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首页> 外文期刊>Applied Acoustics >Finite-difference time-domain analysis of the vibration characteristics of a beam-plate structure using a dimension-reduced model
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Finite-difference time-domain analysis of the vibration characteristics of a beam-plate structure using a dimension-reduced model

机译:使用降维模型对梁板结构的振动特性进行时域有限差分分析

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摘要

In order to accurately predict the vibration characteristics of structure-borne sound transmission in buildings, wave-based numerical methods are effective from the viewpoint of the modeling accuracy of the physical mechanism and the detailed geometries of the simulated field. However, because of the performance of current PCs, the prediction of real-scale problems remains difficult. In order to address such problems, we herein propose a vibration simulation method for a beam-plate structure using a dimension-reduced modeling method. The target structure is modeled as a composite structure consisting of two-dimensional plate elements and one-dimensional beam elements, which are coupled based on the implicit finite-difference approximation scheme. By applying such a low-dimensional element, a faster simulation that requires less memory, as compared with a three-dimensional discretization scheme, is made available. Good agreement between the measured and simulated results for the vibration characteristics of acrylic beam-plate models indicates the validity of the proposed method.
机译:为了精确预测建筑物中固体声传输的振动特性,从物理机制的建模精度和模拟场的详细几何形状的角度出发,基于波的数值方法是有效的。但是,由于当前PC的性能,实际问题的预测仍然很困难。为了解决这些问题,我们在此提出一种使用降维建模方法的梁板结构的振动模拟方法。目标结构被建模为由二维板单元和一维梁单元组成的复合结构,它们基于隐式有限差分近似方案进行耦合。通过应用这样的低维元素,与三维离散化方案相比,可以实现更快的仿真,该仿真需要更少的内存。丙烯酸梁板模型振动特性的测量结果与模拟结果吻合良好,表明了该方法的有效性。

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