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Pantograph frame fatigue life prediction method

A fatigue life prediction and pantograph technology, which is applied in prediction, electrical digital data processing, complex mathematical operations, etc., can solve problems such as large errors, inaccurate prediction of the service life of the pantograph frame, and influence on the normal operation of rail vehicles.

Pending Publication Date: 2022-03-01
中机寰宇认证检验股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above method is inaccurate in prediction and has a large error
Based on this, not only the service life of the pantograph frame cannot be accurately predicted, but also the normal operation of the rail vehicle will be affected

Method used

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  • Pantograph frame fatigue life prediction method
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Embodiment Construction

[0063] In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and their sequence is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not necessarily limit the difference.

[0064] It should be noted that, in the present invention, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "ex...

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Abstract

The invention provides a pantograph frame fatigue life prediction method, relates to the technical field of life prediction, and aims to solve the technical problems of inaccurate service life prediction and large error of a pantograph frame in the prior art. The method for predicting the fatigue life of the pantograph frame comprises the following steps: establishing a structural stress model of the pantograph frame; obtaining a dangerous point stress time history according to the structural stress model; obtaining the dangerous point equivalent stress amplitude and the cycle index of the dangerous point equivalent stress amplitude according to the dangerous point stress time history; obtaining a dangerous point equivalent stress probability density function of the pantograph frame according to the dangerous point equivalent stress amplitude and the cycle index of the dangerous point equivalent stress amplitude; and predicting the fatigue life of the pantograph frame according to the dangerous point equivalent stress probability density function and the material SN curve of the pantograph frame.

Description

technical field [0001] The invention relates to the technical field of life prediction, in particular to a method for predicting the fatigue life of a pantograph frame. Background technique [0002] The pantograph is installed on rail vehicles such as electric locomotives or electric vehicles. The pantograph is an electrical device that obtains current from one or more contact wires or receiving rails. The pantograph is generally composed of three parts: the bow head, the frame and the transmission device. The bow head is installed on the frame, and then the frame is fixed on the roof through the insulator. The transmission device is connected with the frame to control the lifting and lowering of the pantograph. bow process. [0003] Pantograph is an important part of rail vehicles, and its service life has a great impact on the normal operation of rail vehicles. In the prior art, the service life of the pantograph frame is usually predicted and analyzed by using the progr...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06Q10/04G06F17/18G06F119/04G06F119/14
CPCG06F30/23G06Q10/04G06F17/18G06F2119/04G06F2119/14
Inventor 杜敏杰刘继永王玉鑫
Owner 中机寰宇认证检验股份有限公司
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