Investigation on damaging of ropeway hauling-ropes by twisting within operation

索道运行中牵引绳扭损事故调查

• 批准号: 288233226
• 负责人: Professor Dr.-Ing. Karl-Heinz Wehking
• 金额: --
• 依托单位: Institut für Fördertechnik und Logistik (IFT)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/288233226?language=en
• 关键词: Investigation; damaging; ropeway; hauling; ropes

Running ropes, e.g. hauling ropes of bicable jigback aerial ropeways, rotate around their axis within a ride of the system. The helix-shaped structure of a rope holds the main part of this effect, which can be separated into a non-preventable portion out of physical environmental conditions and a preventable portion due to the mechanical set-up and the combination of system-parameters. This rotation can be stored in the rope as remaining twist. Within research- and service-actions of the Institute of Mechanical Handling and Logistics of the University of Stuttgart (IFT), the results of non-destructive inspections of ropeway ropes revealed that the damage development of a hauling rope cannot be inevitably explained by obvious load-zones out of the working forces or the contact to sheaves and support towers at actual state of art. Detailed analysis of wire-break development, especially the location of wire breaks, made twisting come into focus as an accelerating parameter for rope fatigue [Briem95],[Verreet05].Up to today it has not been possible to measure and image the rotation of a rope over its total travel distance and thus to create a relation to remaining twist, respectively damage behavior. Instead only visual observation had been carried out. A new sensor, which was developed by inhouse-effort and tested successfully at the IFT, now, allows recording rotation digitally in relation to time. This reveals new, yet unknown information about the dynamic rope behavior at any section of the rope. Using these data, the twisting characteristics of hauling ropes of bicable jigback aerial ropeways can be analyzed and set in relation to relevant parameters. The aim of the project is to make the relation between rotation, remaining twist and resulting damage calculable and predictable in the practical operation of ropeways. For the first time, three fields of research will be combined to an integrated model: by continuous bending-over sheave tests with twisted lang-lay ropes, the world-wide approved Feyrer-formula will be extended to these rope constructions (field 1). Theoretical investigations on rope rotation will be developed and additionally complemented and verified by rotation measurements (field 2). Finally, measurement results of non-destructive tests will be analyzed and the residual twist will be quantified (field 3). By specifying and numbering of twist-accelerating parameters in combination with typical damages of ropes known from non-destructive tests, a new calculation method will be developed to dimension ropeway hauling ropes. This is meant to helpfully support optimization of safety, rope life time performance and availability of ropeway systems.

运行绳索，例如可骑车的拼装架空索道的牵引绳索，在系统的一个行程内绕其轴旋转。绳索的螺旋形结构保持了这种效果的主要部分，它可以分为物理环境条件下的不可预防部分和由于机械设置和系统参数组合而产生的可预防部分。这种旋转可以作为剩余的捻度储存在绳子中。在斯图加特大学机械搬运和物流研究所（IFT）的研究和服务行动中，对索道绳索进行无损检测的结果表明，牵引绳索的损坏发展不能不可避免地用工作力之外的明显载荷区或与滑轮和支撑塔的接触来解释。对钢丝绳断裂发展的详细分析，特别是对钢丝绳断裂位置的分析，使得扭转成为钢丝绳疲劳加速参数的焦点[Briem95]，[Verreet05]。到目前为止，还不可能测量和成像绳子在其总移动距离上的旋转，从而创建剩余捻度的关系，分别是损坏行为。相反，只进行了目视观察。一种新的传感器，由内部努力开发，并在IFT成功测试，现在可以记录与时间有关的数字旋转。这揭示了绳索在任何部分的动态行为的新的、未知的信息。利用这些数据，可以对可折叠拼装架空索道牵引绳的扭转特性进行分析，并结合相关参数进行设置。该项目的目的是在索道的实际运行中，使旋转、剩余扭转和造成的损伤之间的关系可计算和可预测。这是第一次，三个研究领域将结合到一个综合模型中：通过使用扭曲的长绳进行连续的弯曲滑轮试验，世界范围内认可的feyer公式将扩展到这些绳索结构（领域1）。将发展绳索旋转的理论研究，并通过旋转测量进一步补充和验证（领域2）。最后，对无损检测的测量结果进行分析，并对残余捻度进行量化（领域3）。结合无损检测中已知的典型缆绳损伤，通过对缆绳扭转加速参数的规定和编号，提出了一种新的计算缆绳尺寸的方法。这有助于优化索道系统的安全性、使用寿命和可用性。