采用Matlab与Excel联合编程开发了纵轴式掘进机截割头辅助设计与优化软件,通过输入截割头必要的几何及运动学参数,便可实现其辅助设计与优化,并自动生成截齿排列图、载荷曲线、切削图及基于Pro/E的截割头3D模型;获取横摆速度、截割头转...采用Matlab与Excel联合编程开发了纵轴式掘进机截割头辅助设计与优化软件,通过输入截割头必要的几何及运动学参数,便可实现其辅助设计与优化,并自动生成截齿排列图、载荷曲线、切削图及基于Pro/E的截割头3D模型;获取横摆速度、截割头转速、螺旋升角、叶片头数及截齿排列方式与截割功率、截割比能耗、截割阻力、切削面积之间的参数关系,指导截割头的优化设计使其整体性能达到最优;能够独立运行的EXE文件使软件更具普适性、操作更简单。以某公司研发的EBZ220掘进机为工程对象,基于实际工况,找到了截割头最佳设计方案及最优运动参数,在截割电机额定功率下,保证切削面积最大达854.95 mm2,截割比能耗最低至4.9 k W·h/m3。展开更多
In routine design of tensioned membrane structures, the membrane is generally modeled using space membrane elements and the cables by space cable elements, with no sliding allowed between the membrane and the cables. ...In routine design of tensioned membrane structures, the membrane is generally modeled using space membrane elements and the cables by space cable elements, with no sliding allowed between the membrane and the cables. On the other hand, large deflections are expected and sliding between the membrane and the cables is inevitable. In the present paper, the general finite element code ABAQUS was employed to investigate the influence of cable sliding on membrane surface on the structural behavior. Three analysis models were devised to fulfill this purpose: (1) The membrane element shares nodes with the cable element; (2) The cable can slide on the membrane surface freely (without friction) and (3) The cable can slide on the membrane surface, but with friction between the cable and the membrane. The sliding problem is modeled using a surface - based contact algorithm. The results from three analysis models are compared, showing that cable sliding has only little influence on the structure shape and on the stress distributions in the membrane. The main influence of cable sliding may be its effect on the dynamic behavior of tensioned membrane structures.展开更多
文摘采用Matlab与Excel联合编程开发了纵轴式掘进机截割头辅助设计与优化软件,通过输入截割头必要的几何及运动学参数,便可实现其辅助设计与优化,并自动生成截齿排列图、载荷曲线、切削图及基于Pro/E的截割头3D模型;获取横摆速度、截割头转速、螺旋升角、叶片头数及截齿排列方式与截割功率、截割比能耗、截割阻力、切削面积之间的参数关系,指导截割头的优化设计使其整体性能达到最优;能够独立运行的EXE文件使软件更具普适性、操作更简单。以某公司研发的EBZ220掘进机为工程对象,基于实际工况,找到了截割头最佳设计方案及最优运动参数,在截割电机额定功率下,保证切削面积最大达854.95 mm2,截割比能耗最低至4.9 k W·h/m3。
文摘In routine design of tensioned membrane structures, the membrane is generally modeled using space membrane elements and the cables by space cable elements, with no sliding allowed between the membrane and the cables. On the other hand, large deflections are expected and sliding between the membrane and the cables is inevitable. In the present paper, the general finite element code ABAQUS was employed to investigate the influence of cable sliding on membrane surface on the structural behavior. Three analysis models were devised to fulfill this purpose: (1) The membrane element shares nodes with the cable element; (2) The cable can slide on the membrane surface freely (without friction) and (3) The cable can slide on the membrane surface, but with friction between the cable and the membrane. The sliding problem is modeled using a surface - based contact algorithm. The results from three analysis models are compared, showing that cable sliding has only little influence on the structure shape and on the stress distributions in the membrane. The main influence of cable sliding may be its effect on the dynamic behavior of tensioned membrane structures.
