JP2008508493A5 - - Google Patents

Claims (44)

  A vibration absorber that suppresses vibration and sound radiation over a wide range of a vibrating structure, and is a matrix of at least two masses, that is, a mass associated with a distributed elastic element arranged along the region of the vibrating structure. A vibration absorber including a matrix of at least two masses spaced apart from the vibration structure with each of the distributed elastic elements.   The vibration absorber according to claim 1, further comprising an elastic material in which the distributed elastic element is embedded.   3. The vibration absorber according to claim 2, wherein the elastic material is selected from the group consisting of a foam for an acoustic device, a glass fiber for an acoustic device, a glass fiber filling, a distributed spring material, urethane and rubber.   The vibration absorber according to claim 1, wherein the distributed elastic element is selected from the group consisting of polyvinylidene fluoride, piezoelectric ceramic, metal, polymer, and electromechanical device.   The vibration absorber according to claim 2, wherein the elastic material is rubber, and the distributed elastic element is polyvinylidene fluoride.   The vibration absorber according to claim 2, wherein the elastic materials are all urethane of the same quality, and the distributed elastic element is polyvinylidene fluoride.   The vibration absorber according to claim 2, wherein the elastic material is a foam or a distributed spring material, and the distributed elastic element is polyvinylidene fluoride.   The vibration absorber according to claim 1, wherein the distributed elastic element has a waveform shape along at least one axis.   The vibration absorber according to claim 1, wherein the mass is bonded to the surface of the distributed elastic element.   The vibration absorber according to claim 1, wherein the mass is composed of discrete mass sections.   The vibration absorber according to claim 10, wherein at least two of the individual mass sections have at least one of different sizes, different shapes, and different thicknesses.   The vibration absorber according to claim 10, wherein the individual mass sections are embedded in the elastic material.   The vibration absorber according to claim 10, wherein the individual mass sections are embedded in the elastic material in at least two different planes.   The vibration absorber according to claim 10, wherein the individual mass sections include at least one mass section on one surface of the elastic material and another mass section embedded in the elastic material.   The vibration absorber according to claim 11, wherein the at least two individual mass sections are embedded in the elastic material in different planes.   12. The vibration of claim 11, wherein a first one of the two individual mass sections is on one surface of the elastic material and a second one of the two individual mass sections is embedded in the elastic material. Absorber.   The vibration absorber according to claim 1, wherein a hole is provided in the mass.   The vibration absorber according to claim 1, comprising a matrix of a plurality of masses. The vibration absorber according to claim 18, wherein the matrix includes one or more uniform geometric masses. The vibration absorber of claim 18, wherein the matrix includes one or more non-uniform geometric masses. The vibration absorber according to claim 18, wherein the matrix includes mass arrangements having different depths and different mass intervals. A method of manufacturing a vibration absorber,
A step (a) of specifying a frequency to be targeted at the time of vibration absorption operation of the vibration absorber, and a plurality of masses are arranged in a blanket with a non-uniform depth of the blanket or a non-uniform spacing between the masses. And (b) fine-tuning the vibration absorber by the blanket to the frequency specified in the step (a). The method of claim 22, wherein the blanket is composed entirely of homogeneous material. The method according to claim 22 , wherein the blanket is composed of a plurality of layers including a layer in which at least one mass is arranged at a specific position. 25. The method of claim 24, wherein the plurality of layers comprise different thicknesses and different shapes. 23. The method of claim 22 , wherein the mass is inserted into the blanket with a binder. 23. The method of claim 22, wherein the mass is mechanically inserted into the blanket. 23. The method of claim 22, wherein the individual weight of the mass is in the range of about 6 grams to 8 grams. 23. The method of claim 22 , wherein the weight of the formed vibration absorber including the mass ranges from about 300 grams to 400 grams per 16 square feet. 23. The method of claim 22, wherein the masses included in the blanket are masses of various sizes and weights. A vibration absorber,
Three-dimensional foam material,
A plurality of masses distributed at a specific position in the xy plane of the three-dimensional foam material and a specific depth in the z-axis direction of the three-dimensional foam material, the specific position and the specific depth And a plurality of masses that provide vibration suppression at specific frequencies due to physical and chemical attributes of the foam material. The method according to claim 31, wherein the three-dimensional foam material is constituted by a plurality of foam material layers. 32. The method of claim 31 , wherein each of the plurality of masses is inserted into an opening in the three-dimensional foam material. 34. The method of claim 33 , further comprising a foam cover covering each of the masses in each of the apertures. 32. The method of claim 31 , wherein at least some of the plurality of masses are metal. 32. The method of claim 31 , wherein at least some of the plurality of masses are gels, liquids or fibers. A heterogeneous material to reduce vibration and sound,
With foam material,
A continuous or semi-continuous mass layer embedded in the foam material;
A heterogeneous material comprising various locations along the length or width direction in the foam material and one or more masses disposed at various depths in the foam material. 38. The heterogeneous material of claim 37, wherein the foam material comprises a multilayer structure. 38. The heterogeneous material of claim 37, wherein the continuous or semi-continuous mass layer is segmented along its length. 40. The heterogeneous material of claim 39, wherein the material is bendable at the segmented location. 38. The heterogeneous material of claim 37, wherein the one or more embedded masses are positioned on opposite sides of the continuous or semi-continuous mass layer. 38. The heterogeneous material of claim 37, wherein the one or more embedded masses are on the same side of the continuous or semi-continuous mass layer. 38. The heterogeneous material of claim 37, wherein the continuous or semi-continuous mass layer is a metal layer. 38. The heterogeneous material of claim 37, wherein the embedded mass comprises different sizes and shapes.