惯性振动落砂机动态特性研究

发布时间：2018-06-02 15:20

本文选题：落砂机 + 碰撞　；参考：《合肥工业大学》2012年硕士论文

【摘要】：本文以惯性振动落砂机为研究对象，以有限元软件LS—DYNA、HyperMesh和ADAMS为平台，建立落砂机框体与砂箱的有限元模型，对惯性振动落砂机进行碰撞仿真分析，并针对框体进行了拓扑优化设计，提出改进意见。主要研究有：（1）在HyperMesh中建立惯性振动落砂机框体与砂箱的有限元模型，利用命令流的方法导入非线性动力学分析程序LS—DYNA中，设置落砂机框体与砂箱的接触碰撞，分析落砂机框体与砂箱碰撞后的应力，并利用Mises屈服准则进行校核，同时找出落砂机框体在工作中的薄弱部件；（2）在ADAMS中建立惯性振动落砂机的仿真分析模型，利用弹簧连接框体与地面模拟落砂机的运动，应用多刚体动力学理论，对落砂机框体与砂箱的碰撞进行运动学仿真，得到落砂机框体所受到冲击力的情况，这对以后分析落砂机框体结构强度与疲劳有重要的指导意义；（3）在Hypermesh中对落砂机框体进行拓扑优化设计，采用两种优化方案对框体进行优化，通过对两种优化结果的分析，验证优化方案的合理性，提出增加框体薄弱结构的厚度或者增加筋板的结构改进意见，，以此增加框体的结构强度。
[Abstract]:In this paper, the finite element model of the frame and the sand box is established by using the finite element software LS-DYNAA HyperMesh and ADAMS as the research object, and the impact simulation analysis of the inertial vibration sand blanking machine is carried out. The topology optimization design of the frame is carried out, and the improvement suggestions are put forward. The main studies are: 1) the finite element model of the frame and sandbox of inertial vibration sand blanking machine is established in HyperMesh. The method of command flow is used to import the nonlinear dynamic analysis program LS-DYNA, and the contact collision between the frame body and sand box is set up. This paper analyzes the stress of the sand blanking machine frame and the sand box after collision, and uses the Mises yield criterion to check and find the weak parts of the sand falling machine frame in the working process. (2) the simulation analysis model of inertial vibration sand blanking machine is established in ADAMS. The motion of sand blanking machine is simulated by spring connecting frame and ground, and the kinematic simulation of the impact between the frame body and sand box is carried out by applying the theory of multi-rigid body dynamics. The results of the impact force on the sand-blanking frame body are of great significance to the analysis of the structural strength and fatigue of the sand-blanking machine frame body in the future. 3) in Hypermesh, the sand-blanking machine frame is designed by topology optimization, and two optimization schemes are adopted to optimize the frame body. Through the analysis of the two optimization results, the rationality of the optimization scheme is verified. In order to increase the structural strength of the frame, it is proposed to increase the thickness of the weak structure of the frame or the structural improvement of the stiffened plate.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH69

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