To install a sound insulation member in a small space and to improve weight reduction and sound insulation performance.SOLUTION: A design method for designing a sheet-like sound insulation member 10 arranged in a hollow part 13 of a hollow double wall structure 12 to posses prescribed sound insulation performance is provided. Apparent sound speed Cde-ve in the hollow part 13 of a sound wave which is made incident on the hollow double wall structure 12 is calculated as a function with an incident angle θ of the sound wave and a first interval x of a pair of lateral walls 21 and a second interval y of vertical walls as variables, and the first interval x and the second interval y are set so that the apparent sound speed Cde-ve in the hollow part 13 of the sound wave becomes a prescribed target value. Since the apparent sound speed Cde-ve in the hollow part 13 of the sound wave indicates sound insulation performance of the sound insulation member 10, the first interval x and the second interval y for achieving the apparent sound speed Cde-ve in the hollow part 13, which corresponds to required sound insulation performance, can easily be set.SELECTED DRAWING: Figure 4
【課題】遮音部材の小スペースへの設置を可能とし、かつ軽量化と遮音性能の向上とを両立させる。【解決手段】中空二重壁構造体12の中空部13に配置されるシート状の遮音部材10を、所定の遮音性能を有するように設計するための設計方法を提供する。中空二重壁構造体12に入射する音波の中空部13での見かけ音速Cde−veを、音波の入射角θ、1対の横壁21の第1間隔x及び縦壁同士の第2間隔yを変数とする関数として算出し、音波の中空部13での見かけ音速Cde−veが所定の目標値となるように、第1間隔x及び第2間隔yを設定する。音波の中空部13での見かけ音速Cde−veは遮音部材10の遮音性能を示すため、必要とする遮音性能に対応する中空部13での見かけ音速Cde−veを実現するための第1間隔x及び第2間隔yを容易に設定できる。【選択図】図4
DESIGN METHOD OF SOUND INSULATION MEMBER AND MANUFACTURING METHOD OF SOUND INSULATION WALL USING DESIGN METHOD
遮音部材の設計方法、この設計方法を用いた遮音壁の製造方法
2021-08-10
Patent
Elektronische Ressource
Japanisch
IPC: | G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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. / E04B Allgemeine Baukonstruktionen , GENERAL BUILDING CONSTRUCTIONS |
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