{
  "$type": "site.standard.document",
  "description": "A structural panel assembly including an array of unit cell assemblies. Each unit cell assembly includes: an outer frame member spaced apart from an inner frame member; a plurality of quasi-zero stiffness (QZS) spring members disposed between the inner frame member and the outer frame member; a…",
  "path": "/patents/1372992",
  "publishedAt": "2025-01-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G10K11/172",
    "Volvo Car Corporation"
  ],
  "textContent": "A structural panel assembly including an array of unit cell assemblies. Each unit cell assembly includes: an outer frame member spaced apart from an inner frame member; a plurality of quasi-zero stiffness (QZS) spring members disposed between the inner frame member and the outer frame member; a phononic crystal disposed between the inner frame member and the outer frame member; and a plurality of locally-resonating phononic crystals (LRPC) spring members disposed between the phononic crystal and one or more of the inner frame member and the outer frame member. The phononic crystal acts as a scattering phononic crystal (SPC) for attenuating high-frequency sound waves within the unit cell assembly and as a vibrating mass for the LRPC spring members for attenuating low-frequency sound waves within the unit cell assembly by converting the low-frequency sound waves to heat by vibration.",
  "title": "UNIT CELL AND STRUCTURAL PANEL ASSEMBLIES WITH ENHANCED IMPACT AND NOISE ABSORPTION CHARACTERISTICS"
}