钢丝缠绕增强塑料复合管的力学性能分析与研究

发布时间：2018-03-29 13:38

本文选题：钢丝缠绕增强塑料复合管　切入点：弯曲　出处：《浙江大学》2014年硕士论文

【摘要】：钢丝缠绕增强塑料复合管(PSP)管道是一种复合管道。热塑性塑料高密度聚乙烯(PE)构成PSP管道的基体部分,高强度钢丝倾角错绕成型的网状骨架则构成PSP管道的增强层,两者之间利用高性能树脂粘结,形成一个整体,起到了很好的复合效果。PSP较为复杂的力学性能正是源于这种独特的结构,而这种结构使得PSP管道不但有钢材、塑料的优点,而且还克服了界面结合力差的缺点。结合PSP管在盘卷运输、铺设安装等环节的具体情况,本文对管道在弯曲作用和冲击作用下的力学性能展开深入研究,内容主要包括以下几个方面： (1)根据PSP管的基本结构,管道的力学模型可分为内层、外层和增强层。另外做出各层材料的简化模型,并提出PSP管道的基本理论假设。 (2)使用ABAQUS(有限元分析软件)建立在弯曲作用下管道的3D有限元模型,找出弯矩-曲率的相应关系。 (3)设计PSP管在弯曲作用下的试验,采用四点弯曲试验方法测得弯曲作用下管道下指定处的位移和加载点的力大小。此外,计算出管道的弯矩大小和弯曲曲率,并对理论分析和有限元数值模拟的精确度进行进一步的验证。 (4)PSP管道在弯曲任意加载过程中的平衡状态方程可由虚功原理求得,然后使用牛顿-拉夫逊方法对非线性方程组求解,最后利用MATLAB编制相应的计算程序,得出弯曲-曲率对应关系。 (5)将有限元、实验、理论方法分别得出的弯矩-曲率关系进行对比,并作一个总结性分析。 (6)利用ABAQUS,进行了敏感性分析分析了钢丝直径、钢丝缠绕角度、钢丝根数、管道厚度、管道直径等因素对管道抗弯曲性能的影响,通过分析各个参数对曲率和最小弯曲半径的影响,归纳并完善曲率和最小弯曲半径的工程计算公式,为管道的设计与应用提供参考。 (7)利用ABAQUS分析分别考虑材料弹塑性、弹性的PSP管和纯PE管在冲击作用下的受力情况,得出冲击力、冲击能量、变形,分析PSP管增强层缠绕钢丝对PSP管冲击的影响。
[Abstract]:The steel wire winding reinforced plastic composite pipe is a kind of composite pipe. Thermoplastic high density polyethylene (PE) makes up the base part of the PSP pipeline, and the mesh skeleton formed by the high strength steel wire inclination angle is the reinforcing layer of the PSP pipe. The use of high performance resin bonding between the two, forming a whole, played a good composite effect. The more complex mechanical properties of PSP is derived from this unique structure, and this structure makes the PSP pipeline not only have the advantages of steel, plastic, In addition, it overcomes the shortcoming of poor interfacial adhesion. Combined with the concrete situation of PSP pipe in coil transportation, laying and installation, the mechanical properties of pipeline under bending and impact are studied deeply in this paper. The content mainly includes the following aspects:. 1) according to the basic structure of PSP pipe, the mechanical model of the pipe can be divided into inner layer, outer layer and reinforcement layer. In addition, the simplified model of each layer material is made, and the basic theoretical assumptions of PSP pipeline are put forward. 2) using Abaqus (finite element analysis software) to establish 3D finite element model of pipeline under bending action, and to find out the relationship between bending moment and curvature. (3) the experiment of PSP pipe under bending action is designed. The displacement and force at the specified point under bending action are measured by four-point bending test method. In addition, the bending moment and curvature of the pipe are calculated. The accuracy of theoretical analysis and finite element numerical simulation is further verified. The equilibrium state equation of PSP pipeline under arbitrary bending loading can be obtained from the principle of virtual work. Then the Newton-Raphson method is used to solve the nonlinear equations. Finally, the corresponding calculation program is compiled by using MATLAB. The relationship between curvature and curvature is obtained. Finally, the moment curvature relation obtained by finite element method, experiment method and theory method is compared, and a summative analysis is made. Using Abaqus, the influence of steel wire diameter, wire winding angle, steel wire root number, pipe thickness and pipe diameter on the bending resistance of pipeline are analyzed. By analyzing the influence of each parameter on curvature and minimum bending radius, the engineering calculation formulas of curvature and minimum bending radius are summarized and perfected, which provides a reference for the design and application of pipeline. ABAQUS analysis is used to analyze the impact force, impact energy and deformation of elastic PSP pipe and pure PE tube under impact, respectively. The effect of PSP reinforced steel wire on the impact of PSP pipe is analyzed.
【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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