resonant cement pavement crushing vehicle in the future.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U418.32
[Abstract]:The resonant cement pavement crusher is a kind of special construction machinery which mainly uses the resonance principle of vibration beam and combines the pavement gravel technology to achieve the rapid reconstruction of the old cement pavement. When the percussion frequency of hammer head is adjusted and the natural frequency of vibration beam is the same as that of pavement, the purpose of breaking cement pavement is achieved by resonance principle. The cost of pavement reconstruction can be minimized by the use of resonant cement pavement crusher vehicle, and it has the advantages of low environmental pollution and low working noise. By establishing a rigid-flexible coupling virtual prototype model, the section of the resonant beam is flexible, and the nonlinear change of the beam is simulated, and the effect of the flexibility of the whole beam and the flexibility of the whole beam on the vibration characteristics is studied. By introducing the damage factor to establish the relationship between the damage factor and the deformation and the relationship between the damping and the deformation when the pavement is broken, the model of the effective zone of the cement pavement is established, which is simplified as the mass-stiffness damping model. In order to study the interaction between the road surface and the broken car, and to study the vibration characteristics of the road surface with different exciter frequencies, the damping of the front fulcrum buffer and the rear fulcrum absorber is analyzed. The effect of the mass of the weight distribution block on the vibration characteristics is analyzed. In this paper, by adopting the method of block flexibility, the simulation error caused by the linear superposition of the modes is reduced, and the vehicle-road coupling system is established. The vibration characteristics at the relative position of the system are studied, and the corresponding variation curves are obtained. It provides a reference for the design optimization of the resonant cement pavement crushing vehicle in the future.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U418.32
【參考文獻】
相關期刊論文 前10條
1 柯國軍,郭長青,胡紹全,陳振富,石建軍,孫德綸,陳俊杰;輕骨料混凝土阻尼比研究[J];混凝土;2002年10期
2 杜平安;有限元網(wǎng)格劃分的基本原則[J];機械設計與制造;2000年01期
3 韓志仁,陶華,黃
本文編號：2415327
本文鏈接：http://sikaile.net/kejilunwen/jiaotonggongchenglunwen/2415327.html
教材專著
