In this study, a new type of electrical-connection-fitting, clevis-clevis component made of high-strength steel is developed to reduce weight, and a new hot-stamping process for multilayered sheets is proposed to manufacture the component efficiently.
Traditional electric transmission line fittings, which are always manufactured from thick metal slabs, possess the disadvantage of heavy weight. When the form conductor tension is loaded on the tension insulator string, it can be found that the most dangerous and secondary dangerous fittings in the tension insulator string are found, and the stress analysis is carried out on the key connecting fittings, which provides a reference for the design and optimization of electric power fitting. Under any ice-shedding condition, the maximum dynamic tension of the conductor of multi-span transmission line will be close to or greater than the static tension after conductor icing. The results show that the maximum dynamic tension of the conductor of isolated span transmission line is greater than the static tension of conductor icing only when the length of ice-shedding section is small.
Then, conductors with uniform thickness of ice coating and ice shedding process are simulated by changing density method. In order to obtain the actual load of electric power fittings and study the stress of each electric power fitting under the actual load, a transmission line model of catenary-shaped and an integral model of tension insulator string are established in this paper. In fact, the natural period of such cables is of the order (hi g)/2 and, in deep water (h ∼ 1000 m.), the natural frequency is in the range of the usual ocean frequencies.Electric power fittings are the link between conductors and transmission towers, and it is essential to improve their ability to withstand damage. In one hand, when this angle is relatively small, one has a typical configuration for a "mooring line", since an appreciable horizontal force at the top is desirable in this case in the other hand, when this angle is close to rr/2, one has a configuration to be named here "umbilical line", that embraces not only the family of flexible risers, with relatively small diameter and bending stiffness, but also eletric-hydraulic cables used to command certain operations at the sea bottom. If one considers, in a catenary configuration, the segment that joins the "top" to the "touchdown points" of the suspended line, one can divide the cables into two distinct classes, accordingly to the angle between this segment and the assumed horizontal plane of the ocean floor. Ocean systems, designed for oil production in deep water, are linked to the sea bottom by different types of submerged cables.
0 kommentar(er)
