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，例如双臂架空索道的牵引绳，在系统的行驶范围内绕其轴线旋转。绳索的螺旋形结构支撑着这种效应的主要部分，由于机械设置和系统参数的组合，这种效应可以分为物理环境条件下的不可预防部分和可预防部分。这种旋转可以作为剩余的扭度存储在绳索中。在斯图加特大学(IFT)机械装卸和物流研究所(IFT)的研究和服务行动中，对索道绳索的无损检测结果表明，牵引绳的损伤发展不能不可避免地用实际技术水平下的工作载荷或与滑轮和支撑塔的接触来解释。对钢丝断裂发展的详细分析，特别是钢丝断裂的位置，使扭度成为绳索疲劳的加速参数[Briem95]，[Verreet05]。到目前为止，还不可能测量和成像绳索在其总行程上的旋转，从而建立与剩余扭度的关系，分别破坏行为。取而代之的是只进行了肉眼观察。一种新的传感器是由内部努力开发的，并在IFT成功测试，现在可以数字记录相对于时间的旋转。这揭示了有关绳索任何部分的动态绳索行为的新的、但未知的信息。利用这些数据，可以分析和设定双绞车架空索道牵引绳的扭转特性与有关参数的关系。该项目的目的是在索道的实际运营中使旋转、保持扭矩和所造成的损伤之间的关系是可计算和可预测的。首次将三个领域的研究结合到一个综合模型中：通过连续弯曲滑轮与绞合索的试验，世界范围内认可的费耶尔公式将扩展到这些绳索结构(场1)。将开展关于绳索旋转的理论研究，并通过旋转测量对其进行补充和验证(实地2)。最后，对无损检测的测量结果进行分析，并对残余扭度进行量化(场3)。通过对扭矩加速参数的确定和编号，结合无损检测中钢丝绳的典型损伤，提出了一种索道牵引绳尺寸计算的新方法。这意味着有助于支持索道系统的安全性、绳索寿命性能和可用性的优化。