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A platform for research: civil engineering, architecture and urbanism
Wavy expressway phononic crystal sound barrier combining Bragg scattering and sound absorption resonance
The invention relates to a wavy expressway phononic crystal sound barrier combining Bragg scattering and sound absorption resonance. The wavy expressway phononic crystal sound barrier comprises a fixed bottom plate (1), foundation bolts (2), connecting tie beams (3), scattering sound absorbers (4) and rock wool media (5). The connecting tie beams (3) are used for connecting and fixing the adjacentscattering sound absorbers (4); the fixed bottom plate (1) is connected with, supports and fixes the scattering sound absorbers (4); the fixed bottom plate (1) is in direct contact with the ground and is connected with the ground through the foundation bolts (2). According to the invention, scattering sound absorber adopts the steel stand columns with different heights, and the steel stand columns are arranged in a square lattice mode; the sound barrier is wavy when viewed from the front and is heightened layer by layer; the scattering sound absorbers are filled with rock wool media for soundabsorption; under the combined action of a Bragg interference muffling mechanism and a resonant cavity sound absorption mechanism, the sound barrier structure of the phononic crystals can effectivelyattenuate traffic noise of 0 to 500 Hz and 800 to 1250 Hz in the main noise frequency band of an expressway to the maximum extent, so that the sound pressure level of a sound receiving point is reduced, and the noise reduction effect of the sound barrier is more effective and more targeted.
本发明涉及一种结合Bragg散射与吸声共振的波浪形高速公路声子晶体声屏障，包括固定底板(1)、地脚螺栓（2）、连接系梁（3）、散射吸声体(4)及岩棉介质（5）；连接系梁（3）连接及固定相邻散射吸声体(4)；固定底板(1)连接、支撑并固定散射吸声体(4)；固定底板(1)与地面直接接触，并采用地脚螺栓（2）连接。本发明的散射吸声体采用高度不同的钢立柱，其呈正方形晶格布置；声屏障从正面看呈波浪状，逐层增高；散射吸声体内部填充岩棉介质吸声，在Bragg干涉消声机制和共振腔吸声机制的共同作用下，声子晶体的声屏障结构能最大程度地对高速公路主要噪声频段0‑500Hz、800‑1250Hz的交通噪声进行有效衰减，从而降低受声点处的声压级，使声屏障的降噪效果更有效，更具有针对性。
Wavy expressway phononic crystal sound barrier combining Bragg scattering and sound absorption resonance
The invention relates to a wavy expressway phononic crystal sound barrier combining Bragg scattering and sound absorption resonance. The wavy expressway phononic crystal sound barrier comprises a fixed bottom plate (1), foundation bolts (2), connecting tie beams (3), scattering sound absorbers (4) and rock wool media (5). The connecting tie beams (3) are used for connecting and fixing the adjacentscattering sound absorbers (4); the fixed bottom plate (1) is connected with, supports and fixes the scattering sound absorbers (4); the fixed bottom plate (1) is in direct contact with the ground and is connected with the ground through the foundation bolts (2). According to the invention, scattering sound absorber adopts the steel stand columns with different heights, and the steel stand columns are arranged in a square lattice mode; the sound barrier is wavy when viewed from the front and is heightened layer by layer; the scattering sound absorbers are filled with rock wool media for soundabsorption; under the combined action of a Bragg interference muffling mechanism and a resonant cavity sound absorption mechanism, the sound barrier structure of the phononic crystals can effectivelyattenuate traffic noise of 0 to 500 Hz and 800 to 1250 Hz in the main noise frequency band of an expressway to the maximum extent, so that the sound pressure level of a sound receiving point is reduced, and the noise reduction effect of the sound barrier is more effective and more targeted.
本发明涉及一种结合Bragg散射与吸声共振的波浪形高速公路声子晶体声屏障，包括固定底板(1)、地脚螺栓（2）、连接系梁（3）、散射吸声体(4)及岩棉介质（5）；连接系梁（3）连接及固定相邻散射吸声体(4)；固定底板(1)连接、支撑并固定散射吸声体(4)；固定底板(1)与地面直接接触，并采用地脚螺栓（2）连接。本发明的散射吸声体采用高度不同的钢立柱，其呈正方形晶格布置；声屏障从正面看呈波浪状，逐层增高；散射吸声体内部填充岩棉介质吸声，在Bragg干涉消声机制和共振腔吸声机制的共同作用下，声子晶体的声屏障结构能最大程度地对高速公路主要噪声频段0‑500Hz、800‑1250Hz的交通噪声进行有效衰减，从而降低受声点处的声压级，使声屏障的降噪效果更有效，更具有针对性。
Wavy expressway phononic crystal sound barrier combining Bragg scattering and sound absorption resonance
结合Bragg散射与吸声共振的波浪形高速公路声子晶体声屏障
QIN XIAOCHUN (author) / YU WENSHENG (author) / HUANG ZHIHUA (author) / NI ANCHEN (author) / CAO LINHUI (author)
2020-09-29
Patent
Electronic Resource
Chinese
IPC:
E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
,
Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl.
/
G10K
Tonerzeugungsvorrichtungen
,
SOUND-PRODUCING DEVICES