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Active Transient Sound Radiation Control from a Smart Piezocomposite Hollow Cylinder

机译：智能压电复合空心圆柱体的主动瞬态声辐射控制

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摘要

The linear 3D piezoelasticity theory along with active damping control (ADC) strategy are applied for non-stationary vibroacoustic response suppression of a doubly fluid-loaded functionally graded piezolaminated (FGPM) composite hollow cylinder of infinite length under general time-varying excitations. The control gain parameters are identified and tuned using Genetic Algorithm (GA) with a multi-objective performance index that constrains the key elasto-acoustic system parameters and control voltage. The uncontrolled and controlled time response histories due to a pair of equal and opposite impulsive external point loads are calculated by means of Durbin's numerical inverse Laplace transform algorithm. Numerical simulations demonstrate the superior (good) performance of the GA-optimized distributed active damping control system in effective attenuation of sound pressure transients radiated into the internal (external) acoustic space for two basic control configurations. Also, some interesting features of the transient fluid-structure interaction control problem are illustrated via proper 2D time domain images and animations of the 3D sound field. Limiting cases are considered and accuracy of the formulation is established with the aid of a commercial finite element package as well as comparisons with the current literature.
机译：线性3D压电弹性理论与主动阻尼控制（ADC）策略一起用于在一般时变激励下无限长的双流体加载的功能梯度压电复合（FGPM）无限长空心圆柱的非平稳振动声响应抑制。使用遗传算法（GA）识别和调整控制增益参数，该遗传算法具有一个多目标性能指标，该指标约束了关键的弹性声学系统参数和控制电压。利用杜宾的数值拉普拉斯逆变换算法，计算了由于一对相等且相反的脉冲外部点载荷而产生的不受控制和受控制的时间响应历史。数值模拟表明，对于两种基本控制配置，GA优化的分布式主动阻尼控制系统在辐射到内部（外部）声学空间的声压瞬变的有效衰减方面具有优越的（良好）性能。同样，通过适当的2D时域图像和3D声场的动画，说明了瞬态流体-结构相互作用控制问题的一些有趣特征。考虑到极限情况，并借助商业有限元软件包以及与现有文献的比较来确定配方的准确性。

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