Experimental setup for three-degree-of-freedom large-amplitude free vibration in wind tunnel test
US10900865B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2018 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Jul 27, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M9/062
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An experimental setup for three-degree-of-freedom large-amplitude free vibration in a wind tunnel test. The setup includes a rigid test model, rigid circular rods, rigid lifting arms, arc blocks with grooves, lightweight high-strength thin strings, linear tensile springs, fixed pulleys, and bearings. Large-amplitude three-degree-of-freedom free vibrations of test models can be adapted by the vertical deformation of the springs without any tilt. The possible nonlinear mechanical stiffness due to vertical spring tilt and lateral spring deflection are excluded. It is convenient to install the test model and adjust the initial angle of attack in the new experimental setup. The linear stiffness property and hence constant vibration frequency can be ensured for very large-amplitude vibrations due to the eliminations of spring deflection and tilt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.