共振式破碎机的车路耦合振动特性分析
发布时间：2019-01-26 08:58
【摘要】：共振式水泥路面破碎车主要是运用振动梁的共振原理并结合路面碎石化技术达到旧水泥路面快速改造的专用工程机械。调整锤头的敲击频率、振动梁的固有频率和路面的固有频率一致时，利用共振原理达到破碎水泥路面的目的。使用共振式水泥路面破碎车对破旧水泥路面进行改造可以最小化的降低路面改造成本，且具有环境污染小，工作噪声低等优点。 本课题通过建立刚柔耦合的虚拟样机模型，将共振梁分段进行柔性化，，模拟梁发生共振时的非线性变化，研究整梁柔性化和分段柔性化对振动特性的影响；通过引入损伤因子建立损伤因子与变形量间的关系以及路面破碎时的阻尼与变形量间的关系，建立水泥路面有效作用区域的模型，将其简化为质量-刚度-阻尼模型，以便于研究路面与破碎车的相互作用，研究不同的激振器频率时，路面的振动特性，对前支点处缓冲器和后支点处减振器的阻尼大小进行了分析，分析了配重块的质量对振动特性的影响。 本论文通过采取分块柔性化的方法，减小因为模态的线性叠加造成的仿真分析误差，建立车路耦合系统，对系统相关位置处的振动特性进行了研究，得到相应的变化曲线，为以后共振式水泥路面破碎车的设计优化提供了参考。
[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.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：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.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.32
【参考文献】
相关期刊论文 前10条
1 柯国军,郭长青,胡绍全,陈振富,石建军,孙德纶,陈俊杰;轻骨料混凝土阻尼比研究[J];混凝土;2002年10期
2 杜平安;有限元网格划分的基本原则[J];机械设计与制造;2000年01期
3 韩志仁,陶华,黄
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