基于ANSYS的机械制螺旋缠绕PVC-U内衬管结构优化

Structural Optimization of Trenchless Rehabilitation Used Spiral-Wound PVC-U Lined Pipe Based on ANSYS

为优化机械制螺旋缠绕PVC-U内衬管的结构,提高其环刚度,基于ANSYS建立螺旋缠绕内衬管环刚度试验模型,分析不同设计参数T肋顶板厚度(a)、T肋腰宽度(b)、T肋高度(h)、圆弧半径(r)对螺旋缠绕内衬管环刚度和管材体积的影响,并结合正交试验确定最适设计参数。结果表明,按照不同设计参数对螺旋缠绕内衬管环刚度和管材体积的影响由高到低排序分别为T肋高度、T肋腰宽度、T肋顶板厚度和圆弧半径,优化后最适设计参数为a=2.5 mm、b=4.5 mm、h=28 mm、r=1.5 mm,在该条件下,螺旋缠绕内衬管环刚度与优化前相比提高了32.17%,管材体积仅增大11.43%。有限元分析结果显示,随T肋顶板厚度、T肋腰宽度和T肋高度的增加,上板压力和管材体积呈逐渐增大的趋势;随圆弧半径的增加,上板压力呈先减小后增大的趋势,管材体积基本不变。

To optimize the structure of the mechanical spiral wound PVC-U lined pipes and improve their ring stiffness.The model of spiral-wound lined pipe ring stiffness test was established based on ANSYS.Analyzed the effect of different design parameters:the T-rib upper thickness(a),the T-rib waist width(b),the T-rib height(h)and the arc radius(r)on the ring stiffness and pipe material volume of spiral-wound lined pipe.Combined with orthogonal tests to determine the optimum design parameters.The results showed that the influence of different design parameters on the ring stiffness and pipe material volume of spiral-wound lined pipes were,in descending order,the T-rib height,the T-rib waist width,the TT-rib upper thickness and the arc radius.The optimized optimum design parameters were a=2.5 mm,b=4.5 mm,h=28 mm,r=1.5 mm.Compared with previous one,the spiral-wound lined pipe ring stiffness was increased by 32.17%and the pipe material volume was increased by only 11.43%.The finite element analysis results showed that the upper plate pressure and the pipe material volume tend to increase gradually with the increase of the T-rib upper thickness,the T-rib waist width and the T-rib height.It showed that the upper plate pressure first decreased and then increased with the increase of arc radius,and the pipe material volume almost unchanged.