Huanhuan YAN, Wenbin NI, Junfei WU, Xiaojun PAN, Jian ZHOU, Wanfang YAN, Sen LIU, Tiejin WANG, Jiang ZHANG
DOI Number: 10.60853/q6fn-4r87
Conference number: HiSST2024-00354
In subsonic and supersonic wind tunnel tests, the commonly used tail brace is a typical concentrated mass cantilever beam structure. In transonic and supersonic flow, the airflow and model support system sometimes undergo severe coupling vibration, and the alternating vibration of the model can have a very adverse impact on the accuracy of the balance measurement system and the reliability and lifespan of the support system. Passive vibration suppression using non Newtonian materials and tungsten steel support rods, and active vibration suppression using piezoelectric ceramics to achieve the best vibration suppression effect. Due to the advantages of high energy density and rapid response of piezoelectric ceramic materials, the use of piezoelectric ceramic actuators as active vibration suppression technology for wind tunnels has become a research hotspot. Based on the principle of variable stiffness active vibration suppression, an active and passive vibration suppression system was designed in the FD-12 wind tunnel using stacked piezoelectric ceramic actuators. The main purpose of the system is to solve the serious vibration problems that occur in the model during transonic testing. Based on the analysis of key techniques in model vibration, the design optimization of the layout of the vibration suppressor was achieved. The feasibility of this design method and the performance of the entire vibration suppression system were verified through ground and wind tunnel tests. The test results showed that the vibration suppression system can suppress the impact vibration of the model’s supersonic switching vehicle and the vibration caused by aerodynamic structure coupling, and effectively improve the available attack angle of the test, providing a reliable testing technology for the model’s supersonic test.