摘要
为了解决传统钹形压电复合换能器在用作传感器和驱动器时,由于存在的环向应力,导致部分输出机械能损耗及换能效率不高的问题,提出一种新型高性能钹形压电复合换能器.该压电复合换能器通过对钹形金属片沿径向切槽以释放金属片中的环向应力的方法,使压电片的机电转换能量能够充分发挥出来,以提高换能器工作性能.通过对该槽钹形压电复合换能器进行压电学及力学分析,建立了槽钹形压电复合换能器的力学理论模型,并通过对不同槽数的槽钹形压电复合换能器进行输出力、输出位移及固有频率的理论计算及有限元分析,验证了槽钹形压电复合换能器较传统钹形压电复合换能器的能量转换率提高了86%.
A new-type design, slotted cymbal, was presented to decrease the loss of output energy through releasing the tangential stress in the working original cymbal transducer. By slotting radially in the endcaps, more electrical energy was transmitted to output mechanical energy, and the properties of cymbal was improved. The resonant frequency and generated displacement and force of cymbals with different numbers of slots were calculated by using the theoretical model of slotted cymbal and the finite element analysis(FEA). Compared with cymbal transducer, the new-type slotted cymbal transducer increased the generated displacement and energy transmission by up to 86%.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2005年第4期569-573,共5页
Journal of Zhejiang University：Engineering Science
基金
国家"863"高技术研究发展计划资助项目(2001AA423130).
