초록 ▼

A circumferential rib-stiffened hollow cylinder and method for fabrication thereof featuring construction of the cylinder from complementarily shaped nestled prefabricated rings and resultant circumferential ribs which are integral with the rest of the cylinder. In one embodiment ring sections which

A circumferential rib-stiffened hollow cylinder and method for fabrication thereof featuring construction of the cylinder from complementarily shaped nestled prefabricated rings and resultant circumferential ribs which are integral with the rest of the cylinder. In one embodiment ring sections which are “L”-shaped in cross-section are axially and sequentially mated; ring sections which are “U”-shaped are axially and correspondingly integrated therewith, therein for a cylinder having internal circumferential ribs and thereout for a cylinder having external circumferential ribs. The dominant load path for the cylinder is through the reinforced cylinder elements, and the cylinder\s wall-thickness-to-diameter ratio is effectively reduced, thereby allowing radial reinforcement of the ribs, reducing residual stresses and increasing strength; these advantages are especially significant for cylinders which are composite or are to be subjected to hydrostatic pressure. Moreover, in comparison with conventional cylinders of monocoque construction, manufacture and quality control may be expected to be more economical and cost-effective.

대표청구항 ▼

A method for fabricating an internally circumferentially rib-stiffened hollow cylinder, comprising: axially and sequentially mating a plurality of L-rings; each said L-ring having a circumferentially planar outer L-wall, an L-bend interface and a radially planar inner L-wall defining in outwardly ra

A method for fabricating an internally circumferentially rib-stiffened hollow cylinder, comprising: axially and sequentially mating a plurality of L-rings; each said L-ring having a circumferentially planar outer L-wall, an L-bend interface and a radially planar inner L-wall defining in outwardly radial cross-section an approximate inverted “L”-shape; said circumferentially planar outer L-wall having an outer L-edge, an outer interior L-surface and an outer exterior L-surface; said radially planar inner L-wall having an inner L-edge, an inner interior L-surface and an inner exterior L-surface; whereby each said L-ring other than the sequentially last said L-ring is overlappingly aligned with a sequentially succeeding said L-ring so as to have flush a portion of said outer interior L-surface which is bounded by said outer L-edge with a portion of said outer exterior L-surface of said sequentially succeeding said L-ring which is bounded by said L-bend interface; and axially and correspondingly integrating within said L-rings a plurality of U-rings; each said U-ring having a circumferentially planar outer U-wall, a pair of U-bend interfaces and a pair of radially planar inner U-walls defining in outwardly radial cross-section an approximate inverted “U”-shape; said circumferentially planar outer U-wall having an outer interior U-surface and an outer exterior U-surface; each said radially planar inner wall having an inner U-edge, an inner interior U-surface and an inner exterior U-surface; whereby each said U-ring other than the sequentially last said U-ring is adjacently aligned with a sequentially succeeding said U-ring so as to have flush said outer exterior U-surface with a portion of one said outer interior L-surface, one said inner exterior U-surface with said inner interior L-surface of same said L-ring, and the other said inner exterior U-surface with said inner exterior L-surface of said sequentially succeeding L-ring; said sequentially last said U-ring having flush said outer exterior U-surface with a portion of one said outer interior L-surface and one said inner exterior U-surface with one said inner interior L-surface of same said L-ring.