侧向轧制变胞机构的动力学仿真与优化设计  

Dynamics simulation and optimization design of side rolling metamorphic mechanism

作　　者：孙乐乐 张海鸥[1] SUN Lele;ZHANG Haiou(School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2024年第6期56-62,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点研发计划资助项目(2019YFB1311100)。

摘　　要：为了解决电弧增材制造存在变形及微观组织形态和力学性能较差的问题,采用轧制使材料的力学性能得到极大改善.为了合理设计轧制机构,针对一种侧向轧制变胞机构进行动力学分析和优化设计,分别分析了杆件尺寸、主动件速度、弹簧刚度在变胞机构运动过程中对变胞机构的影响.首先,分析了侧向轧制变胞机构的原理,得到了机构的基本结构;然后,选取合适的设计变量初始值与边界值,确定目标函数及约束条件;最后,在机械系统动力学自动分析(ADAMS)软件中建立机构的虚拟样机模型,在一定的侧向轧制力下,以主动件的驱动力最小为优化目标进行仿真求解,得到驱动力的最优解和相应设计变量的最优值.结果表明:最小驱动力较优化前减小了15.48%,主动件速度、杆件尺寸、弹簧刚度对变胞机构的影响程度是依次减弱的.To solve the problems of deformation,microstructure and poor mechanical properties in arc additive manufacturing,the mechanical properties of materials can be greatly improved by rolling.To reasonably design the rolling mechanism,the dynamic analysis and optimization design of a side rolling metamorphic mechanism was carried out.The influence of the size of the rod,the speed of the driver,and the stiffness of the spring on the motion of the metamorphic mechanism were studied.First,the principle analysis of the side rolling mechanism was carried out,and the basic structure of the mechanism was obtained.Then,appropriate initial values and boundary values of design variables were selected to determine the objective function and constraint conditions.Finally,a virtual prototype model of the mechanism was established in automatic dynamic analysis of mechanical systems(ADAMS)software.Under a certain side rolling force,the minimum driving force of the driver was taken as the optimization objective to solve the simulation,and the optimal solution of the driving force and the optimal value of the design variable under the solution was obtained.Results show that the minimum driving force is reduced by 15.48%compared with that before optimization,and the influence of rod size,driver speed,and spring stiffness on the metamorphic mechanism is weakened in turn.

关 键 词：变胞机构 电弧增材制造 优化设计 动态仿真 机械系统动力学自动分析(ADAMS) 

分 类 号：TH132[机械工程—机械制造及自动化]