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Device and method capable of measuring acceleration difference value at different positions of centrifugal machine hanging basket

A centrifuge, acceleration technology, applied in the field of centrifugal test, can solve problems such as unreliability

Active Publication Date: 2021-06-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, as time goes by, temperature changes, windage changes, load changes, and changes in positive pressure on the arm bearings will cause the friction coefficient to change continuously. Therefore, it is not enough to rely solely on the motor speed to reflect the G value of the centrifuge acceleration. reliable

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  • Device and method capable of measuring acceleration difference value at different positions of centrifugal machine hanging basket
  • Device and method capable of measuring acceleration difference value at different positions of centrifugal machine hanging basket
  • Device and method capable of measuring acceleration difference value at different positions of centrifugal machine hanging basket

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Embodiment Construction

[0026] A device that can measure the difference in acceleration at different positions of the centrifuge basket, the test device 2 is fixed on the bottom panel 3 of the centrifuge basket 1, the test device 2 includes a device shell bracket 6, and is located on the Bottom pipeline 7, nine measuring tubes 8, pore pressure sensor 4 and camera 5 in the device shell 6; liquid is housed in the measuring tube 8, which is used to measure the liquid level at different positions at the bottom of the centrifuge basket 1, The liquids in the nine measuring tubes 8 communicate with each other through the bottom pipeline 7; the measuring tubes 8 are transparent and engraved with measuring tube scale lines 9; the pore pressure sensor 4 is located at the bottom of the measuring tubes 9 and can measure The pore pressure here; the camera 5 is used to photograph the liquid level in the measuring tube 8 .

[0027] The shell bracket 6 is a lightweight support bracket made of 7075 aluminum alloy; th...

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Abstract

The invention discloses a device and method capable of measuring acceleration difference values of different positions of a centrifugal machine hanging basket, and the method comprises the steps: placing a testing device on the centrifugal machine hanging basket, arranging pore pressure sensors at a position, close to a bottom panel, of the testing device, measuring the pore pressure at different positions of the same bottom surface through the pore pressure sensors arranged at different positions, and observing liquid level changes at different positions through the arranged camera. According to the method, stress is analyzed, a formula is deduced, the pore water pressure difference [delta]P and the liquid level height difference [delta]h of the different positions are directly calculated, and the acceleration difference [delta]Gn of each position of the hanging basket bottom plate can be obtained by combining the liquid density [rho]. By means of the method, the acceleration difference value at any position of the centrifugal machine hanging basket can be measured, and a reliable method is provided for correcting and compensating actual centrifugal acceleration at the position of a hanging basket bottom plate.

Description

technical field [0001] The invention belongs to the technical field of centrifuge tests, and in particular relates to a device and method capable of measuring acceleration differences at different positions of centrifuge baskets. By this method, the acceleration difference at any position of the centrifuge basket can be measured, and a reliable method is provided for correcting and compensating the actual centrifugal acceleration at the bottom plate of the basket. Background technique [0002] Geotechnical centrifuges are indispensable scientific research equipment for the development of the geotechnical construction industry, especially large-scale civil buildings, water conservancy bridges, and most of them need to use geotechnical centrifuges to do some preliminary model tests. The geotechnical centrifuge uses a large motor to drive the hanging basket to move in a circle around the bearing, and uses centrifugal force to simulate supergravity. As the set acceleration G va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P15/00
CPCG01P15/00
Inventor 闫子壮黄根清颜哩哩洪帅
Owner ZHEJIANG UNIV