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Method for acquiring modal vibration of railway vehicle

A rail vehicle and acquisition method technology, which is applied in the field of rail vehicle modal vibration acquisition, can solve problems such as poor accuracy, redundant vibration modal information, and low calculation efficiency

Active Publication Date: 2021-05-07
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, in the prior art, the method for obtaining vibration expansion is directly solved by the relational expression of physical vibration, mode shape and modal vibration. The calculation efficiency is not high, and the calculated vibration mode information will be redundant. , resulting in poor precision

Method used

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  • Method for acquiring modal vibration of railway vehicle
  • Method for acquiring modal vibration of railway vehicle
  • Method for acquiring modal vibration of railway vehicle

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Embodiment

[0049] The invention relates to a method for acquiring modal vibration of a rail vehicle. The method utilizes a physical vibration response inverse line to acquire modal vibrations of various orders of the vehicle body, such as figure 1 As shown, the specific steps of the method include the following:

[0050] Step 1. Determine the truncated mode order of the target structure according to the research requirements. The truncation order can be a certain mode or several modes. Specific steps include:

[0051] 1.1) To clarify the research requirements, that is, to clarify the frequency range of the research, and to determine the elastic mode order of the target structure within this range. Specifically: for the problem of rolling out the structural vibration of the rail vehicle body, due to the lightweight technology used in the car body, the problem of elastic modal vibration has gradually become prominent. In order to ensure the ride comfort of rail vehicles, the main low-or...

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Abstract

The invention relates to a method for acquiring modal vibration of a railway vehicle. The method comprises the following steps: 1) determining a truncated modal order of a target structure according to a railway vehicle structure of which modal vibration is to be acquired; 2) arranging a sensor at a proper position of the target structure, and acquiring physical vibration response of the target structure; and 3) based on a modal superposition theory, carrying out decoupling operation on the physical vibration response, and extracting the modal vibration of the structure. Compared with the prior art, the method has the advantages that the error between the fitting value and the observation value can be reduced, and the precision is high.

Description

technical field [0001] The invention relates to the technical field of rail transportation, in particular to a method for acquiring modal vibration of a rail vehicle. Background technique [0002] In the field of rail transit technology, improving the running speed and riding comfort of rail vehicles has always been a research hotspot of various scholars. In order to ensure the safety of the high-speed operation of the EMU train and its operation, a large number of light and high-strength materials are used. Due to the increasingly prominent impact of the adoption of vehicle body lightweight technology on its elastic mode vibration, this will greatly reduce the comfort of passengers. [0003] In order to take into account both high-speed rail vehicles and ride comfort, it is necessary to take effective control measures for the modal vibration of the car body. To effectively control the vibration of the vehicle body, it is first necessary to accurately grasp the characteris...

Claims

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Application Information

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IPC IPC(8): G01M17/08
CPCG01M17/08
Inventor 宫岛赵阔周劲松张俊泽周锦柯刘广宇王泽根
Owner TONGJI UNIV