基于真空吸盘的新型振动加载技术研究及应用

传统的振动加载技术,试件通过刚性夹具与振动台台面进行连接,刚性夹具采用螺栓与振动台台面和试件进行连接。一些试验要求振动加载装置的连接不能破坏试件结构,传统的螺栓方式不能满足要求。本文研究了一种基于真空吸盘的新型振动加载技术,振动加载杆通过真空吸盘吸附在试件表面。该项技术已在垂尾结构的动态疲劳试验中得到应用。应用实践证明,这种基于真空吸盘的振动加载技术方便、可靠、安全,弥补了传统加载方式的不足。

Study of a New Vibration Loading Technology Based on Vacuum Grip Device and its Application

In traditional vibration loading technology, test piece is connected with vibration table top through rigid clamp, while rigid clamp is connected with test piece and vibration table top through screw bolts. But some experiments require that the connection of vibration loading device can not destroy the structure of test piece, so the traditional screw bolt connection method can not meet the requirement. A new vibration loading technology based on vacuum grip device was studied and its details are presented in this paper. In this loading method, the vibration loading rod is adsorbed on the surface of test piece through a vacuum suction cup, without any bolts. This technique has been applied in aircraft vertical fin dynamic fatigue experiment. Application practice indicates that this vibration loading technology based on vacuum grip device is convenient, reliable and safe, which makes up for the deficiency of traditional loading method.