牵引用编织钢丝绳弯曲状态下力学特性研究

发布时间：2018-05-12 18:46

本文选题：编织型钢丝绳 + 弯曲状态　；参考：《济南大学》2017年硕士论文

【摘要】：编织型钢丝绳因其不旋转特性作为牵引绳被广泛应用于张力架线施工中,成为施工必备且重要的工器具之一,其力学性能分析对安全施工至关重要。分析张力架线过程表明,钢丝绳在经过牵引卷筒时,其受力状况最为复杂且是最易发生危险的位置之一,由于卷筒的牵引卷绕作用,钢丝绳受到拉、弯、扭、压等力的复合作用,因此,有必要基于牵引工况对编织钢丝绳卷绕弯曲状态下的力学特性进行研究。本文以四方八股编织钢丝绳为例,对其进行弯曲状态下的数学模型构建,以钢丝绳经过牵引卷筒时的弯曲受力状态为工况,进行其弯曲状态下的应力及变形分布探究。具体研究内容如下:针对四方八股编织钢丝绳,分析其在平直状态下的空间结构及绳股、钢丝之间的相位关系,探讨其处于弯曲状态时绳股及股内钢丝在整绳中的位置变化,确定该状态下绳股及钢丝之间相关参数之间的关系,通过坐标变换及微分学理论建立其弯曲状态下绳股及股内钢丝的螺旋线方程,即卷绕弯曲状态数学模型。在此基础上分析其几何特征,借助MATLAB软件计算并获得编织钢丝绳弯曲状态下绳股及侧线钢丝的曲率变化特性。基于四方八股编织钢丝绳弯曲状态下的数学模型,以YS9-8×19编织钢丝绳为例,在三维软件SolidWorks中建立其卷绕弯曲状态下的几何模型,同时建立牵引卷筒的简化几何模型,进而组合完成“绳-轮”牵引卷绕系统整体模型的建立。根据张力架线实际工况,确定数值模拟的载荷及约束,完成“绳-轮”牵引卷绕系统的有限元模型构建并进行数值模拟。分析数值模拟结果,获得拉伸力作用下编织钢丝绳绕过牵引卷筒时钢丝绳绳股应力及变形的分布规律;通过不同摩擦系数设置,仿真分析摩擦系数对其弯曲状态应力及变形的影响;同时对不同节距下的模型进行模拟,获得不同节距、同种边界条件下钢丝绳卷绕弯曲状态应力分布,并分析确定该工况下最佳钢丝绳节距。以YS9-8×19编织钢丝绳为例,对其进行卷绕弯曲状态拉伸试验。试验从定性和定量分析的角度确定两种方案,定量分析通过将同种载荷下的弯曲拉伸试验伸长量与模拟伸长量进行对比;定性分析则是将编织钢丝绳卷绕弯曲状态拉伸试验所出现的断裂位置与其卷绕弯曲状态数值模拟所得到的应力最大点位置相比较。通过上述试验,验证编织钢丝绳卷绕弯曲状态数学模型及几何模型的合理性,以及“绳-轮”牵引卷绕系统数值模拟的可行性。
[Abstract]:The braided wire rope is widely used in the construction of tension wire because of its non-rotation characteristics, and becomes one of the necessary and important workpieces in construction. The analysis of its mechanical properties is very important to the safe construction. The analysis of the tension stringing process shows that when the wire rope passes through the traction reel, its stress condition is the most complex and one of the most dangerous positions. Because of the traction winding action of the reel, the wire rope is pulled, bent and twisted. Therefore, it is necessary to study the mechanical properties of braided wire rope under winding and bending based on the traction condition. In this paper, the mathematical model of square eight strands braided wire rope under bending condition is constructed, and the distribution of stress and deformation in bending state of wire rope is studied by taking the bending force state of wire rope as the working condition when it passes through the traction drum. The specific research contents are as follows: in view of the square eight strands of braided wire rope, the spatial structure and the phase relationship between the rope strands and the steel wire in the straight state are analyzed, and the position changes of the rope strands and the steel wire inside the strands in the whole rope when they are in the bending state are discussed. The relationship between the relative parameters of rope strands and steel wire in this state is determined. The helix equation of rope strands and wire in the bending state is established by coordinate transformation and differential calculus theory, that is, the mathematical model of winding and bending state. On this basis, the geometric characteristics of the wire are analyzed, and the curvature characteristics of the wire strands and side wire under the bending state of the braided wire rope are calculated and obtained by using MATLAB software. Based on the mathematical model of square eight strands braided wire rope under bending state, taking YS9-8 脳 19 braided wire rope as an example, the geometric model under winding and bending state is established in the 3D software SolidWorks, and the simplified geometric model of traction reel is established at the same time. Then the whole model of the rope-wheel traction winding system is established. According to the actual working condition of the tension wire, the load and constraint of the numerical simulation are determined, and the finite element model of the "rope wheel" traction winding system is constructed and numerically simulated. By analyzing the results of numerical simulation, the distribution of stress and deformation of wire rope strands in weaving wire rope around the traction drum under tensile force is obtained, and the different friction coefficient is set up. The influence of friction coefficient on the bending state stress and deformation is analyzed, and the stress distribution of wire rope under the same boundary condition is obtained by simulating the models under different pitch. The optimum pitch of wire rope under this working condition is analyzed and determined. Taking YS9-8 脳 19 braided wire rope as an example, the winding and bending state tensile test of the wire rope was carried out. The two schemes were determined from the qualitative and quantitative analysis. Quantitative analysis was carried out by comparing the bending tensile test elongation under the same load with the simulated elongation. The qualitative analysis is to compare the fracture position of the braided wire rope with the position of the maximum stress obtained by numerical simulation of the winding bending state of the braided wire rope. Through the above experiments, the rationality of the mathematical model and geometric model of the winding state of braided wire rope is verified, and the feasibility of the numerical simulation of the "rope wheel" traction winding system is also verified.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG356.45

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