초록 ▼

The damped structural member includes a structural member and granular material in intimate contact with the member. In one embodiment the granular material is lightweight and has a bulk specific gravity of less than 1.5. When low weight is important, the granular material has a bulk specific gravit

The damped structural member includes a structural member and granular material in intimate contact with the member. In one embodiment the granular material is lightweight and has a bulk specific gravity of less than 1.5. When low weight is important, the granular material has a bulk specific gravity of less than or equal to one. The particles of the granular material are also in intimate contact with one another. The granular material may be substantially non-viscoelastic. Preferred granular material is low density polyethylene and glass microspheres. The granular material fills hollow structural members or is placed into intimate contact with open structural members. The lightweight fill effectively damps vibrational modes without excessively increasing the weight of the structural member.

대표청구항

[ What is claimed is:] [7.] Damped structural member comprising:a structural member; andgranular material having a bulk specific gravity less than 1.5 in intimate contact with the member wherein particles of the granular material are in intimate contact with each other.

[ What is claimed is:] [7.] Damped structural member comprising:a structural member; andgranular material having a bulk specific gravity less than 1.5 in intimate contact with the member wherein particles of the granular material are in intimate contact with each other.