压电悬臂梁发电装置的建模与仿真分析

压电悬臂梁发电装置的建模与仿真分析 Modeling and simulation of piezoelectric cantilever generators 阚君武 first-author 吉林大学 吉林大学 吉林大学 吉林大学 为提高一定尺度压电复合悬臂梁（简称压电梁）的发电能力，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（基板与压电材料的）杨氏模量比的增加而减小，铝、钼基板构成的单／双晶压电梁的最佳厚度比分别为（0.7，0.32）和（0.45，0.2）。在相同的厚度比（0.5）及外界激励条件下，杨氏模量比对两种电梁发电能力的影响不同，杨氏模量低于3.3时，双晶梁的发电量均大于单晶梁。 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 ratio (OTR) for the piezoelectric monomorph cantilever generator (PMCG) and piezoelectric bimorph cantilever generator (PBCG) to obtain maximal electrical energy using the same dimension and excitation, and the maximal energy generated from the PBCG is about 2 times that from the PMCG. With the increasing of the Young’s modulus ratio (YMR), the OTRs of the two generators all decrease. When aluminum and molybdenum plates are used for substrate, the PBCG and PMCG achieve the OTR of (0.7,0.32) and (0.45,0.2), respectively. With the same thickness ratio (0.5) and external excitation, YMR exerts different influence on energy generation of the two generators, and the PBCG generates more electrical energy than the PMCG when YMR is under 3.3. 2007-03-16 2007-06-07 2008-01-22 2008-01-22 2020-08-11 1 16