结构强度试验中真空吸盘技术研究与应用

在航空结构强度试验中通常采用的试验方法有胶布带、拉压垫及卡板加载方式。对于有些结构和试验要求有特殊性的项目,应用传统加载方式难以满足试验要求或存在较大试验实施风险。对比现有的试验加载方式特点和新的试验要求之间的矛盾,提出了一种应用真空吸盘进行结构强度试验加载的方法。对真空吸盘的工作原理进行分析、对多种吸盘进行在典型航空结构件上的静力性能测试,总结真空吸盘试验加载的特点。介绍了真空吸盘加载技术的研究及其在EC175/Z15平尾疲劳试验中的应用。对真空吸盘加载技术的系统构成、设计和试验实施过程中的相关问题进行了分析。应用实践证明真空吸盘加载技术具有安装实施方便、可靠、高效、安全,且具有无损检测便利性。

The Research and Application of Vacuum pad Technique in Structure Strength Test

Due to particularity of structure or requirements in aerostat strength tests. This paper aims to introduce a new loading method that makes up shortcomings of the routine loading techniques with canvas-pad, pull-pressure pad and lock-board. This method in our study is known as vacuum pad loading technique and we make a general instruction to this new technique through its application in EC175/Z15 horizontal stabilizer fatigue test in this paper. The test results indicated that vacuum pad loading technique has convenience during installation as well as reliability, high efficiency and security. In addition it is propitious to perform NDT.