钢丝绳中缺陷的描述方法

Description Method of Wire Rope Flaw

研究钢丝绳及钢丝绳中缺陷的描述方法。基于对钢丝绳结构和承载特性的分析,提出一个描述钢丝绳结构的矢量,这个矢量由6个结构参数构成,它们是股层号、股号、股的旋转角(简称股旋角)、钢丝层号、钢丝号和钢丝的旋转角(简称丝旋角)。为了引申出缺陷的描述方法,定义钢丝绳中距离的广义度量;定义钢丝、钢丝绳、断丝和磨损,钢丝用8个参数描述,它们是上述的6个结构参数和新增加的两个参数,新增加的两个参数是丝旋角变动和钢丝直径;钢丝绳定义成钢丝的集合:断丝用上述的6个结构参数和新增加的两个参数描述,新增加的两个参数是断口宽度和钢丝直径;磨损用上述的6个结构参数和新增加的两个参数描述,新增加的两个参数是丝旋角变动和磨损比。以密封钢丝绳和六股钢丝绳为例,说明该描述方法的应用。实例表明,在新描述方法的支持下,钢丝绳中的缺陷可以被抽象地用数学语言进行描述。

A novel description method is developed to study wire rope and its defects. The structure and loading performance of wire ropes are analyzed to build a structure vector of wire rope, the vector comprises six structure parameters which are the number of strand layer, the number of strand, the rotation angle of strand, the number of wire lay er, the number of wire and the rotation angle of wire. In order to explicate the description method of defects, a generalized metric of the distance in wires is defined; Wire, wire rope, broken wire and wire wear are defined. Wire is described by using eight parameters, and they are the six parameters mentioned above and two newly added parameters, i.e. the change of wire rotation angle and the diameter of wire. Wire rope is defined as a wire set. Broken wire is described by using six parameters mentioned above and two newly added parameters, i.e. the width of fracture and the diameter of wire. Wire wear is described by using the six parameters mentioned above and two newly added parameters, i.e. the change of wire rotation angle and the wear ratio. Two examples, locked-coil wire rope and six-strand wire rope, are taken to illustrate the application of this description method. The examples indicate that flaws in wire rope can be described abstractly by using mathematic language under the support of the new description method.