Verification and Improvement of a Novel Vibration-based Damage Identification Approach

一种新颖的基于振动的损伤识别方法的验证和改进

• 批准号: 404918-2010
• 负责人: Taheri, Farid
• 金额: $ 0.19万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=488632
• 关键词: Verification; Improvement; Novel; Vibration; based

Pipelines used in oil and gas, as well as in chemical and nuclear industries are joined together by mechanical (bolted), welded or adhesively bonded joints. The integrity of the joints present in such systems is very critical, since their failure could result in devastating economical and environmental ramifications. Therefore, structural health monitoring (SHM) of such joints is of critical and paramount importance. One of the recent advances in SHM has been the development of vibration-based methods. Significant efforts have been expended in recent years in developing techniques that can reliably detect damage in structures using various vibration-based methods. Nonetheless, research in this area has demonstrated that most vibration-based techniques are mainly suitable for detecting global damage (those primarily affecting the global dynamics of the system), and cannot detect local damage (such as cracks in joints or bolt loosening.)

石油和天然气以及化学和核工业中使用的管道通过机械（螺栓连接），焊接或粘接接头连接在一起。 这种系统中存在的接头的完整性是非常关键的，因为它们的故障可能导致破坏性的经济和环境后果。 因此，结构健康监测（SHM）的这种节点是至关重要的。 SHM的最新进展之一是基于振动的方法的发展。 近年来，在开发能够使用各种基于振动的方法可靠地检测结构中的损伤的技术方面已经花费了大量的努力。 尽管如此，这一领域的研究表明，大多数基于振动的技术主要适用于检测全局损伤（主要影响系统的全局动力学的损伤），而不能检测局部损伤（如接头裂纹或螺栓松动）。