Plate-type ballastless track structure evaluation method based on CA mortar damage

A slab ballastless track and mortar technology, which is applied in the fields of instruments, calculations, electrical digital data processing, etc., can solve the problems of lack of on-site measurement and verification, CA mortar damage, etc.

Inactive Publication Date: 2014-03-26
SOUTHWEST JIAOTONG UNIV +1
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  • Description
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Problems solved by technology

The existing dynamic calculation model has not yet established a reasonable CA mortar damage constitutive model, and lacks field measurement verification

Method used

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  • Plate-type ballastless track structure evaluation method based on CA mortar damage
  • Plate-type ballastless track structure evaluation method based on CA mortar damage
  • Plate-type ballastless track structure evaluation method based on CA mortar damage

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Embodiment Construction

[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0048] refer to figure 1 , 2 , figure 1 The flow chart of the evaluation method for the high-speed railway slab ballastless track structure based on CA mortar damage provided by the embodiment of the present invention is described in detail as follows:

[0049] In step S101, the characteristics and mechanism of CA mortar damage are analyzed according to field investigation, the form and cause of mortar damage are clarified, and a preliminary constitutive model of CA mortar damage is established.

[0050] In step S102, according to the preliminary damage constitutive model of CA mortar, using fin...

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Abstract

The invention belongs to the field of railway engineering and provides a high-speed railway plate-type ballastless track structure evaluation method based on CA mortar damage. On the basis of the theories of the comprehensive track structural mechanics, the wheeltrack system dynamics and the finite element, CA mortar damage behavior is simulated accurately through reasonable mechanical simplification by means of large finite element software such as ANSYS and ANSYS/LSDYNA, and different levels of standards of corresponding CA mortar damage maintenance and repair are generated according to the simulation result. With the method, deformation and stress of all components such as a plate-type ballastless track system steel rail, a track plate, a mortar filling layer and the like and parameters such as vibration accelerations of all the components of a vehicle and the track system can be obtained, and thus influences of the CA mortar damage to the stress on the track structure and driving safety and comfort can be effectively evaluated, and the method has important practical significance in maintenance and repair management of plate-type ballastless tracks.

Description

technical field [0001] The invention belongs to the technical field of railway engineering, and in particular relates to a high-speed railway slab ballastless track structure evaluation method based on CA mortar damage. Background technique [0002] my country has a vast territory and complex and diverse environmental conditions. Ballastless track is the basis of traffic and has been exposed to complex atmospheric environments. It is difficult to avoid various diseases due to the long-term effects of train loads, environmental conditions and other factors. [0003] The unit slab track is an assembled structure. Once the vertical layered structure is unstable, it will cause damage to the weakest CA (Cement Asphalt Mortar, CAM) mortar layer and may cause damage to the track slab, especially when the CA mortar is damaged to pieces. When the block is cracked, the bottom of the track slab will be voided, resulting in a local sudden change in the track stiffness, deteriorating the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 刘学毅任娟娟杨荣山颜华林红松赵坪锐刘克飞李培刚张雷蔡文峰
Owner SOUTHWEST JIAOTONG UNIV
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