Research On The Calculation Methods Of The Length Of The Dropper Based On Finding Form Of Cable Net

The design,construction and operation maintenance of ocs is an organic whole. If one of them is not carried out well,the final pantograph catenary system can not run well. In these links, The design is a foundation, The construction is a key, If These two links completed well, The Maintenance and Service is easy. The construction also has many links, Like the measurement, matches, material cutting, Assembly and so on, And matches this link required accuracy certainly to in advance be high, Mainly includes the cantilever length calculation and dropper length calculation two computation links, Our country present is constructing the passenger transportation special line vigorously, And many lines meet the form which touches the net are the elastic chain are hanging, also the experience is few, therefore the accurate matches is also a more important link in advance. The important characteristic between simple suspension type and elastic suspension type is span and span connects through the elastic suspension cable, when computation must take the entire anchor section as the object of study, the traditional method is very difficult in the precision to satisfy the high speed guest's special request, therefore seeks the new method to solve is also very essentialThis paper first introduces several kinds of the traditional calculation method. Including uniform load method and torque method, And then introduces a kind of foreign calculating method. That is catenary method , On this basis, Pointed out the advantages and disadvantages of these methods, as well as the applicability of them. Then put forward a new calculating method focuses on the theoretical basis of the new method,the flow of solving problem for Finite element method and the basic idea of cable form-finding. Then introduces the calculation process considering the actual situation of ocs. When computation must consider all factors, like line factor, including curve up to information, outer rail superelevation information, vertical curve information and so on, but also includes the overhead contact system parameters, like the density of contact wire, messager wire, dropper, the elastic suspension cable and so on, the anchor section joint arrangement information, the anchor to moor the information and how to determine the Location of the first dropper and so on. The computed result and Simens's computed result have carried on the contrast, Finally indicated that this method is one kind of good method and worth advocating a new method.