摘要
建立了单、双晶压电梁发电能力的仿真分析模型,研究了结构尺寸、激励方式及材料性能等对其发电能力的影响规律。研究表明,在基板材料及激励条件相同时,存在不同的最佳厚度比使单、双晶压电梁发电能力最大,双晶梁的最大发电量约为单晶梁的2倍。基板材料不同时,最佳厚度比随杨氏模量比增加而减小,铝、钼基板构成的单、双晶压电梁的最佳厚度比分别为(0.7,0.35)和(0.45,0.2)。在相同的厚度比及外界激励条件下,杨氏模量比对两种压电梁发电能力的影响不同,杨氏模量比低于3.3时,双晶梁的发电量均大于单晶梁。
In order to enhance the energy-generating capability of a piezoelectric cantilever generator with given dimensions, the analysis models were established to simulate the influence of the exciting method, structural parameters as well as material properties of the piezoelectric cantilevers on energy generation. The research results show that there are different Optimal Thickness Ratios （OTRs） for the Piezoelectric Monomorph Cantilever Generator （PMCG） and Piezoelectric Bimorph Cantilever Generator （PBCG） to obtain maximal electrical energy in the same dimension and excitation, and the maximal energy generated from the PBCG is about twice as much as that from the PMCG. With the increasing of the Young＇s Modulus Ratio （YMR）, both of the OTRs of the two generators decrease. When aluminum and molybdenum plates are used for substrate, the PBCG and the PMCG achieve the OTRs of （0.7,0.35） and （0.45,0.2）, respectively. With the same thickness ratio （0.5） and external excitation, YMR exerts different influences on energy generation of the two generators, and the PB CG generates more electrical energy than the PMCG when YMR is under 3.3.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2008年第1期71-75,共5页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.50477003)
吉林省科技发展计划项目(No.20050316-2No.20070331)
关键词
压电悬臂梁
发电
建模
piezoelectric cantilever
electrical energy generation
modeling
