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Method and device for measuring air resistance of train

An air resistance and train technology, applied in the field of rail transit, can solve problems such as gaps, and achieve the effect of important engineering significance

Active Publication Date: 2012-08-08
LOCOMOTIVE & CAR RES INST OF CHINA ACAD OF RAILWAY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that there is a gap between the wind tunnel test and the actual situation, and more importantly, the air resistance of the train is closely coupled with other resistances of the train in the running resistance test of the real vehicle. Effective separation of air resistance in running resistance tests

Method used

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  • Method and device for measuring air resistance of train
  • Method and device for measuring air resistance of train
  • Method and device for measuring air resistance of train

Examples

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Effect test

no. 1 example

[0032] The train air resistance measurement method in this embodiment is based on the characteristics that the train air resistance is basically irrelevant to the train mass in the total train resistance and other resistances are proportional to the train mass. Joint analysis of drag, measuring train air resistance, such as figure 1 The method shown includes the following steps:

[0033] a. Under the train load state I, carry out the train coasting resistance test, and obtain the synchronous time, speed and mileage data;

[0034]The train coasting resistance test under a certain load state needs to be carried out according to the corresponding specifications, and only the synchronous time and speed can be recorded. Considering the needs of measurement accuracy, measurement correction and measurement algorithm, the synchronous measurement time, speed, and mileage are optimized.

[0035] b. Obtain the total mass of the train under load state I and the total additional mass of t...

no. 2 example

[0074] The train air resistance measuring device in this embodiment, such as image 3 , including load state control module, mass module, unit equivalent mass resistance module, total resistance module, air and other resistance modules, where:

[0075] The load state control module is used to control the load state of the train in the train air resistance test;

[0076] The coasting resistance test module is used to perform a coasting resistance test under a certain load state of the train to obtain synchronized time, speed, and mileage data;

[0077] The mass module is used to obtain the train mass, the rotating additional mass and the train equivalent mass under a certain load state of the train;

[0078] The unit equivalent mass resistance module is used to obtain the change curve of the unit equivalent mass resistance of the train with speed under each load state;

[0079] The total resistance module is used to obtain the change curve of the total resistance of the train w...

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Abstract

The invention discloses a method and device for measuring air resistance of a train. According to the characteristic that the air resistance of the train is substantially unrelated to the train mass and other resistances are in direct proportion to the train mass in the total resistance of the train, the air resistance of the train and other resistances of the train are decoupled from each other through train inertia measurement and total resistance conjoint analysis under different load conditions; therefore, the measurement problem of the air resistance of the train is solved; effective means are provided for completion of operation resistance formulas of middle and high speed passenger trains, evaluation of energy conservation design of the train, high speed train power configuration, train aerodynamics researches and the like; and important engineering significances are obtained.

Description

technical field [0001] The invention relates to the technical field of rail transit, and relates to the measurement of train running resistance, in particular to a method for measuring train air resistance and a device using the method. Background technique [0002] The running resistance of the train is closely related to its power and economy. It is the basic technical parameter of the train. The running resistance test is also an important item in the type test of the locomotive and vehicle. The systematic test results - both locomotives and vehicles of various types The resistance calculation formula is given in the "Train Traction Calculation Regulations" of my country's continuously revised railway basic technical specifications, and is used for the compilation of operation diagrams, traction power configuration, and control optimization. [0003] Running resistance includes two categories: basic resistance and additional resistance. The basic resistance reflects the ba...

Claims

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Application Information

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IPC IPC(8): G01M9/06
Inventor 康熊曾宇清张波扈海军于卫东
Owner LOCOMOTIVE & CAR RES INST OF CHINA ACAD OF RAILWAY SCI
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