Umbilical cables are widely used in various fields, including underwater production, inspection, surveillance, search and identification, installation and retrieval, cleanup, marine scientific research, global positioning, search and rescue of stricken vessels, rescue of trapped submarines, and relay communication. In different usage environments, factors such as bending, tension winding, wear, and corrosion need to be considered.<\/p>\n
1) Bending. During operation, umbilical cables often bend at locations such as pulleys, fairleads, and winch drums.<\/p>\n
2) Tension winding. During the deployment of umbilical cables, the internal tension constantly changes, and the geometric relationships between various components change with the change in deployment amplitude, resulting in winding motion and causing internal friction.<\/p>\n
3) Wear and tear. The winding motion of the umbilical cable can cause two forms of wear and tear: one is the wear and tear between internal components of the umbilical cable, and the other is the wear and tear between the umbilical cable and the deployment device. Wear and tear can lead to the continuous deterioration of a certain point on the umbilical cable until it fails. The wear rate is affected by various operational factors, such as the deployment rate, tension, pulley arrangement, and the bending radius of the umbilical cable. Improper selection or installation of the deployment device can accelerate the wear and tear on the outer surface of the umbilical cable.<\/p>\n
4) Corrosion. Seawater corrosion primarily affects metals, especially steel wires. For instance, the commonly seen double-layer armored umbilical cables will gradually undergo electrolytic dissolution in seawater, leading to erosion of the inner steel wires by seawater.<\/p>\n
5) Forming loops or kinks. When the umbilical cable is subjected to tension and forms a loop, it is prone to kinking as the radius continuously shrinks, which can lead to permanent deformation. 6) Flattening. When the umbilical cable is affected by wind and waves, if the stressed cable loop presses against another cable loop, or if the lower layer of the umbilical cable is subjected to excessive winding tension, it may be squeezed on the winch drum. Highly concentrated pressure may cause permanent deformation of the metal load-bearing units and other components.<\/p>\n
Therefore, the dimensions, mass, operating depth, power, subsystems, and loads of underwater equipment all directly affect the structural design of the umbilical cable.<\/p>","protected":false},"excerpt":{"rendered":"
Factors limiting umbilical cables Umbilical cables are widely used in various fields, including underwater production, inspection, surveillance, search and identification, installation and retrieval, cleanup, marine scientific research, global positioning, search and rescue of stricken vessels, rescue of trapped submarines, and relay communication. In different usage environments, factors such as bending, tension winding, wear, and corrosion […]<\/p>\n","protected":false},"author":1,"featured_media":2092,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2091","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\n