| As the artery of ship power system, the cable used on ship plays an important role of providing power and transferring control signals for electrical equipments. Especially for some ships with high automation level, the status of the cable directly affects the safety of the ship. For long time navigation at sea, the cable works under the condition of high temperature, high humidity, vibration and strike, air with oil and salt mist, which will accelerate the cable aging process. If the cable lost function and didn't be replaced on time, it may cause fire, explosion or some other severe accidents. If the cable is replaced long before the deadline of its lifetime, it can cause a big waste. Therefore, it is important to conduct the study of the lifetime analysis of cable insulation.Firstly, the common malfunction and the structure of CXF type shipboard cable were introduced. Secondly, a test-bed for accelerated aging experiment of cable insulation layer was developed. The test-bed can simulate the shipboard environment. Then two groups of aging experiment (with humidity or without humidity) were conducted. After that elongation at break of the aged cable insulation layer samples were measured. In addition, based on the related calculation methods in GB/T 11026.3-2006, the experiment data was analyzed through Matlab, and the continuous working lifetime of CXF type cable under the working temperature between 65℃and 95℃was obtained. Finally, the CXF type cable insulation layer aging curves in the temperature range of 65℃to 95℃was plotted and their corresponding mathematical models were proposed on the basis of Arrhenius theory.An effective method and model for the residual life assessment of shipboard cable were proposed. This mathematic model can predict the residual life of CXF type shipboard cable effectively. This is important for both the ship safety and avoidance of huge waste of human and property resources.
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