As a main indicator of structural stability, the total potential energy equation for thin-walled members is widely referred to in academeic research and practical design of steel structures.
薄壁构件的总势能方程在结构稳定分析和工程设计中具有十分重要的地位和意义，是进行结构稳定计算的基础和钢结构设计规范中制定相关设计公式的依据。
By using 3-d isoparametric element, the global stiffness matrix equation for the piezoelectric laminate is obtained on the bases of minimum principle of total potential energy.
由于最小势能原理，建立了单元刚度矩阵和压电材料的整体刚度方程。
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