大型直线振动筛横梁结构动力学分析  

Dynamic Analysis of Beam Structure of Large-scale Linear Vibrating Screen

作　　者：何凡[1] 富佳兴[1] 苏荣华[2] 丁文文[2] 

机构地区：[1]辽宁工程技术大学机械工程学院,阜新123000 [2]辽宁工程技术大学力学与工程学院,阜新123000

出　　处：《世界科技研究与发展》2011年第2期221-223,共3页World Sci-Tech R&D

基　　金：国家"十一五"科技支撑计划资助项目(2006BAA01B05)

摘　　要：针对某大型直线振动筛频繁出现横梁断裂问题,应用ANSYS软件,对横粱结构进行了模态分析和谐响应分析,指出结构设计中存在问题。提出横梁结构改进方案,对改进后结构动力学性能进行分析,并与原设计横梁结构的动力学性能进行比较。结果表明:横梁断裂属于低应力断裂;横梁结构静力分析与动力分析的应力值差异较大,采用静力准则的结构设计不能保证结构可靠性;改进后的横梁结构应力状态得到改善,疲劳寿命提高。Aiming at the frequent fracture issues of the beams, ANSYS is used to analyse the model and harmonic response, the problems existed in beam structure design are obtained. The improvement schemes of the beam structure are proposed. According to the analysis of the dynamic performance of the improved beam structure and the comparison with the dynamic performance of the original beam structure, the resuits show that the fatigue fracture of beam structure belongs to low stress fracture. There is great difference of stress value between the static analysis and the dynamic analysis. The structural reliability is not ensured based on the structure design adopting static criterion. The stress state of the improved beam structure is ameliorated. The fatigue life of the improved beam structure is increased.

关 键 词：直线振动筛 横梁 模态分析 谐响应分析 结构改进 

分 类 号：TD452[矿业工程—矿山机电]