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A platform for research: civil engineering, architecture and urbanism
Dual-mode broadband ventilation and sound insulation barrier and design method thereof
The invention discloses a dual-mode broadband ventilation and sound insulation barrier and a design method thereof.The ventilation and sound insulation barrier is formed by stacking M layers of ventilation and sound insulation single-layer structures, each layer of ventilation and sound insulation single-layer structure is composed of N coupling units, and gaps for ventilation exist between the coupling units; the coupling unit is formed by rotating four 1/4 basic units composed of middle cavities and narrow pipes on the two sides and connecting the four 1/4 basic units with the narrow pipes on the two sides. The coupling unit in the ventilation and sound insulation barrier has two resonance modes, namely a resonance mode in which four 1/4 unit sound pressures are in the same phase and a resonance mode in which two input and output 1/4 unit sound pressures are in the opposite phase, and effective noise elimination can be achieved in the two modes and in the frequency range between the two modes. By designing the width sizes of the narrow tube and the middle cavity of the 1/4 basic unit, the frequency of the working mode can be adjusted. Through the design process of the invention, the size of the coupling unit is designed according to the noise requirement, and the adjustment of the working frequency is realized.
本发明公开了一种双模式宽带通风隔声屏障及其设计方法，该通风隔声屏障由M层通风隔声单层结构堆叠而成，每一层通风隔声单层结构由N个耦合单元构成，每个耦合单元之间存在用于通风的间隔，耦合单元为四个由中间腔体与两侧窄管构成的1/4基本单元旋转并连接一侧窄管而形成。该通风隔声屏障中的耦合单元具有两种共振模式，即四个1/4单元声压同相位的共振模式与输入、输出两个1/4单元声压反相位的共振模式，在这两个模式下及其之间的频率范围，能够实现有效的消声。通过对这个1/4基本单元的窄管与中间腔体的宽度尺寸进行设计，可以实现对工作模式的频率进行调节。通过本发明的设计流程，对耦合单元的尺寸根据噪声需求进行设计，实现对工作频率的调节。
Dual-mode broadband ventilation and sound insulation barrier and design method thereof
The invention discloses a dual-mode broadband ventilation and sound insulation barrier and a design method thereof.The ventilation and sound insulation barrier is formed by stacking M layers of ventilation and sound insulation single-layer structures, each layer of ventilation and sound insulation single-layer structure is composed of N coupling units, and gaps for ventilation exist between the coupling units; the coupling unit is formed by rotating four 1/4 basic units composed of middle cavities and narrow pipes on the two sides and connecting the four 1/4 basic units with the narrow pipes on the two sides. The coupling unit in the ventilation and sound insulation barrier has two resonance modes, namely a resonance mode in which four 1/4 unit sound pressures are in the same phase and a resonance mode in which two input and output 1/4 unit sound pressures are in the opposite phase, and effective noise elimination can be achieved in the two modes and in the frequency range between the two modes. By designing the width sizes of the narrow tube and the middle cavity of the 1/4 basic unit, the frequency of the working mode can be adjusted. Through the design process of the invention, the size of the coupling unit is designed according to the noise requirement, and the adjustment of the working frequency is realized.
本发明公开了一种双模式宽带通风隔声屏障及其设计方法，该通风隔声屏障由M层通风隔声单层结构堆叠而成，每一层通风隔声单层结构由N个耦合单元构成，每个耦合单元之间存在用于通风的间隔，耦合单元为四个由中间腔体与两侧窄管构成的1/4基本单元旋转并连接一侧窄管而形成。该通风隔声屏障中的耦合单元具有两种共振模式，即四个1/4单元声压同相位的共振模式与输入、输出两个1/4单元声压反相位的共振模式，在这两个模式下及其之间的频率范围，能够实现有效的消声。通过对这个1/4基本单元的窄管与中间腔体的宽度尺寸进行设计，可以实现对工作模式的频率进行调节。通过本发明的设计流程，对耦合单元的尺寸根据噪声需求进行设计，实现对工作频率的调节。
Dual-mode broadband ventilation and sound insulation barrier and design method thereof
一种双模式宽带通风隔声屏障及其设计方法
ZHANG HUI (author) / GAO SIYUAN (author) / ZHU YIFAN (author)
2024-03-15
Patent
Electronic Resource
Chinese
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