本文選題：海洋柔性管道　切入點(diǎn)：抗拉鎧裝鋼絲　出處：《大連理工大學(xué)》2015年碩士論文

【摘要】：海洋柔性管道是海洋油氣開發(fā)的重要裝備之一,隨著海洋油氣資源開發(fā)逐漸向深水邁進(jìn),對柔性管道的抗拉性能有了更高要求。而柔性管道結(jié)構(gòu)中主要由螺旋纏繞形式的抗拉鎧裝鋼絲提供抗拉伸能力。隨著水深加深,需要設(shè)計(jì)更厚的鎧裝鋼絲,這為抗拉鎧裝鋼絲的加工纏繞成型帶來挑戰(zhàn),需要精確預(yù)測鋼絲成型過程中的力學(xué)行為,進(jìn)而調(diào)整工藝參數(shù)。本文對海洋柔性管道抗拉鎧裝鋼絲的加工裝備與工作原理進(jìn)行分析,總結(jié)提煉出其中的關(guān)鍵技術(shù)問題,即鋼絲纏繞成型問題,并進(jìn)一步確定纏繞成型中的關(guān)鍵工藝參數(shù),即鋼絲預(yù)張力。首先建立單根鋼絲纏繞圓柱的加工理論模型,對加工預(yù)張力的上限值進(jìn)行分析。同時基于材料彈塑性,建立鎧裝鋼絲纏繞成型的三維有限元數(shù)值模型,以8寸柔性管道抗拉鎧裝鋼絲纏繞成型為例,對理論模型的合理性進(jìn)行驗(yàn)證；對滿足纏緊要求的預(yù)張力下限值范圍進(jìn)行分析,并對纏繞過程中的鋼絲應(yīng)力狀態(tài)進(jìn)行預(yù)測。此外,對鋼絲連續(xù)纏繞多個圓柱滾筒的力學(xué)行為進(jìn)行分析,對考慮塑性應(yīng)變前后的最大加工應(yīng)力進(jìn)行對比討論。本文對柔性管道抗拉鎧裝鋼絲制造過程中提出的理論及數(shù)值模型,為柔性管道抗拉鎧裝層的加工制造提供技術(shù)支撐,同時也為海洋柔性管道截面設(shè)計(jì)提供理論支持。
[Abstract]:Offshore flexible pipeline is one of the important equipments for offshore oil and gas development. The tensile resistance of flexible pipeline is higher than that of flexible pipeline. But in flexible pipeline structure, tensile resistance is mainly provided by tensile sheathed wire in spiral winding form. As the depth of water deepens, a thicker sheathed steel wire needs to be designed. This poses a challenge to the processing and winding of tensile sheathed steel wire, and requires accurate prediction of mechanical behavior during the forming process of steel wire. In this paper, the processing equipment and working principle of tensile armored steel wire for offshore flexible pipeline are analyzed, and the key technical problems, I. e., the winding forming of steel wire, are summarized and abstracted. Furthermore, the key technological parameters in winding molding, namely wire pretension, are determined. Firstly, the theoretical model of single steel wire winding cylinder is established, and the upper limit value of processing pretension is analyzed. At the same time, based on material elastoplasticity, A three-dimensional finite element numerical model for the winding forming of armored steel wire is established. The rationality of the theoretical model is verified by taking the winding forming of 8 inch flexible pipeline as an example, and the range of the lower limit of pretension to meet the requirements of winding is analyzed. The stress state of steel wire during winding is predicted. In addition, the mechanical behavior of continuous winding of several cylindrical rollers is analyzed. The maximum processing stress before and after considering plastic strain is compared and discussed. In this paper, the theory and numerical model proposed in the manufacturing process of flexible pipeline tensile armored steel wire provide technical support for the processing and manufacture of flexible pipeline tensile armor layer. At the same time, it also provides theoretical support for the section design of marine flexible pipeline.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE973.92

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本文編號：1661149