1.安徽工业大学 机械工程学院,马鞍山 243032
2.安徽工业大学 创新创业学院(工程师学院)、工程实训中心,马鞍山 243032]
3.上海大学 机电工程与自动化学院,上海 200444
LIU Tao, E-mail: lt_ahut@126.com
收稿:2024-07-13,
纸质出版:2026-04-15
移动端阅览
刘涛,许文祥,蒋雅芬,等. 压电层合壳体等几何建模及分析[J]. 机械强度,2026,48(4):122-133.
LIU Tao,XU Wenxiang,JIANG Yafen,et al. Isogeometric modeling and analysis of piezoelectric laminated shells[J]. Journal of Mechanical Strength,2026,48(4):122-133.
刘涛,许文祥,蒋雅芬,等. 压电层合壳体等几何建模及分析[J]. 机械强度,2026,48(4):122-133. DOI: 10.16579/j.issn.1001.9669.2026.04.014.
LIU Tao,XU Wenxiang,JIANG Yafen,et al. Isogeometric modeling and analysis of piezoelectric laminated shells[J]. Journal of Mechanical Strength,2026,48(4):122-133. DOI: 10.16579/j.issn.1001.9669.2026.04.014.
目的
2
传统有限元法在建模过程中存在几何不精确性和单元阶次较低的问题,在处理含有曲线或曲面的复杂几何模型时,会引入逼近误差。相较而言,等几何分析方法将非均匀有理B样条(Non-Uniform Rational B-Splines
NURBS)基函数作为形函数,具备几何精确、高阶连续、高精度和无需传统网格划分过程等优势。因此,基于等几何分析方法和一阶剪切变形理论建立了一种能够精确预测压电层合壳体结构力-电行为的等几何分析模型,并进行相应分析。
方法
2
首先,利用NURBS基函数推导了Reissner-Mindlin壳单元的位移离散方程;其次,考虑材料的纤维角度,建立了从局部坐标系到全局坐标系的压电本构方程的转换关系,并采用Hamilton变分原理构建了压电层合壳体的等几何分析模型;然后,利用构建的等几何分析模型对经典壳体问题进行了分析,并将等几何分析模型的结果与已有文献和有限元软件仿真的结果进行了对比,验证了模型的精确性和高效性;最后,对机-电载荷作用下压电层合壳体的静力学和动力学响应进行了分析。
结果
2
数值结果表明,所建立的压电层合壳体的等几何分析模型具有较高的计算精度,并且同时适用于普通单层壳体、层合壳体及压电层合壳体等结构的分析。
Objective
2
The traditional finite element method suffers from geometric inaccuracy and low element order during modeling
which introduces approximation errors when dealing with complex geometric models with curves or curved surfaces. In contrast
the isogeometric analysis method employs the non-uniform rational B-splines (NURBS) basis functions as shape functions and offers advantages such as exact geometry representation
high-order continuity
high accuracy
and elimination of the traditional meshing process. Therefore
an isogeometric analysis model capable of accurately predicting the electromechanical behavior of piezoelectric laminated shell structures is to be proposed based on the isogeometric analysis method and the first-order shear deformation theory
and the corresponding analysis is to be carried out.
Methods
2
Firstly
the displacement discretization equations of the Reissner-Mindlin shell element were derived using NURBS basis functions. Secondly
considering the fiber orientation of the material
the transformation relation of the piezoelectric constitutive equations from the local coordinate system to the global coordinate system was established
and the isogeometric analysis model of piezoelectric laminated shells was constructed via Hamilton’s variational principle. Thirdly
the established isogeometric analysis model was used to analyze classical shell problems
the results of isogeometric analysis model were compared with results in the existing literature and simulation results of finite element software
and the accuracy and efficiency of the model were verified. Finally
the static and dynamic responses of piezoelectric laminated shells under electromechanical loading were investigated.
Results
2
Numerical results demonstrate that the established isogeometric analysis model for piezoelectric laminated shells achieves high computational accuracy and is simultaneously applicable to the analysis of structures such as conventional single-layer shells
laminated shells
and piezoelectric laminated shells.
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