塔式起重机参数化设计_图文

1、 部件之间相对独立,但是必须满足总体装配的要求,各个主要参数关系能在各个部件的模型之间传递;建立塔机各个部件的数字化模型时,根据需要可以对主要构件的尺寸、结构和形状图1塔式起重机参数化设计流程图作者简介:王良文(1963,男,湖北荆州人,教授,在读博士生,主要研究方向:建筑机械设计、机构分析与综合、机器人系统动力学等。21此外,我们根据机械手册,选择与标准型结构所用角钢类型相近的角钢型号,并将所选择角钢的尺面的入口。部件参数化界面主要有标准节参数化界面、上下回转支座参数化界面、平衡臂参数化界面、臂架参数化界面和塔顶的参数化界面等。最后编写参数化设计程序,在VB环境下为了能访问Pro/E函数的资

2、源库,必须做出全局变量声明:Public Object(全局变量名称as New GwayAX。图2角钢三维实体图3角钢示意图图4建立与Pro/E的连接22整机模型导入Ansys作静力学和动力学分析,以使用要求为目标,重复参数化设计过程,达到最终优化结果。3参数化实例以某公司生产的QTZ63系列塔机的参数化设计算和顶升时的平衡计算。3.2标准节的参数化设计本文以标准节的参数化设计为例,介绍部件参数化设计的过程。标准节的参数化设计以我们想要改变的参数为目标:标准节高、标准节宽、主弦杆1的型号和宽、主弦杆2的型号和宽、斜支杆的型号和图5QTZ63系列塔式起重机参数化设计总界面图6标准节的参数化设计

3、界面23约束关系;Object.AsmAddComponent(,把装配件添加到装配图中。装配完成之后,保存并退出装配界面。4结束语(1塔机的参数化设计以Pro/E的二次开发为基础,利用Automation Gateway在Pro/E和VB之间架起的桥梁,发挥了VB软件的面向对象可视化编程,易学易用等优点。(2塔机的参数化设计与有限元软件Ansys相结合,以钢结构的重量最轻为目标,可以通过对不同图8标准节的装配24 的可靠性1,2。在传统的门架设计中一般以二维设计软件进行绘图,在设计不同吨位、不同型号的叉车门架时,存在修改图纸的工作量大、效率低等问题,同时在门架的工程设计上较少采用动态仿真分析

4、与优升重量为30kN的平衡重式叉车门架进行三维建模,并对叉车门架机构的工作过程通过ADAM S进行动态仿真分析,最后利用MATLAB优化工具箱对门架结构进行优化求解,为叉车门架设计提供一种*基金项目:西北农林科技大学校长基金项目;西北农林科技大学校青年学术骨干基金项目(01140303;中国博士后项目(20060401012作者简介:徐杰君(1982,男,浙江宁波人,硕士研究生,研究方向为机械设计及理论、机械CAD/CAM。25 9 12 ! quirements of engineering vehicles such as forklifts as well as some special

5、 operation requirements. Keywords: Combined steering; Wheel -steering mecha nism; Axle-steering assembly as well as analysis and verification. Taking the process of parametric design and assembly of a standard section of a tower crane as an actual example, design methods of parametric interfaces for

6、 the overall machine and components are demonstrated. It is suggested that the parametric model should be analyzed statiNumerical Analysis on Influencing Factors of Crushing Ef ficiency of Strike Back Type Crushing Machine Based on the 3D solid model of key components on a strike back type crushing

7、machine as well as the models of dynamic finite element analysis for rotor- plate hammer- strike back plate- stone colliding system, loading situations among components in crushing chamber during material impacting and crushing are analyzed and the influences of speed, rotational inertia and shape o

8、f strike back plate in each stage on crushing effect are also studied at the same time. The research shows that crushing force and efficiency can be increased with the increases of rotational inertia and speed of the rotor; the secondary crushing effect can be improved by improving the angle of stri

9、ke back plate. All the research provides a theoretical analysis basis for performance improvement of the crushing machine. Keywords:Strike back type crushing machine; Impact dynamics; Finite element analysis Dynamic Simulation and Optimal Design of Forklift Mast Frame Aiming at the disadvantages of

10、traditional design commonly used in domestic forklift mast frame design, Pro/E is adopted to set up a 3D model of mast frame on a counterweight type forklift. Operation simulation in one work cycle of the mast frame is conducted with ADAMS. A mathematical model of the mast frame structure is establi

11、shed for optimal design with an optimal target to minimize the maximum loading on tilt cylinder of the mast frame and then Matlab optimization tool box is used to optimize and solve the model. The results show that, in ADAMS, complete dynamic operation procedure of the mast frame as well as the vari

12、ation regularity of Parametric Design of Tower Cranes In view of severe market competition home and abroad, design efficiency of tower cranes need to be increased and their production cost should be cut down. A parametric design technology of cranes is described on the basis of secondary development

13、 of Pro/E. Through the secondary development of Pro/E based on Automation Gateway, principle of solid model establishing, concept of dimension parameterization and method to set up relationship restrains for cranes are expatiated. The procedure of parametric design is described through explanation o

14、f parametric design, parametric the loading on tilt cylinder vs the time can be analyzed accurately and rapidly. After the optimization, the maximum loading on tilt cylinder of the mast frame is reduced by 8.85% and the loading in the complete work cycle is also decreased correspondingly. The method above can be effectively applied to implement dynamic simulation analysis for forklift mast frame operation and its optimal structure design. Keywords:Forklift mast frame; ADAMS; MATLAB; Dynamic simulation; Optimal design cally and dynamically with finite element ana