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Active force control of structure-borne sound based on robust optimization subjected to an irregular cavity with uncertainties

机译:基于不确定性不规则空腔的鲁棒优化的结构声主动力控制

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摘要

AbstractThis paper proposes a novel method of structure-borne sound analysis and active force control, which combines interval mathematics and robust optimization theorems, to achieve vibration damping and noise reduction for enclosed cavity systems with bounded uncertainty. By introducing the interference principle of sound wave, responses under control can be obtained by solving finite element equations of structural–acoustic coupling systems. Through synthetical considerations of parameter dispersion in practice, the interval quantitative model, which only needs limited sample data, is defined, and the interval Taylor extension approach is employed to further determine boundary rules of responses of structural vibration and acoustic noise. On this basis, a new interval-oriented robust optimization framework is established to seek the optimal secondary force to simultaneously minimize nominal and radius levels of sound pressure indexes at concerned space and frequency domains. A complicated engineering example of the 3-D bomb cavity is eventually presented, in which numerical and experimental results can demonstrate the usage, validity and effectiveness of the developed methodology.
机译: 摘要 本文提出了一种结构声分析和主动力控制的新方法,该方法结合了区间数学和鲁棒优化定理,从而实现了封闭空间的减振和降噪有限不确定性的空腔系统。通过引入声波的干扰原理,可以通过求解结构声耦合系统的有限元方程来获得控制下的响应。通过综合考虑参数分散的实际情况,定义了仅需要有限样本数据的区间定量模型,并采用区间泰勒扩展法进一步确定结构振动和声响应的边界规则。在此基础上,建立了一个新的面向区间的鲁棒优化框架,以寻求最佳的次级力,以在相关空间和频域上同时最小化声压指标的标称和半径水平。最后给出了一个3-D炸弹腔的复杂工程实例,其中的数值和实验结果可以证明所开发方法的用途,有效性和有效性。

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