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A LOCKING-FREE FEM IN ACTIVE VIBRATION CONTROL OF A TIMOSHENKO BEAM

机译:蒂莫申科梁主动振动控制中的无锁定有限元

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摘要

In this paper we analyze the numerical approximation of an active vibration control problem of a Timoshenko beam. In order to avoid locking, we focus on the finite element method used to compute the beam vibration, to minimize it. Optimal order error estimates are obtained for the control variable, which is the amplitude of secondary forces modeled as Dirac's delta distributions. These estimates are valid with constants that do not depend on the thickness of the beam. In order to assess the performance of the method, numerical tests are reported.
机译:在本文中,我们分析了Timoshenko梁的主动振动控制问题的数值逼近。为了避免锁定,我们将重点放在用于计算梁振动的最小化有限元方法上。获得控制变量的最佳阶次误差估计,该误差是建模为狄拉克增量分布的次级力的振幅。这些估计值对不依赖于光束厚度的常数有效。为了评估该方法的性能,报告了数值测试。

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