液压与气动Issue(7)：96-102,7.DOI:10.11832/j.issn.1000-4858.2017.07.018
基于应变模态的液压卡箍松动识别与定位
Identification and Locating of Clamp-loosening Fault in Hydraulic Pipe Based on Strain Modal Analysis
谭跃刚 1余兆祥 1曲永志 1王泽超 1魏勤2
作者信息
- 1. 武汉理工大学机电工程学院,湖北武汉430070
- 2. 武汉理工大学信息工程学院,湖北武汉430070
- 折叠
摘要
Abstract
In order to detect the looseness of the clamp,an identification and locating method is proposed based on the strain modal analysis.The numerical simulation of the pipeline model is carried out to analyze the variation of the natural frequency and the strain modal under the condition of normal and loosen clamp assembly;then the experimental system based on the distributed optical fiber bragg grating sensors is designed to measure the dynamic strain.Then the experimental strain modal is constructed and the detection rule based on the strain modal is analyzed before and after looseness.The results show that the loosen clamp leads to a decrease in the natural frequency and will change the first several strain modal shapes near loose clamp significantly,which can be used to identify and locating the clamp-loosening fault.关键词
卡箍松动/固有频率/应变模态/光纤光栅Key words
clamp-loosening/natural frequency/strain modal/fiber bragg grating sensor分类
机械制造引用本文复制引用
谭跃刚,余兆祥,曲永志,王泽超,魏勤..基于应变模态的液压卡箍松动识别与定位[J].液压与气动,2017,(7):96-102,7.
