發(fā)布時(shí)間：2018-05-01 12:11

  本文選題：柔性管道骨架層 + 輥彎成形�。� 參考：《大連理工大學(xué)》2015年碩士論文

【摘要】：隨著陸地資源的逐漸消耗和海洋資源開(kāi)采技術(shù)的飛速發(fā)展,海洋油氣運(yùn)輸管道的需求量日益增加。由于柔性管道有著許多普通運(yùn)輸管道無(wú)法具備的優(yōu)異性能,在很多海洋開(kāi)采工程中必須或優(yōu)先考慮使用柔性管道。柔性管道由多層金屬鎧裝層以及多層聚合物層組成,骨架層(carcass)作為最內(nèi)層,需要在滿足一定柔性的前提下防止由于外層壓力導(dǎo)致的內(nèi)層聚合物層的壓潰現(xiàn)象,其結(jié)構(gòu)是一種特定型材螺旋纏繞的互鎖金屬結(jié)構(gòu)。骨架層的制造工藝十分復(fù)雜,是柔性管道生產(chǎn)中的核心技術(shù)之一。本文采用有限元仿真方法研究了骨架層的制造工藝,探討了柔性管道骨架層成形的關(guān)鍵技術(shù)。制造骨架層的核心技術(shù)是輥彎成形工藝。本文基于輥彎成形過(guò)程中板帶與軋輥的接觸情況,建立了描述板帶變形特征的數(shù)學(xué)模型,該模型可以預(yù)測(cè)彎曲角分布和縱向應(yīng)變變化情況。結(jié)果表明：板帶的縱向應(yīng)變大小與變形截面以及軋輥尺寸有關(guān),縱向應(yīng)變?cè)诘来沃g呈現(xiàn)先升高后降低規(guī)律,峰值出現(xiàn)在第一接觸點(diǎn)處；隨著邊腿長(zhǎng)度的增加,縱向應(yīng)變期初呈增加,隨后呈降低,拐點(diǎn)出現(xiàn)在邊腿長(zhǎng)度為約12mm處；縱向應(yīng)變峰值隨著軋輥半徑的增加而減小。為探索合理的板帶成形有限元模擬參數(shù),本文運(yùn)用有限元軟件MARC/mentat 2012進(jìn)行了三道次U型型材的輥彎成形模擬和Ti-6A1-4V板料的自由彎曲回彈模擬,并將模擬結(jié)果與實(shí)驗(yàn)結(jié)果進(jìn)行了對(duì)比分析。結(jié)果表明：所選擇的模擬參數(shù)能夠較好模擬板材的折彎變形特征；實(shí)體殼單元(M-RESS)在模擬板帶折彎成形,尤其在需要預(yù)測(cè)回彈時(shí),有良好的表現(xiàn)；合理的網(wǎng)格劃分和厚度方向積分點(diǎn)數(shù)的選擇對(duì)回彈值的預(yù)測(cè)有著很大影響。在參考已有輥彎成形原理的基礎(chǔ)上,設(shè)計(jì)了骨架層的成形輥花圖,采用經(jīng)論證的模擬參數(shù),建立了骨架層輥彎成形的有限元模型。根據(jù)成形的模擬結(jié)果進(jìn)行輥花圖的參數(shù)反饋與優(yōu)化,最終確定出合理的工藝設(shè)計(jì)方案。此外,還進(jìn)行了鎖扣壓輪組的設(shè)計(jì),并給出了鎖扣機(jī)的簡(jiǎn)要整體三維造型,為柔性管道骨架成形設(shè)計(jì)與制造提供技術(shù)依據(jù)。
[Abstract]:With the gradual consumption of land resources and the rapid development of marine resource mining technology, the demand of offshore oil and gas transportation pipeline is increasing day by day. Due to the excellent performance of many ordinary transportation pipelines, flexible pipelines must be used or given priority in many marine mining projects. The flexible pipeline consists of multi-layer metal armor layer and multi-layer polymer layer, and the skeleton layer carcassas is the innermost layer. It is necessary to prevent the inner polymer layer from collapsing due to outer pressure under certain flexibility. Its structure is a kind of interlocking metal structure with special profile spiral winding. The manufacturing process of skeleton layer is very complex and is one of the core technologies in flexible pipeline production. In this paper, finite element simulation method is used to study the manufacturing process of skeleton layer, and the key technology of forming flexible pipeline skeleton layer is discussed. The core technology of manufacturing skeleton layer is roll forming process. Based on the contact between strip and roll during roll bending, a mathematical model describing the deformation characteristics of plate and strip is established. The model can predict the distribution of bending angle and the variation of longitudinal strain. The results show that the longitudinal strain of plate and strip is related to the deformation section and roll size. The longitudinal strain increases first and then decreases between passes, the peak value appears at the first contact point, and with the length of side leg increasing, The longitudinal strain increases at the beginning of the period, then decreases, and the inflection point appears at the side leg length of about 12mm, and the peak value of the longitudinal strain decreases with the increase of the roll radius. In order to explore the reasonable finite element simulation parameters of strip forming, the roll forming simulation of three times U-shaped profile and the free bending springback simulation of Ti-6A1-4V sheet metal were carried out by using the finite element software MARC/mentat 2012. The simulation results are compared with the experimental results. The results show that the selected simulation parameters can well simulate the bending deformation characteristics of the plate, and the solid shell element M-RESS has a good performance in simulating strip bending forming, especially when the springback prediction is needed. Reasonable mesh division and the selection of integral points in thickness direction have great influence on the prediction of springback value. Based on the principle of roll bending, the forming roll pattern of skeleton layer is designed, and the finite element model of roll bending forming of skeleton layer is established by using the proved simulation parameters. According to the result of forming simulation, the parameter feedback and optimization of roll pattern are carried out, and the reasonable process design scheme is finally determined. In addition, the design of lock press wheel set is carried out, and the brief 3D modeling of lock machine is given, which provides the technical basis for the design and manufacture of flexible pipeline skeleton.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE973

