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Method and device for obtaining PSD of vibration endurance test

An acquisition method and durability test technology, applied in vibration test, measuring device, vehicle test, etc., to achieve cost-effective results

Active Publication Date: 2018-03-06
WUXI WEIFU LIDA CATALYTIC CONVERTER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the load characteristics of traditional commercial vehicle aftertreatment products and non-road products are completely different, so it is necessary to formulate a reasonable product vibration durability test method based on the load characteristics of non-road aftertreatment products

Method used

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  • Method and device for obtaining PSD of vibration endurance test
  • Method and device for obtaining PSD of vibration endurance test
  • Method and device for obtaining PSD of vibration endurance test

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Embodiment Construction

[0045] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0046] As a first aspect of the present invention, there is provided a method for obtaining the PSD of the vibration durability test, wherein the method for obtaining the PSD of the vibration durability test is applied to non-road aftertreatment products, such as figure 1 As shown, the acquisition methods include:

[0047] S110. Obtain an initial test signal, where the initial test signal includes a vibration signal, a working condition description, and a durability index;

[0048] S120. Perform a signal check on the initial test signal to obtain a credible test signal;

[0049] S130. Perform signal restoration processing on the trusted test signal to obtain a...

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Abstract

The present invention discloses a method for obtaining a PSD (Power Spectral Density) of a vibration endurance test. The method comprises the steps of: obtaining initial test signals; performing signal checking of the initial test signals, and obtaining credible test signals; performing signal repairing processing of the credible test signals, and obtaining standard test signals; performing rain-flow statistics of the standard test signals according to a rain flow counting method, and obtaining a rain-flow statistics result; performing PSD analysis of the standard test signals, and obtaining an initial PSD curve; according to the rain-flow statistics result, performing a first iteration loop correction of the initial PSD curve, and obtaining a PSD curve after the first correction; the maximum value / the minimum value analysis of the standard test signals; and performing a second iteration loop correction of the PSD after the first correction according to a PSD evaluation criterion and damage computation, and obtaining a target PSD curve. The present invention further discloses a device for obtaining a PSD of a vibration endurance test. The method provided by the invention can obtaina target PSD curve suitable for the vibration endurance test.

Description

technical field [0001] The present invention relates to the technical field of reliability verification, in particular to a method for obtaining PSD of a vibration durability test and a device for obtaining PSD of a vibration durability test. Background technique [0002] With the tightening of national environmental protection regulations, the non-road after-treatment structure has added a catalytic converter structure, and the mass is getting bigger and bigger. The engine body is in a complex working environment with high temperature and high vibration levels, and the structural reliability of after-treatment products is becoming more and more serious. more and more important. [0003] There are still some deficiencies in the vibration durability test of aftertreatment products in the industry. In most cases, the traditional test method of commercial vehicle aftertreatment products will be used instead of verification. However, the load characteristics of traditional co...

Claims

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Application Information

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IPC IPC(8): G01M7/02G01M17/007
CPCG01M7/00G01M17/007
Inventor 徐岘杨小东李东晗
Owner WUXI WEIFU LIDA CATALYTIC CONVERTER
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