摘要
为了保证火箭贮箱结构在存储过程中的完整性,需要开发适用于低温环境的贮箱结构在役结构健康监测传感器系统。该文进行了一系列低温测试试验。首先,利用长期监测试验考察了长期处于低温环境下的压电晶片传感器和粘接剂的性能退化情况,以表征其低温耐久性;然后,利用低温/常温剪切强度试验测试了不同种类粘接剂在贮箱结构使用环境下的抗高应变性能;最后,通过不同温度(室温^-180℃)下的Lamb信号收发试验评估了不同传感器系统的低温工作性能。实验结果表明,选用的粘接剂在低温下的力学性能和耐久性较好,压电晶片传感器在低温下耐久性良好。该文设计的传感器系统可用于火箭贮箱结构低温监测。
In-situ structural health monitoring(SHM)sensor system is necessary for the long-term storage cryogenic spacecraft tanks.In this paper,a PZT Lamb-waves based SHM sensor system is designed for a long-term storage cryogenic tank.A series of tests have been conducted,First,the durability of different epoxy adhesives under cryogenic temperature was considered over a long period of time.Then,the high strain performance of different epoxy adhesives under cryogenic/room temperature was investigated by lap shear strength tests.Subsequently,the storage conditions functionality of different PZT-epoxy sensor systems was investigated by Lamb-wave propagation tests under vibration temperature environment(room temperature^-180 ℃).The experimental results demonstrated that the developed sensor system can bear high strain and long-term under cryogenic/room temperature on a long-term storage cryogenic tank.
出处
《压电与声光》
CAS
CSCD
北大核心
2017年第1期67-71,共5页
Piezoelectrics & Acoustooptics
基金
国家自然基金资助项目(91016024)
关键词
结构健康监测
火箭贮箱结构
低温
压电传感器
粘接剂
structural health monitoring
the rocket tank
low-temperature
piezoelectric sensor
adhesive
