Heavy haul railway turnout static and dynamic design model construction method

A technology for designing models and constructing methods, which is applied in calculation, instrumentation, electrical digital data processing, etc., and can solve problems such as design and maintenance of heavy-duty railway turnouts that are difficult to achieve

Inactive Publication Date: 2014-06-11
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There is no method in the prior art that can effectively design and check heavy-duty railway turnouts, and it ...

Method used

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  • Heavy haul railway turnout static and dynamic design model construction method
  • Heavy haul railway turnout static and dynamic design model construction method
  • Heavy haul railway turnout static and dynamic design model construction method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0080] In this embodiment, the No. 12 turnout of the heavy-duty railway alloy steel assembled frog is taken as an example, and the weak parts are analyzed and calculated. The maximum operating axle load of the line is 30t, and the corresponding static wheel load is 150kN. According to the "Railway Track Design Code", the dynamic load coefficient is 1.4 when the vehicle speed is 100km / h. Considering the most unfavorable situation, 2 times the static wheel load is selected as the quasi-static load, and the vertical force of 300kN and the lateral force of 85kN are used as the ultimate strength load. The calculation conditions are shown in Table 1.

[0081] Table 1 Ultimate Load Cases

[0082]

[0083] Note: The vertical force is based on the 30t axle load, taking into account 2 times the dynamic load factor.

[0084]The stress deformation analysis results at the top width of the core rail at 20 mm are as follows: Figure 10 to Figure 12 shown.

[0085] Taking the load appl...

Embodiment 2

[0095] Using the No. 12 assembled frog turnout on the heavy-haul railway, the dynamic characteristics of the system under different crossing modes and different speeds under the condition of axle load 30t are calculated. The extracted calculation indicators include: derailment coefficient, wheel load reduction rate, wheel Rail lateral force, wheel-rail vertical force, rail vertical displacement and vibration acceleration.

[0096] The vehicle speed is 70km / h, 90km / h, 100km / h, 110km / h, and the calculation results are as follows when crossing straight ahead:

[0097] Table 2 Comparison of calculation results of straight crossings under different speed conditions

[0098]

[0099] It can be seen from the calculation results that all indicators increase to varying degrees with the increase of driving speed. The specific situation is as follows: Figure 23 to Figure 30 shown.

[0100] For the safety index: with the increase of driving speed, when the heavy-duty truck goes stra...

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Abstract

The invention discloses a heavy haul railway turnout static and dynamic design model construction method. The heavy haul railway turnout static and dynamic design model construction method is characterized in that the method comprises the steps of performing quasi-static analysis on a heavy haul railway turnout based on a finite-element theory, and simulating rail, rail fastening, sleeper, ballast and limiter structures and filler structures to construct a heavy haul railway seamless space coupling entity analysis model; constructing a dynamic analysis model to perform dynamic simulation calculation on car-heavy haul turnout coupling, wherein the dynamic analysis model comprises a freight train model, a heavy haul railway turnout model and a wheel-rail contact model. By adopting the technical scheme, the constructed heavy haul railway seamless space coupling entity analysis model and the constructed dynamic analysis model can provide higher-simulation-degree models for heavy haul railway turnout design and analysis; by using the models constructed by adopting the scheme provided by the invention, heavy haul railway turnouts which can fully meet use requirements can be designed.

Description

technical field [0001] The invention relates to the field of railway engineering design, in particular to a method for constructing a static and dynamic design model of a heavy-duty railway turnout. Background technique [0002] Large axis, high density, and large volume are the "three major characteristics" of my country's heavy-haul railway transportation. The turnout structure itself is one of the weak links in the track system. Under such extremely severe transportation conditions, different parts of the heavy-duty turnout (including the basic rail, point rail, fixed frog wing rail and core rail, movable center rail, etc.) The wear and damage (plumbing, side grinding, crushing, falling blocks, etc.) of frog wing rails, core rails, rail joints, etc.) is far greater than that of ordinary line switches. For example, the movable center track switch used by Daqin Railway is expected to have a designed service life of 500-800Mt with a total weight of 500-800Mt, but in actual ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 常晓东韩治平高亮肖宏蔡小培
Owner CHINA SHENHUA ENERGY CO LTD
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