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Volume 54 Issue 6
Nov.  2019
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Article Contents
Journal of Southwest Jiaotong University  > 2019  >  54(6): 1305-1313.
LÜ Jinzhou, ZHANG Xiaoqing, ZHAO Xiaonan, CHEN Guangxiong, WU Yingchuan. Structural Dynamic Characteristics of Force-Measurement System for Impulse Wind Tunnel[J]. Journal of Southwest Jiaotong University, 2019, 54(6): 1305-1313. doi: 10.3969/j.issn.0258-2724.20170737
Citation: LÜ Jinzhou, ZHANG Xiaoqing, ZHAO Xiaonan, CHEN Guangxiong, WU Yingchuan. Structural Dynamic Characteristics of Force-Measurement System for Impulse Wind Tunnel[J]. Journal of Southwest Jiaotong University, 2019, 54(6): 1305-1313. doi: 10.3969/j.issn.0258-2724.20170737
shu

Structural Dynamic Characteristics of Force-Measurement System for Impulse Wind Tunnel

doi: 10.3969/j.issn.0258-2724.20170737
  • Received Date: 18 Oct 2017
  • Rev Recd Date: 31 Aug 2018
    • Available Online: 05 Sep 2018
  • Publish Date: 01 Dec 2019
    Abstract
  • During testing in impulse wind tunnel, vibrations of the force-measurement system (FMS) caused by airflow will greatly tamper measurement results. To solve this issue, firstly the dynamic model of the FMS was constructed according to its structural characteristics. Then, the virtual calibration and modal analysis were carried out. Thirdly, the transient analysis and inertia compensation were processed to obtain the response of the FMS. Finally, the force measurement tests was conducted in the impulse wind tunnel, and both the elastic and inertia outputs were obtained in tests. Results show that after inertia compensation, the mean measurement accuracy were improved, and the transient measurement accuracy were improved significantly. When there was resonance, the lowest transient measurement accuracy was 87.4% after inertia compensation. In the other cases, the transient measurement accuracy exceeded 91%. Vibrations on the output curves of the FMS were virtually smoothed after inertia compensation, demonstrating that inertia compensation can eliminate the disturbance in the outputs.

     

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