38 results about "Structural acoustics" patented technology

The invention discloses a phonon function material structure containing non-convex type section holes and a making method thereof. The phonon function material structure comprises non-convex type section holes arranged periodically and is characterized in that the non-convex type section holes are formed by bulging one rectangle from the surrounding of the center of each edge of a square hole to the center of the square hole, and all edges are not mutually crossed; relative size of a non-convex section is calculated according to the requirements for structural strength and porosity (less than 50 percent); proper lattice constants are determined according to the requirement for structure acoustic characteristics; and on the basis, holes are punched in a required matrix material, symmetry of the non-convex section holes is regulated to ensure that the non-convex section holes are densely distributed in the structural cycle direction, therefore, the purpose of obtaining the phonon function material structure with a widest acoustic band gap is achieved. The invention has the advantages that the widest acoustic band gap is obtained while the requirements for the structural strength and the acoustic characteristics are met, and the phonon function material structure only comprises the non-convex section holes distributed periodically and is simple in process.