Advanced construction technologies are creating opportunities to design and fabricate non-traditional concrete structural geometries. While removing structurally unnecessary material can aid in sustainability efforts, it can also reduce a structure’s ability to attenuate impact sound. An assessment of the impact sound insulation performance of custom concrete floors has often been excluded from previous studies because of the large computational cost for simulating radiated sound at high frequencies. In response, this paper presents a hybrid, computationally efficient method to approximate the impact sound performance of floors by strategically using the air-hemisphere method for a subset of low frequencies, while relying on the structure’s radiation efficiency at higher frequencies. This method improves upon existing strategies to discretize the receiving side of the floor for impact sound performance. To demonstrate this method, six anthropometric walking paths are simulated on four non-traditional floor geometries and three conventional floor slabs. The simulated results are compared to experimentally obtained dynamic behavior for the custom slabs and full-scale tests of impact sound for the conventional slabs. The proposed method is much more efficient than maintaining high resolution discretization across all frequencies, leading to significant computational time savings. Efficient simulations for determining the impact sound insulation of non-traditional structures may further enable the design of novel floor geometries, potentially accelerating their implementation in buildings.

中文翻译：

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一种用于评估定制混凝土地板几何形状的冲击隔音效果的高效计算方法


先进的施工技术为设计和制造非传统混凝土结构几何形状创造了机会。虽然去除结构上不必要的材料有助于实现可持续发展，但它也会降低结构衰减冲击声音的能力。由于模拟高频辐射声的计算成本很高，因此对定制混凝土地板的冲击隔音性能的评估通常被排除在以前的研究中。作为回应，本文提出了一种混合的、计算高效的方法，通过战略性地将空气半球方法用于低频子集来估计地板的冲击声性能，同时依赖于结构在较高频率下的辐射效率。这种方法改进了现有策略，将地板的接收侧离散化，以实现冲击声性能。为了演示这种方法，在 4 个非传统地板几何形状和 3 个传统楼板上模拟了 6 条人体测量步行路径。将仿真结果与实验获得的定制板的动态行为和传统板的冲击声全尺寸测试进行了比较。所提出的方法比在所有频率上保持高分辨率离散化要高效得多，从而节省了大量的计算时间。用于确定非传统结构的冲击隔音效果的高效模拟可以进一步实现新型地板几何形状的设计，从而可能加速它们在建筑物中的实施。