梯度功能压电材料的一组参数识别  

Parameter Identification Methods for A Functionally Gradient Piezoelectric Material

作　　者：向宏军[1] 石志飞[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2006年第1期30-34,39,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(50272003);高等学校优秀青年教师教学科研奖励计划资助项目

摘　　要：当考虑压电材料的压电参数g31,弹性参数S33和材料密度ρ沿厚度呈梯度变化时,通过测量压电材料悬臂梁在电场或横向集中力作用下梁的宏观反映(如应变、位移和电势),给出了确定这些参数分布的公式,包括g31、S33的单参数识别及体积力与联合参数识别的方法.对联合参数识别方法在常体力、材料参数S33为常数或在厚度方向呈线性变化等情况下的应用问题进行了讨论.Taking the gradient property of piezoelectric parameters g31, elastic compliance parameters S33 and density p along z direction into account, some parameter identification methods for a functionally gradient piezoelectric material are studied in the present analysis. In detail the single parameter identification for g31 or S33 as well as the multiple parameter identification for S33 and ρ are presented by the use of the strain, displacement and electrical potential of a given functionally gradient piezoelectric cantilever subjected to a concentrated force or an electric field. At the end of this paper, applications of the multiple parameter identification method are discussed in some special cases.

关 键 词：梯度功能材料 压电材料 参数识别 

分 类 号：O343.1[理学—固体力学]