Construction method of dropper in full-compensatory elastic chain type hanger in contact network of rapid transit railway
A technology for high-speed railways and construction methods, which is applied to overhead lines and other directions, can solve the problems of not considering the internal force transfer relationship of the anchor section and the low accuracy of pre-allocated data, and achieve the effects of high accuracy, improved accuracy and guaranteed installation quality.
Inactive Publication Date: 2012-02-22
中铁建电气化局集团南方工程有限公司
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[0009] The purpose of the present invention is to overcome the shortcomings and problems in the prior art that do not consider the transfer relationship of the internal force of the anchor section and the accuracy of the pre-configured data is not high, and provide a form-finding system based on cable nets that has considered the internal force of the anchor section. The construction method of the hanging string in the full compensation elastic chain type suspension of the high-speed railway catenary with high accuracy of transfer relationship and pre-configured data
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[0052] see figure 2 – Figure 4 , figure 2 It is a schematic diagram of the bullet chain model applied to a span of the present invention, wherein, (x i ,y i ) is the coordinates of each node, G Ji is the concentrated load of each node, i=0, 1, 2...11; image 3 yes figure 2 The force analysis diagram of the i-th cable element in , Figure 4 yes figure 2 The force analysis diagram of the i+1th cable unit in .
[0053] see figure 2 , establish the coordinate system as shown in the figure. For the convenience of calculation, take the position of the guide height (assuming the guide height is 5300mm) as the abscissa, and assume that the abscissa distance from the coordinate origin to node 0 is 0, that is, node 0 is ( 0,y 0 ), assuming that the height of the catenary cable at node 0 measured on site is 6.908 meters, and the guide height is 5300mm (refer to the guide height of a passenger train), then the structural height here is 6.909m–5.3m=1.608m, so the node The ...
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The invention relates to a construction method of a dropper in a full-compensatory elastic chain type hanger in a contact network of a rapid transit railway. The construction method comprises the following steps: performing mathematical modeling by taking a contact hanger within any span of an anchor section as an object, wherein each node on a strength-bearing cable corresponds to the position of one dropper, a cable unit is formed between every two nodes, the coordinate of the i-th node is (xi, yi), and the concentrated load of the i-th node is GJi, i=0,1,2...; establishing an entire stiffness matrix of the cable units according to a brand new expression of the cable unit formed between the i-th node and the (i+1)th node and a longitudinal force balancing equation of the i-th node; solving the simultaneous equations, thereby acquiring a vertical coordinate yi of the i-th node; acquiring a length of the dropper corresponding to the i-th node according to a dropper length equation: Ci=yi-Hi; and finally correcting, prefabricating the dropper, determining the mounting position of the dropper and performing construction. The construction method provided by the invention has the advantages that a rounding error generated in the prior art is efficiently avoided and the accuracy of calculated data is higher.
Description
technical field [0001] The invention relates to a construction method for catenary suspension, in particular to a construction method for hanging strings in full-compensation elastic chain type suspension of high-speed railway catenary, and is specifically applicable to full-compensation elastic chain type suspension of 350km / h high-speed railway catenary Construction of hanging strings. Background technique [0002] At present, the elastic chain type suspension is a notable feature in the construction of my country's high-speed passenger-dedicated railway catenary, and it is also a major direction in the design of my country's high-speed passenger-dedicated railway. However, due to the extremely high precision requirements of the elastic chain type suspension construction, the elastic chain type suspension suspension string calculation technology with independent property rights in my country can only be partially applied to the construction of 250km / h and below lines, and ...
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IPC IPC(8): B60M1/28
Inventor 彭龙虎谢文艺喻文彬
Owner 中铁建电气化局集团南方工程有限公司
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