摘要
针对目前设计的立式径向挤压制管机成型头,采用SolidWorks软件建立不同拔模斜度的成型头三维模型,运用Hypermesh软件对各模型进行前处理,通过LS-Dyna计算各成型头挤压混凝土成型的力学行为,分析了拔模斜度对混凝土最大应力和应变的影响,拟合出了拔模斜度与混凝土最大应力、应变的关系曲线,确定混凝土成型效果最佳时,成型头的拔模斜度为2.1°。在此条件下,基于数值模拟和正交实验,分析了成型头上升速度、上挤压辊顺时针旋转速度、下挤压辊与抹光环逆时针旋转速度对混凝土成型效果的影响,确定了最佳的工艺参数组合:成型头上升速度为0.1 m/s,上挤压辊顺时针旋转速度为60 r/min,下挤压辊与抹光环逆时针旋转速度为140 r/min。
The molding head of vertical radial press concrete pipe machine was designed. The SolidWorks software is used to model the different draft angle molding heads, and the HyperMesh software is used to establish the finite element model of each molding head. The Ls-Dyna is used to calculate the mechanical behavior of molding head extruding the concrete to analyze the effect of draft angle on the stress and strain of concrete. From the fitted curve of draft angle and the stress and strain of concrete, the molding results of the concrete are the best when the draft angle of molding head is 2.1° Under this condition, based on the numerical simulation and orthogonal experiment, the effects of the rising speed of the molding head, the clockwise rotation speed of the upper roller and the counterclockwise rotation speed of the lower roller on the molding results of the concrete are analyzed. The best combination of process parameters is that the rising speed of the molding head is 0.1 m/s, the clockwise rotation speed of the upper roller is 60 r/min and the counterclockwise rotation speed of the lower roller is 140 r/min.
出处
《混凝土与水泥制品》
北大核心
2018年第11期78-81,共4页
China Concrete and Cement Products
基金
国家自然科学基金面上项目(51775260)
南京工程学院创新基金重大项目(CKJA201601)
江苏省重大科技成果转化项目(BA2015148)
江苏省产学研前瞻性联合研究项目(BY2015009-01)
关键词
立式径向挤压制管机
成型头
结构和工艺参数优化
正交实验
Vertical radial press concrete pipe machine
Molding head
Optimization of structure and process parameters
Orthogonal experiment
