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A sandy soil vibration propagation performance test box and test method

A technology of propagation performance and test method, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, which can solve the problems such as the inability to apply vibration propagation research, and achieve the effect of facilitating excitation and vibration propagation.

Inactive Publication Date: 2016-11-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0007] The purpose of the present invention is to provide a sandy soil vibration transmission performance test box and testing method, to solve the problem that the vibration transmission performance test in the prior art cannot be applied to the vibration transmission research similar to the sandy soil particle powder solid medium

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  • A sandy soil vibration propagation performance test box and test method
  • A sandy soil vibration propagation performance test box and test method
  • A sandy soil vibration propagation performance test box and test method

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Embodiment Construction

[0050] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0051] refer to Figure 1 to Figure 7As shown, a sandy soil vibration propagation performance test box of the present invention is composed of a rectangular box, and the material of the rectangular box is metal material. The first-order natural frequency of the rectangular box is 1859.4Hz, and the second-order natural frequency is 1859.4Hz. is 2517.3Hz, the third-order natural frequency is 2517.4Hz, and the formation of the rectangular box is the first three-order bending deformation.

[0052] Use ANSYS to carry out modal analysis on the rectangular box body, and through modal analysis, parameters such as natural frequency and mode shape can be determined.

[0053] The outer dimensions of t...

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Abstract

The invention discloses a sandy soil vibration transmission performance test box and a testing method. The test box is composed of a rectangular box body, and four sandy soil vibration transmission performance test boxes are buried in the sandy soil, and the hammering method is used to directly excite and bury the test box. One of the sand vibration transmission performance test boxes in the sandy soil generates pulse excitation signals; the excitation signals collected by the sensors on the other sand vibration transmission performance test boxes are processed, and the test results are obtained. The invention uses the hammering method to carry out the vibration test, and uses the metal hollow rectangular box to collect the vibration signal to determine the vibration propagation characteristics of the sandy soil. Generation and testing, but also conducive to excitation and vibration transmission.

Description

technical field [0001] The invention relates to a testing device and a testing method for testing the vibration transmission performance of a loose solid medium, in particular to a testing box and a testing method suitable for testing the vibration transmission performance of granular powdery discontinuous solids such as sandy soil. Background technique [0002] As the medium of vibration communication, sandy soil is the intermediary for animals to transmit information and capture prey through vibration. In order to study the signal vibration transmission in sandy soil, it is necessary to carry out corresponding vibration test experiments. [0003] Document 1 (Sending Soil Vibration Signals to Lekking Prairie Mole Cricket Males) discusses that grassland mole crickets communicate through the transmission of soil vibration signals. The test method for vibration transmission of sound in soil described therein is measured with a geophone. [0004] Document 2 (Vibration Sensitiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04
Inventor 岳林骆银河陈飞翔
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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