| 摘要 |
The invention concerns a ductile structure designed to rotate about a given axis comprising an inner ring-shaped element (3) centred on the axis, an outer ring-shaped (4) flexible and substantially inextensible element, radially arranged relatively externally to said inner element, a plurality of support elements (5) arranged between the inner element and the outer ring-shaped element, each support element (5) countering a radial compression stress with a substantially constant force, said outer element (4) having a circumferential dimension such that said support elements (5) are prestressed in radial compression, and means for stabilising the relative positions of the inner element and the outer element. The invention is characterised in that said support elements (5) tend to limit their prestress load by a relative displacement in circumferential rotation between the inner element and the outer element and said stabilising means counter any relative movement in rotation between the inner element and the outer element.
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