【共引文獻(xiàn)】

相關(guān)期刊論文 前6條

1 王世鵬;韓飛;;變截面輥彎回彈機(jī)理研究[J];鍛壓技術(shù);2013年05期

2 祁宏偉;韓飛;;雙直立鎖邊板的輥彎成形數(shù)值模擬與工藝研究[J];鍛壓裝備與制造技術(shù);2014年06期

3 錢波;李強(qiáng);黃志高;;柔性輥彎成型可變時(shí)域離散插補(bǔ)控制[J];華中科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年12期

4 Song Feifei;Yang He;Li Heng;Zhan Mei;Li Guangjun;;Springback prediction of thick-walled high-strength titanium tube bending[J];Chinese Journal of Aeronautics;2013年05期

5 馮楊;蘭鳳崇;阮鋒;;基于補(bǔ)償因子的復(fù)雜型面零件沖壓回彈控制研究與應(yīng)用(第Ⅰ部分:理論)[J];塑性工程學(xué)報(bào);2014年06期

6 趙玉璋;王凱;王武榮;韋習(xí)成;;高強(qiáng)度雙相DP780鋼板沖壓成形的變摩擦系數(shù)模型及其應(yīng)用[J];上海交通大學(xué)學(xué)報(bào);2015年10期

相關(guān)博士學(xué)位論文 前2條

1 付志強(qiáng);異形管連續(xù)輥彎成型工藝及計(jì)算機(jī)輔助設(shè)計(jì)系統(tǒng)研究[D];燕山大學(xué);2014年

2 李貴;面向產(chǎn)品設(shè)計(jì)的回彈模擬與幾何補(bǔ)償方法研究[D];華中科技大學(xué);2014年

相關(guān)碩士學(xué)位論文 前10條

1 葉奔;冷彎軋輥設(shè)計(jì)與工藝參數(shù)優(yōu)化的研究[D];武漢科技大學(xué);2011年

2 王世鵬;變截面輥彎成形缺陷機(jī)理研究[D];北方工業(yè)大學(xué);2013年

3 張魯漢;鋼制車輪輪輞滾形工藝數(shù)值模擬研究[D];山東大學(xué);2013年

4 胡星星;板金屬滾壓成型回彈預(yù)測(cè)與穩(wěn)健性優(yōu)化設(shè)計(jì)技術(shù)研究[D];浙江大學(xué);2013年

5 余燦生;C95級(jí)ERW耐腐蝕油井管成分及熱處理工藝研究[D];昆明理工大學(xué);2013年

6 李世云;超高強(qiáng)度鋼BR1500HS熱成形及回彈預(yù)測(cè)[D];重慶大學(xué);2013年

7 朱取才;汽車B柱加強(qiáng)板拉延成形性及回彈控制研究[D];合肥工業(yè)大學(xué);2013年

8 孫世巖;基于CATIA的高強(qiáng)鋼板回彈幾何補(bǔ)償算法研究與系統(tǒng)開(kāi)發(fā)[D];華中科技大學(xué);2013年

9 張寶;門框板型鋼輥彎成形工藝與回彈控制技術(shù)研究[D];南京理工大學(xué);2014年

10 鄧慶;φ610HFW直縫焊管機(jī)組成型工藝參數(shù)轉(zhuǎn)化的研究[D];東北大學(xué);2011年

，

本文編號(hào)：1829296