摘要
在总结近年来机械连接结构中螺栓轴向力测试方法的基础上,针对基于应变测量方法中应变导线出线困难且在小载荷段测量不准确的缺点,提出了一种螺栓连接结构中轴向力的测试方案。对螺栓中应变片布置方案和测量段的结构进行了设计,制造了能测量轴向力的螺栓。用连接试验分别对此测力螺栓的轴向力–应变关系的线性和重复性进行了测试研究,并将标定的测力螺栓的测量结果与轴向力理论计算结果、预紧力工程算法的计算结果进行了比较。结果表明:测力螺栓的轴向力–应变关系具有良好的线性相关性和重复性,满足作为测试设备的要求;测量结果与螺栓的理论计算结果吻合,而用预紧力工程算法计算的螺栓轴向力存在较大误差,且比实测值大。
Based on a brief survey of the test methods for axial load for joints,an instrumented bolt for axial load plan is presented to overcome the difficulty of lead outlet and the inaccurateness of the existed instrumented bolt at low load level.The stickup scheme of strain gauges and measurement part structure of the instrumented bolt for load were designed and further manufactured.The linearity and repeatability of load-strain behavior of instrumented bolt for load were experimentally investigated with joint.A brief results of instrumented bolt for axial load and theoretic calculation method,engineer calculation method are compared.The outcomes show the presented instrumented bolt for axial load satisfies the technical requirements for measuring axial load of bolts in engineering;the result of engineer calculation method is higher than the value of measuring axial load.
作者
汪厚冰
陈琳
柴亚南
WANG Houbing;CHEN Lin;CHAI Ya’nan(Aircraft Strength Research Institute of China, Xi’an 710065, China;COMAC Beijing Aeronautical Science & Technology Research Institute, Beijing 102211, China)
出处
《航空制造技术》
2018年第22期82-86,共5页
Aeronautical Manufacturing Technology
关键词
螺栓连接
轴向力
测试方法
预紧力
钉载传感器
Bolted joints
Axial force
Test measurement
Preload
Instrumented bolt for load
