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風(fēng)洞模型載荷實(shí)驗測量系統開(kāi)發(fā)與研究
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V211

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上海交通大學(xué)實(shí)驗室創(chuàng )新研究基金(17SJ-03)


Design and Research on Wind Tunnel Model Experiments
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    摘要:

    本文為解決風(fēng)洞實(shí)驗室模型風(fēng)載荷實(shí)驗測量相關(guān)技術(shù)問(wèn)題而展開(kāi)。根據該類(lèi)型實(shí)驗特點(diǎn)及要求,設計了測量系統方案,組建測量軟硬件系統,采用多種傳感器完整測量風(fēng)載荷、風(fēng)速、溫濕度等多種數據,進(jìn)行數據融合處理得到風(fēng)載荷系數;為確保實(shí)驗測量精度,考慮了天平零漂、空氣密度變化、模型自重干擾等因素的影響,通過(guò)分析給出了其各自的數據處理方法以得到有效的風(fēng)載荷;在此基礎上完成測量程序的編寫(xiě),基本實(shí)現實(shí)驗測量自動(dòng)化,避免手工介入,大幅提高了實(shí)驗效率。最后應用本文結果展開(kāi)實(shí)際實(shí)驗測量,定量分析各因素對于測量結果的影響,結果表明,空氣密度變化、模型自重干擾、風(fēng)速波動(dòng)對模型風(fēng)載荷結果影響較為明顯,在計算風(fēng)載荷系數時(shí)需采用每一工況的實(shí)時(shí)數據;而信號噪聲對均值結果幾乎無(wú)影響而不用考慮。

    Abstract:

    This paper aims to develop an integrated measurement system on wind load experiments with automation technique support, which would solve application measurement problems of the authors’ laboratory. A measurement scheme is proposed including hardware and software systems with fully detailed specifications, to improve experiment accuracy, several kinds of sensors/balances are employed to fully measure wind load, wind speed, air temperature and humidity, etc. Data process methods are given to handle the problems of balance’s zero point drift, air density determination, model weight influence. Based on the above, an online software program is coded with consideration of automatic data process and sensors compatibility, it implements many functions on wind load experiments, in order to improve efficiency and avoid manual operations. At the end, an experiment on an offshore service vessel is conducted to verify the job of this paper, which shows agreeable result and high efficiency, corresponding analysis is also carried out to verify every factors’ influence, the results show that air density fluctuation, model weigh influence and wind speed fluctuation have remarkable effect on experiment result, while signal noise has litter effect.

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吳小峰,王飛,葉永林.風(fēng)洞模型載荷實(shí)驗測量系統開(kāi)發(fā)與研究計算機測量與控制[J].,2019,27(3):34-38.

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歷史
  • 收稿日期:2018-08-28
  • 最后修改日期:2019-02-21
  • 錄用日期:2018-10-09
  • 在線(xiàn)發(fā)布日期: 2019-03-15
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