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Hydraulic vibration table exciting force trilinear logarithmic analysis method

A technology of hydraulic vibration and analysis method, which is applied in the direction of vibration test, measuring device, machine/structural component test, etc. It can solve the problems of uneconomical structural engineering, inability to ensure structural safety, lack of excitation force analysis, etc., and achieve normal use Guarantee, normal use and reliable effect

Active Publication Date: 2017-05-10
AUTOMOTIVE ENG CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past engineering design, due to the lack of basic methods of exciting force analysis, it can only be estimated by experience, which makes structural engineering often uneconomical, and the safety of the structure cannot be ensured.

Method used

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  • Hydraulic vibration table exciting force trilinear logarithmic analysis method
  • Hydraulic vibration table exciting force trilinear logarithmic analysis method
  • Hydraulic vibration table exciting force trilinear logarithmic analysis method

Examples

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Effect test

example

[0073] In the frequency range of 0.01-100Hz, the known maximum displacement U max =150mm, maximum speed V max =1.2m / s, maximum acceleration a max =10m / s 2 , and a=0.01m / s 2 , (when f = 0.01Hz). The mass of the moving part of the vibrating table is m=800kg, and the maximum exciting force is F max = 20kN. Calculate the excitation force at f = 2.5Hz.

[0074] untie:

[0075]

[0076] a 1 =2πf 1 ·V max =2π×1.273×1.2=9.598(m / s 2 )

[0077] a 2 =a 3 =A max =20(m / s 2 )

[0078]

[0079]

[0080] c 1 = lga 1 -k 1 lgf 1 = lg9.598-1.332 lg1.273 = 0.8336

[0081] c 2 = lga 2 -k 2 lgf 2 =lg20-1.000lg2.653=0.8774

[0082]

[0083] Exciting force is

[0084] F=m·a(f)=800×10 0.8774 ×2.5 1.0 =15.08(kN)max =20kN

[0085] Meet the requirements of the exciting force.

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Abstract

The invention discloses a hydraulic vibration table exciting force trilinear logarithmic analysis method. According to the structural characteristics and the working principle of the vibration test table, the Newton's law is referred to build a vibration test table exciting force trilinear logarithmic analysis method, the exciting force of the vibration test table can be analyzed conveniently and accurately, effective vibration load basis is provided for basic design of the test table, and reliable guarantee is provided for the structural engineering safety and the test facility normal use.

Description

technical field [0001] The invention relates to the technical field of vibration test benches, in particular to a method for analyzing the logarithm of the tri-fold line of the excitation force of a hydraulic vibration table. Background technique [0002] Vibration test bench is an important technical means of modern product development. Due to the relatively large excitation force of the vibration test bench, especially the maximum excitation force of the hydraulic vibration table can reach thousands of kN, it is widely used in earthquake simulation tests, road simulation test machines, and vibration environment simulation of aerospace products. The impact of test bench vibration on the environment, to ensure the safety of buildings around the test facility, engineering designers need to understand the frequency characteristics of the vibration table excitation force. In the past engineering design, due to the lack of basic methods of exciting force analysis, it can only b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 徐建万叶青杨俭
Owner AUTOMOTIVE ENG CORP
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