【作者】 高琦；

【导师】 张小龙； 杨拉道；

【作者基本信息】 西安建筑科技大学 ， 机械设计及理论， 2008， 硕士

【摘要】 连铸机作为钢铁生产中间环节的重型设备,对提高钢产量起着十分重要的作用。钢包回转台是连铸机的组成部分,它是钢包的支撑和承运设备。升降支臂是钢包回转台的主要工作部件。国内大承载能力钢包回转台全部依靠引进,因此对大承载能力钢包回转台升降支臂的计算与研究,对国内自主设计大承载能力钢包回转台具有重要的理论意义和实用价值。本文主要利用有限元方法及ANSYS软件对连铸机钢包回转台升降支臂进行了强度计算及结构优化设计,研究结果对升降支臂的设计具有一定的指导意义。本文主要作了以下工作:(1)升降支臂主要承受冲击载荷作用,因此本文首先对设计中的动载荷冲击系数进行理论研究,得出了比较科学和符合实际的计算方法。(2)忽略焊接缺陷对结构强度的影响,在SolidWorks中按零件对升降支臂进行实体建模,利用通用的Pararsolid参数实体文件格式将实体模型导入ANSYS中,使用solid 45单元对模型进行自由网格划分,根据升降支臂周围构件的冲击力,对模型施加合理的边界条件,并考虑重力的影响,进行升降支臂的变形和应力计算,得到冲击力作用下升降支臂的变形和应力分布规律。(3)建立了升降支臂优化设计模型,根据实际工作情况确定了约束条件,在对升降支臂分段进行受力分析的基础上,求解出优化过程所需的方程;根据升降支臂优化数学模型使用Matlab优化函数fmincon,编写了优化程序,并对升降支臂进行优化计算;为了验证优化结果的正确性,根据优化结果修改初始模型,对优化后模型进行有限元强度计算;最后对优化前后的模型进行了比较分析。通过对升降支臂的结构优化设计,使升降支臂在满足强度和刚度的条件下,质量减轻了13.5%,取得了较好的优化结果。更多还原

【Abstract】 Continuous casting machine heavy equipment as part of the middle of steel production,to increase steel production plays a very important role.Ladle turret as an integral part of continuous casting machine is the equipment of supporting and carrying ladle.Arm is the main working parts of ladle turret.The domestic large carrying capacity ladle turret all rely on imports,therefore arm of large carrying capacity ladle turret calculation and research to have the important theory significance and practical value of domestic designing the large carrying capacity ladle turret.This article mainly has carded on the strength calculation and the structure optimization design using the finite element method and the ANSYS software to the arm of ladle turret.Research findings on the design of the arm have certain significance.The main research works are as follows:First,the arm mainly to bear the impact load.So this first design of the impact coefficient for theoretical research shows that more scientific and realistic method of calculation.Second,overlooked welding defects on the impact of structural strength,in accordance with the Solidworks parts of the arm entity modeling,using a common tile format Pararsolid parameter entities will import ANSYS entity model.The use of solid 45 units of the model of free grid Division,in accordance with the arm around the impact of components,the model impose reasonable boundary conditions,and to consider the impact of gravity,carrying on the calculation of deformation and stress of the arm,be under the impact of the role of the arm getting deformation and stress distribution of the arm.Last,the optimal design model of the arm is established,based on the actual work of the identified constraints.On the basis of analyzing sub-mechanical of the arm,a solution is finded to the optimize process of the equation.Under the arm optimize the mathematical model,using Matlab function fmincon,the preparation of the optimization process,the arm movements to optimize computing.In order to verify the accuracy of optimization results,according to optimize the results of amending the initial model,the optimal model is calculated for finite element strength.The last the optimization model is analyzed for comparative.Through the arm of the structural optimization and design, the ann to meet the strength and rigidity of conditions,reducing the quality of the 13.5 percent achieved a better optimization of results.更多还原