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Synthetic evaluation method of high-speed wheel/rail profile matching state

A comprehensive evaluation and surface matching technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to give objective evaluations, and achieve highly operable results

Active Publication Date: 2019-01-04
RD CENT CHINA ACADEMY OF RAILWAY SCI
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AI Technical Summary

Problems solved by technology

When using sporadic evaluation indicators to evaluate wheel-rail profile matching, it is inevitable to lose sight of one another, and it is impossible to give a relatively objective evaluation

Method used

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  • Synthetic evaluation method of high-speed wheel/rail profile matching state
  • Synthetic evaluation method of high-speed wheel/rail profile matching state
  • Synthetic evaluation method of high-speed wheel/rail profile matching state

Examples

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example

[0144] Example: Evaluate the advantages and disadvantages of CRH380B when the wheel profile S1002CN is matched with the 60D and 60N-M rail profiles when the T70 anti-snaking shock absorber is assembled. The matching of surface S1002CN and 60N-M rail profile is recorded as matching 2.

[0145] Wheel profile S1002CN, rail profile 60D and 60N-M such as figure 2 and image 3 shown.

[0146] Step 1: Construct the evaluation index set for the evaluation of high-speed wheel-rail profile matching {derailment coefficient, wheel load reduction rate, wheel axle lateral force, frame lateral acceleration, critical speed, comfort, stability index, wear index on a straight line unit distance , the wear index on the curve unit distance, the equivalent taper, the maximum wheel-rail contact stress}.

[0147] Step 2: Build as figure 1 The hierarchical decomposition diagram of the high-speed wheel-rail profile matching evaluation index shown.

[0148] Step 3: Establish the scoring principle...

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Abstract

The invention discloses a comprehensive evaluation method for high-speed wheel / rail profile matching state, which comprises the following steps: 1, constructing an evaluation index set for high-speedwheel / rail profile matching evaluation; 2, according to the evaluation index set, the evaluation index system of high-speed wheel / rail profile matching being constructed; 3, establishing the scoring principle of wheel / rail profile matching evaluation, and design, distributing and collecting the questionnaire of wheel / rail profile matching evaluation expert; 4, constructing a judgment matrix by statistical data; 5, modifying the judgment matrix to determine the weight of the single-level evaluation index; 6, determining the weight of the evaluation index according to the principle of top-down;7, calculating the calculated value of the evaluation index according to the relevant simulation calculation working conditions; 8, normalizing the calculated value of the evaluation index; 9, calculating the comprehensive evaluation value of wheel / rail profile. The invention provides a scoring scheme of the same-level evaluation index, which can realize the comparison of the advantages and disadvantages of two groups of wheel / rail profile matching.

Description

technical field [0001] The invention belongs to the technical field of railway vehicles, and in particular relates to a comprehensive evaluation method for the matching state of high-speed wheel-rail profiles. Background technique [0002] The academic circles and the industry have not reached a consensus on how to comprehensively evaluate the quality of wheel-rail profile matching. The specific manifestations are: which evaluation indicators are used to sensitively describe the quality of the wheel-rail matching state; how to synthesize multiple evaluation indicators to form a final evaluation. Looking at the existing wheel-rail evaluation methods, individual index sets are mainly used to evaluate the individual performance of the wheel-rail surface matching, and no comprehensive evaluation is performed. For example, the lateral acceleration of the frame and the equivalent taper are used to evaluate the stability of the vehicle running. For example, the vehicle body vibrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02T90/00
Inventor 成棣胡晓依刘丰收侯茂锐俞喆孙丽霞
Owner RD CENT CHINA ACADEMY OF RAILWAY SCI