纤维缠绕增强复合管在内压作用下的力学行为研究

发布时间：2018-03-14 16:49

本文选题：纤维缠绕增强复合管　切入点：RTP管　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国国民经济飞速发展,能源消耗巨大,能源及时高效的供给决定我国经济能否健康可持续发展的关键因素。我国海上油气田的开发为未来的能源供给提供了新的出路,海洋管道是海上油气田的开发的重要组成部分。钢管是使用历史最长最为广泛的海洋油气运输管道,但具有耐腐蚀性差、运输及安装效率低、维修成本高的特点。纤维缠绕增强复合管(RTP管)具有很强的耐腐蚀性、良好的柔韧性、便于运输和便于安装的优点,成为了海上油气运输管道的新选择。复合管由于其结构及组成材料的复杂和特殊性、以及海洋环境的复杂性,对复合管的设计、运输和正常工作方面的分析就尤为重要。 RTP管道以热塑性材料为基体、芳纶纤维缠绕增强带为增强层,其独特的结构和复杂的材料性能使其力学表现较为特殊。本文考虑RTP管在使用过程中遭受因为运输油气的短期压力和压力的长期作用,工作环境中的管内外温度变化,对其做应力应变分析和爆破压力分析。其主要工作有以下几个方面： (1)结合RTP管的构成特点,简化为由内层、外层和增强层构成的平面力学模型,对每层材料进行简化；建立管道的平面应力模型,利用数值方法分析管道受内压时的应力应变及爆破压力,并与ABAQUS分析结果对比。 (2)在前述所建立管道计算模型的基础上,考虑管道在温度影响下受内压时,计算其的应力应变和爆破值变化规律。 (3)在前述所建立管道计算模型的基础上,使用已有文献的材料试验数据,考虑高密度聚乙烯的线性粘弹性,用数值方法和有限元方法分析管道的应力应变随时间变化规律并对比两者结果。
[Abstract]:With the rapid development of China's national economy and huge energy consumption, the timely and efficient supply of energy is the key factor to determine the healthy and sustainable development of China's economy. The development of offshore oil and gas fields in China provides a new way out for the future energy supply. Offshore pipeline is an important part of offshore oil and gas field development. Steel pipe is the longest and most widely used offshore oil and gas transportation pipeline, but it has poor corrosion resistance and low efficiency of transportation and installation. High maintenance cost. Filament wound reinforced composite pipe (RTP) has the advantages of strong corrosion resistance, good flexibility, easy transportation and easy installation. It has become a new choice for offshore oil and gas transportation pipeline. Due to the complexity and particularity of its structure and composition material and the complexity of marine environment, it is particularly important to analyze the design, transportation and normal work of composite pipe. The RTP pipe is based on thermoplastic material, and aramid filament winding reinforcements are used as reinforcing layer. Its unique structure and complex material properties make its mechanical performance more special. In this paper, the temperature variation inside and outside the RTP tube is considered because of the short-term pressure and pressure of transporting oil and gas in the working environment. The stress-strain analysis and blasting pressure analysis are carried out. The main work is as follows:. 1) according to the structural characteristics of RTP pipe, the plane mechanics model composed of inner layer, outer layer and reinforced layer is simplified, and the plane stress model of pipeline is established. The stress-strain and blasting pressure of pipeline under internal pressure are analyzed by numerical method, and the results are compared with those of ABAQUS analysis. (2) on the basis of the calculation model of pipeline established above, considering the internal pressure of pipeline under the influence of temperature, the variation law of stress and strain and blasting value of pipeline under the influence of temperature are calculated. The linear viscoelasticity of HDPE is considered on the basis of the pipe calculation model established above and using the experimental data of the materials in the literature. The variation of stress and strain with time is analyzed by numerical method and finite element method, and the results are compared.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P756.2

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