V.Yu. Volokhovsky, Cand. Sci. (Eng.), Lead Specialist A.N. Vorontsov, Cand. Sci. (Eng.), Lead Specialist A.V. Zhirnov, Lead Specialist A.R. Rudyak, Engineer INTRON PLUS, Ltd., Moscow, Russia
Monitoring of the technical state of steel ropes of guy wires is important for ensuring safety requirements of the antenna mast structures (AMS) operating. Practical application of magnetic-flaw detection method for diagnostics of steel ropes of guy wires of AMS is considered in the article. Brief description of basic physics of used testing method is given. The method is based on the registration of fluctuations of the magnetic flaw distributions by the Hall effect sensors. Magnetic flaw is caused by the loss of the rope cross section of metal area during operation due to corrosion and the appearance of local defects such as wire breaks from the acting static and dynamic loads. The description of structures and components of the used diagnostic equipment — measuring instrument of the steel ropes wear (flaw detector) INTROS — as well as technology of performing the diagnostics of AMS guy wires are given.
Efficiency of the applied technology of monitoring of technical state of steel ropes of guy wires is illustrated by the results of diagnostics of two objects in the «Orenburg ORTPTs», the branch of FSUE Russian Television and Radio Broadcasting Network (RTRS). The life-time of the masts guy wire ropes in Yasny and Kuvandyk exceeded 40 years, therefore a problem of the operational lifetime extension longer than the standard service life was urgent. According to the results of diagnostics, some of these ropes were considered as suitable for further operation. On the mast in Yasny, the rejected operational defects in two ropes of the first and third levels of northeastern guy wires were detected. The defects were diagnosed as broken wires and the rope core. These ropes are considered as unusable for further operation and subjected to replacement.
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