Polar-oriented lattice isogrid for circular structures

摘要

A new adaptable grid or lattice structure identified by the coined term “polargrid” is disclosed. A polargrid may be designed or engineered to fill any space between two generally circular structures and where the ribs will intersect with both circular structures at a node. The intersection of a polargrid with a circular structure will not occur mid-rib. Rather, a polargrid can be designed to always have ribs terminate at an inner or outer circular structure at a node. Polargrids have particular applicability in cylindrical structures or when interconnecting concentric circular or cylindrical structures that may or may not be co-planar.

主权项

1. A lattice grid structure comprising:
a. A first hoop having a substantially constant first diameter; b. A second hoop having a substantially constant second diameter, wherein the second diameter is less than the first diameter; c. A third hoop having a substantially constant third diameter, wherein the third diameter is less than the second diameter; d. A first circular row comprising a plurality of substantially isosceles triangles wherein each isosceles triangle comprises two spiral ribs and a hoop rib, and wherein the spiral ribs extend between the first hoop and the second hoop, and the hoop rib comprises a length of either the first hoop or the second hoop; e. A second circular row comprising a plurality of substantially isosceles triangles wherein each isosceles triangle comprises two spiral ribs and a hoop rib, wherein the spiral ribs extend between the second hoop and the third hoop, wherein the hoop rib comprises a length of either the second hoop or the third hoop, and wherein every other isosceles triangle disposed in the second circular row shares a hoop rib with one isosceles triangle disposed in the first circular row; and f. Wherein the isosceles triangles of the first circular row and the isosceles triangles of the second circular row are substantially co-planar.