内高压成形波节管作为目前应用最广换热设备,其变形特点以及成形后承载特性均备受关注.本文通过数值模拟和实验研究的方法,首先分析波节管内高压成形壁厚分布规律、成形精度以及残余应力分布情况,然后分析成形后波节管在承载时,典型区域应力应变分布情况,得出波节管在承受不同载荷时的变形特点.研究结果表明:在内高压成形过程,当整形压力为290 MPa时,成形精度较好,根部过渡区域减薄率达21.63％,且此处残余应力最大.在承载过程,当波节管承受内压力自由胀形时,波节管等效应力的最大值出现在波节根部过渡区域,此处为承载的薄弱区域；当波节管承受轴向压缩和拉伸载荷时,波峰及其附近区域与之对应的产生轴向拉应变和轴向压应变,体现出波节管具备很好的轴向位移补偿能力.
参考文献
| [1] | A. Garcia;J. P. Solano;P. G. Vicente;A. Viedma.The influence of artificial roughness shape on heat transfer enhancement: Corrugated tubes, dimpled tubes and wire coils[J].Applied thermal engineering: Design, processes, equipment, economics,2012:196-201. |
| [2] | RAI(N)IERI S;BOZZOLI F;PAGLIARINI G .Experimental investigation on the convective heat transfer in straight and coiled corrugated tubes for highly viscous fluids:Preliminary results[J].International Journal of Heat and Mass Transfer,2012,55:1-3. |
| [3] | ASM handbook committee.Metals handbook:rol14 forming andforging[M].Ohio:American Society for Metals,1993 |
| [4] | 苑世剑.现在液压成形技术[M].北京:国防工业出版社,2009 |
| [5] | YUAN S J;HE Z B;LIU G.New developments of hydroforming in China[A].Ken-ichi Manabe.[s.n.]Japan,2011:2-13. |
| [6] | EYVAZIAN A;SHAKERI M;MAHMOUDABADI M Z.Experimental study of corrugated tubes under lateral loading[A].Istanbul,Turkey,2010:233-241. |
| [7] | M. Hamada;T. Tsuda .On design formulas of U-shaped bellows[J].Journal of pressure vessel technology,1997(1):127-131. |
| [8] | Hill R.The mathematical theory ofplasticity[M].Oxford:Oxford University Press,1983 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%