基于Workbench的立式径向挤压制管机机架的数值分析

Numerical analysis for frame of vertical radial press concrete pipe machine based on Workbench

采用CAD/CAM软件Pro/E对立式径向挤压水泥制管机机架进行几何实体建模.基于ANSYS Workbench仿真平台对制管机机架进行静态分析和模态分析以及瞬态动力分析.制管机机架采用热轧H型钢作为机架的立柱和横梁,材料为Q235B.通过静力分析可知,下侧移动平台负载变化较大时,如更换大口径模具,其支撑气缸和牵引气缸结构强度不足.通过模态分析可知,制管机机架侧向支撑刚度不足,应根据低阶振型对其加强以提高机架整体的低阶振动的稳定性.通过瞬态分析可知,制管机机架瞬态应力集中区域主要在立柱和侧向支撑上,和预期比较一致,该区域的机械强度需要进一步增强.通过上述静态、模态以及瞬态分析验证了机架设计的合理性,优化了机架设计方案,研究了冲击载荷随着时间的变化对机架结构的影响,为大口径立式径向挤压制管机的设计提供了必要的依据.

The CAD/CAM software Pro/E was used to model the frame of vertical radial press concrete pipe machine. Static analysis,modal analysis and transient dynamic analysis have been carried out based on the ANSYS Workbench simulation platform. Hot rolling H steel has been used as the column and beam of the tube machine frame,whose material is Q235 B. Through the static analysis,when the load change of the lower mobile platform is great,with the replacement of large diameter mold,the supporting cylinder and traction cylinder structure strength is insufficient. Through the modal analysis,it is shown that the lateral support stiffness of the pipe making machine is insufficient,and its stability of the lower order vibration of the whole frame should be strengthened according to the low order mode.According to the transient analysis,the transient stress concentration area of the pipe machine frame is mainly on the column and lateral support,which is consistent with the expectation,and needs to be strengthened. Through the static,modal and transient analyses,the rationality of frame design,anddesign optimization were verified and,impact load with the change of time on the frame structure were studied,which provided the necessary basis for the design of large diameter vertical radial press concrete pipe machine.