【作者】 陈洁；

【导师】 刘晓平；

【作者基本信息】 北京邮电大学 ， 检测技术与自动化装置， 2013， 硕士

【摘要】 钢丝绳在实际生活中有着广泛的应用,它的安全与否直接关系到人员生命是否安全和生产能否正常进行。因此,急需建立钢丝绳安全评价的科学指标体系,为准确评价钢丝绳的安全性提供科学依据,确保钢丝绳安全、经济、可靠运行。本论文首先对钢丝绳的各类损伤类型和特征进行分析,其定量检测主要包括局部损伤检测和金属截面积损伤检测。重点研究局部损伤检测,通过遗传算法和径向基神经网络对漏磁信号的特征值进行分析,建立漏磁场信号与断丝损伤量值模型,实现局部缺陷定量检测,在实例分析中验证其有效性。其次,基于无损检测仪所获得的局部缺陷定量信息,判别钢丝绳的剩余强度和安全系数,为钢丝绳的安全评估提供了依据,同时根据相应的使用安全规程和报废标准开发钢丝绳状态评估系统软件,实现钢丝绳局部损伤的定量识别、剩余强度、安全系数、寿命预测等。最后总结了研究所取得的成果和不足,针对钢丝绳多种损伤类型,检测方法的可扩展性,提出进一步研究工作的基本构想。更多还原

【Abstract】 Wire rope is widely used in our daily life, its safe is directly related to life safety and normal production. Therfore, it is urgent to establish wire rope safety evaluation of scientific target system and weight system for state forecasting and estimation, to ensure the operation security and economization.Firstly, all kinds of wire rope damage types and characteristics are analyzed, localized fault and loss of metallic cross sectional area are two main quantitative detection parameters. It put emphasis on establish the model of the leakage magnetic signal and damage actual value based on genetic algorithm and the radial basis function neural network for localized fault quantitative detection. Its effectiveness is verified by instance analysis. Secondly, according to the localized fault quantitative detection results obtained by using nondestructive testing instrument, residual intensity and the safety coefficient are analysed to offer important reference for wire rope safety evaluation. A software for wire rope state evaluation based on wire rope safety regulation and scrapping standard is developed, and defect quantitative judgments residual intensity quantitative assessment、safety coefficient and life prediction are preliminary achieved.Finally,the research achievements and shortcomings are summarized. The basic idea of further research work is put forward to improve the accuracy of detection and safety assessment.更多还原