含能材料2026，Vol.34Issue(8)：970-979,10.DOI:10.11943/CJEM2025257
基于叠片换能器的固体火箭推进剂超声检测技术研究
Research on Ultrasonic Detection Technology for Solid Rocket Propellant with Laminated Transducers
摘要
Abstract
To address the issue of significant attenuation and strong scattering of ultrasonic waves in solid propellants,which pre-vents existing ultrasonic transducers from detecting all internal defects,a nondestructive testing research method using ultrasonic laminated transducers is proposed.Based on the research of domestic and international scholars,this study first proposes leverag-ing the high transmission energy characteristic of laminated transducers to mitigate attenuation and scattering problems during ul-trasonic propagation in solid rocket propellants.A 1 MHz four-layer ultrasonic transducer is designed.This transducer converts a planar acoustic field into a cylindrical acoustic field through crystal stacking,thereby enriching echo information and improving defect resolution.Based on acoustic field simulations of the ultrasonic laminated transducer,a 1 MHz four-layer ultrasonic trans-ducer is developed.Experimental comparisons with domestic and international transducers of similar specifications show a 20 dB improvement in gain.Finally,an ultrasonic automated inspection system for solid rocket propellants is established,enabling on-line inspection of solid rocket propellants.The results indicate that the developed inspection equipment can accurately detect the smallest artificial blind holes measuring Φ1.2 mm×5 mm(depth)as well as natural inclusion defects,achieving qualitative and quantitative nondestructive testing of all internal defects in solid rocket propellants.关键词
固体火箭推进剂/超声叠片换能器/检测增益/人工孔/自然夹杂Key words
solid rocket propellant/ultrasonic laminated transducer/detection gain/artificial hole/natural defect分类
军事科技引用本文复制引用
杨顺民,陈以方,胡陈君,刘康驰,李杰,田宇涛,周晨举..基于叠片换能器的固体火箭推进剂超声检测技术研究[J].含能材料,2026,34(8):970-979,10.基金项目
国家自然科学基金(62401525) National Natural Science Foundation of China(No.62401525) （62401525）
