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An umbilical cable serves as a crucial link between the water surface and subsea units in offshore engineering. In this paper, a model test method for the lateral buckling of an umbilical cable armor layer under bending and compression was proposed, and the model was constrained by a sheath to induce lateral buckling. Model tests were carried out under the conditions of straight and bending radii of 2 m, 1.7 m, and 1.4 m. The accuracy of the proposed model test method was verified by the comparison between the theoretical values and experimental results in previous literature, and comparing with the numerical simulation results of this paper. The experimental study revealed that the critical displacement and critical buckling load for lateral buckling of the umbilical cable armor layer increased as the bending radius decreased, and the location of lateral buckling moved toward the fixed end with decreasing bending radius. For the umbilical cable in a bent and compressed state, lateral buckling of the armor wires with the initial winding position on the concave surface of the bend was more pronounced. The lateral buckling model test method proposed in this paper can be used to study the failure mechanism and mode of the umbilical cable armor layer under lateral buckling and to validate numerical simulation analysis.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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