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首页> 外文会议>IUTAM Symposium on Dynamics of Advanced Materials and Smart Structures May 20-24, 2002 Yonezawa, Japan >MODELING OF PIEZOELECTRIC / MAGNETOSTRICTIVE MATERIALS FOR SMART STRUCTURES
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MODELING OF PIEZOELECTRIC / MAGNETOSTRICTIVE MATERIALS FOR SMART STRUCTURES

机译：智能结构的压电/磁致伸缩材料建模

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摘要

The general constitutive equations of a medium where mechanical, electrical, thermal and magnetic fields interact with each other are obtained through a thermodynamic potential. Two energy functionals are used in Hamilton's principle and the finite element method is employed to obtain the general finite element equations describing the dynamic behavior of the medium. Then the constitutive and finite element equations for piezoelectricity and magnetostriction are extracted from these general constitutive and finite element equations. Finally, the performance of a piezoelectric/magnetostrictive sensor and actuator is tested in monitoring and eliminating structural vibrations of a cantilever beam structure. It is shown that both the piezoelectric and magnetostrictive sensors can monitor structural vibrations at the transient stage. For the closed-loop system response, based on the numerical modeling and results, it is concluded that both the piezoelectric and magnetostrictive actuators perform better when they are at the fixed end of the beam.
机译：通过热力学势获得机械，电场，热和磁场相互影响的介质的一般本构方程。在汉密尔顿原理中使用了两个能量泛函，并采用了有限元方法来获得描述介质动力学行为的通用有限元方程。然后从这些一般的本构和有限元方程中提取出压电和磁致伸缩的本构和有限元方程。最后，在监视和消除悬臂梁结构的结构振动时，对压电/磁致伸缩传感器和执行器的性能进行了测试。结果表明，压电传感器和磁致伸缩传感器都可以监测瞬态阶段的结构振动。对于闭环系统响应，基于数值模型和结果，可以得出结论，当压电和磁致伸缩执行器在梁的固定端时，它们的性能都更好。

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