沥青搅拌设备振动筛筛箱的动态特性分析

了解沥青搅拌设备振动筛的动态特性,不仅可以提高骨料搅拌质量,还可以提高整个搅拌站生产率。运用ANSYS有限元分析软件,建立了沥青搅拌设备振动筛筛箱有限元模型,分析了其模态特性、谐响应特性和动应力的分布规律,研究了振动筛的强度和刚度。进行了振动筛强度试验,得到振动筛的动应力变化情况以对ANSYS分析结果进行验证。试验结果表明：所建立的有限元模型能较好地反映筛箱的实际结构特点;筛箱固有频率和工作频率不重合,因此振动筛在正常工作中不会产生共振;振动筛的刚度及强度都满足设计要求。

Dynamic performance analysis of vibrating screen box in asphalt mixer

It not only can increase the mixing quality of aggregate,but also can promote the productivity of mixing plant to study the dynamic performance of vibrating screen in asphalt mixer.With the finite element software of ANSYS,this paper built the finite element model of vibrating screen box in asphalt mixer,analyzed its modal characteristics,harmonic responses and the distributed regularities of dynamic stress,and studied the intensity and stiffness of vibrating screen.With the intensity test of the vibrating screen,the dynamic stress of vibrating screen was gotten to verify the ANSYS analysis results.The testing results show that this model can accurately reflect the actual structure features of vibrating screen box;its natural frequency is not coincided to working frequency,so there is not resonance during the normal operation of the vibrating screen;the dynamic rigidity and strength of vibrating screen can meet the design requirement.2 tabs,8 figs,10 refs.