Wirowski Artur, Kubacka Ewelina, Kaszubska Paulina, Walisiak Weronika
Department of Structural Mechanics, Lodz University of Technology, 93-590 Lodz, Poland.
Faculty of Civil Engineering, Architecture and Environmental Engineering, Lodz University of Technology, 93-590 Lodz, Poland.
Materials (Basel). 2024 Aug 7;17(16):3925. doi: 10.3390/ma17163925.
In this study, a numerical dynamic analysis of ceiling raster panels was performed. The analysis was conducted on panels designed with inspiration from bionics. The purpose of the analysis was to enable optimisation of the location of the holes in the designed slabs in order to achieve the preferred dynamic properties, including the natural frequencies of the slabs and an appropriate airflow to avoid the occurrence of resonance. Three different types of panels were used and a total of fifteen panels were designed in terms of their geometry, with circular, elliptical, and hexagonal perforations, made of different materials: polypropylene PP, wood, and aluminium. Then, using the finite element method and ANSYS 2023 R1 software, the airflow over the ceiling panels and their natural frequencies and vibration modes were analysed. The analysis took into account not only the shape of the openings, but also their percentage area relative to the total panel area and different airflow velocities. In addition, the results were compared in an analytical way with those obtained for a solid slab. The results obtained include findings on the mode shapes and values of the vibration frequencies of the plates, air pressure maps, histograms, and plots of the pressure dependence on the surface area of the plate openings.
在本研究中，对天花板光栅板进行了数值动态分析。该分析是针对受仿生学启发设计的面板进行的。分析的目的是优化设计板中孔的位置，以实现理想的动态特性，包括板的固有频率和适当的气流，以避免共振的发生。使用了三种不同类型的面板，根据其几何形状总共设计了十五种面板，具有圆形、椭圆形和六边形穿孔，由不同材料制成：聚丙烯PP、木材和铝。然后，使用有限元方法和ANSYS 2023 R1软件，分析了天花板面板上的气流及其固有频率和振动模式。该分析不仅考虑了开口的形状，还考虑了其相对于面板总面积的百分比面积以及不同的气流速度。此外，还将结果与实心板的分析结果进行了比较。获得的结果包括关于板的振型和振动频率值、气压图、直方图以及压力与板开口表面积的关系图的研究结果。
