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Ballastless track designing, checking and calculating system based on space detail solid model

A ballastless track and solid model technology, applied in calculation, special data processing applications, instruments, etc., can solve the problems that the calculation accuracy of internal force cannot be guaranteed, and the design requirements cannot be met.

Inactive Publication Date: 2014-01-15
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The spatial model is established in the inspection and calculation without considering the influence of internal reinforcement. Although the internal force and deformation of the track slab and other structural layers can be obtained, due to the roughness of the track structure model, the calculation accuracy of the internal force cannot be guaranteed, and the front and rear calculation models are not The unified model cannot meet the requirements of the design

Method used

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  • Ballastless track designing, checking and calculating system based on space detail solid model
  • Ballastless track designing, checking and calculating system based on space detail solid model
  • Ballastless track designing, checking and calculating system based on space detail solid model

Examples

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Embodiment 1

[0084] This embodiment is the design and calculation of the ballastless track of the station line, the design method of the ballastless track of the station line is as follows figure 2 shown.

[0085] In the design model, the solid model of the rail is established, and the fastener is simulated by two three-way springs in the Cartesian coordinate system, such as image 3 shown. Both the ballast bed slab and the supporting layer are considered as solid units, and the subgrade springs are evenly distributed under the supporting layer. The spring stiffness is 76MPa / m according to the "Code for Design of High-Speed ​​Railways (Trial)" and the theoretical results of ballastless track re-innovation. The subgrade spring model is as follows: Figure 4 As shown, the overall model of the track structure is as follows Figure 5 shown.

[0086] The loads applied in the design and calculation include temperature loads, vehicle loads, self-weight loads, concrete shrinkage deformation, fou...

Embodiment 2

[0102] In this embodiment, the static and dynamic design and calculation are carried out for the prestressed ladder track structure. Ladder-type track is a kind of frame-type ballastless track, which is mainly used in the vibration reduction section of urban rail transit. The layout of the ladder track is as follows Figure 13 shown.

[0103] The ladder-type track longitudinal beam is a prefabricated prestressed reinforced concrete structure with a length of 6.15m, a width of 0.46m, and a thickness of 0.185m. The material is C60 concrete. The ladder-type track steel pipe is used to connect two longitudinal beams to make it a whole. The length of the steel pipe is 1.85m, and the cross-sectional size is 0.125×0.075m. Vertical, horizontal and vertical elastic buffers and anti-vibration materials are arranged around the ladder track to transmit the vibration of the track structure to the surroundings. The finite element model obtained according to the above design parameters is...

Embodiment 3

[0125] This embodiment mainly introduces the application of this introduction method in the detailed checking model. Taking the application and inspection of CRTSⅢ slab ballastless track as an example, the application of this method in detailed inspection is introduced. Among them, the following two calculations are mainly carried out: 1) Analysis of the influence of different reinforcement methods on the base plate on the force of the base plate; 2) The strength check of the door-shaped steel bars connected to the bottom of the track slab and the self-compacting concrete.

[0126] CRTSⅢ slab ballastless track consists of rails, fasteners, track plates, door steel bars, self-compacting concrete, isolation layer, rubber cushion, base plate, etc. from top to bottom. The rail is CHN60 rail, the fastener is WJ-8 type fastener system, the distance between fasteners is 0.63m, the longitudinal force provided by each group of fasteners is 9.0kN, the transverse static stiffness is 50kN...

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Abstract

The invention relates to a ballastless track designing, checking and calculating system based on a space detail solid model. A method includes the following steps that a finite element model of a steel rail, a ballastless track system and a lower portion foundation is built; according to the model, the bending moment and the internal force of each structural layer of the track system under the action of loads are calculated; according to the bending moment and the internal force obtained through calculation, a detail checking and calculating model of a solid steel bar unit, a ballastless track system solid unit and the lower portion foundation is built; according to the checking and calculating model, the internal force, the stress and deformation conditions of the steel rail, the ballastless track system and the lower portion foundation under different loading conditions are checked and calculated, and stress of detail connecting steel bars is checked and calculated. The designed models can extract the bending moment and the axial force, under the action of the loads, of the track system, and a power evaluation model considers a detailed structure mode of a vehicle and the lower portion, uses self-compiled programs for completing wheeltrack contact and achieves extraction of power indexes of the vehicle in high-speed running.

Description

technical field [0001] The invention belongs to the technical field of railway engineering application calculation and design, and in particular relates to a high-speed railway ballastless track design checking system combining static and dynamic forces and combining whole and detail. Background technique [0002] The ballastless track structure has the characteristics of high smoothness, high stability, high durability and high reliability, and is accepted by high-speed railways all over the world. The ballastless track structure is also widely used in high-speed railways in my country. In the design process of ballastless track, it is necessary to carry out detailed internal force checking and reinforcement design, and detailed checking and calculation of detailed components such as shear pins, door ribs, etc. are required. Many simplifications have been made. For example, in the innovative theory of ballastless track, in order to calculate the internal force of the track...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 高亮赵磊曲村蔡小培肖宏辛涛侯博文胡华锋乔神路王璞
Owner BEIJING JIAOTONG UNIV
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