chart drum 中文意思是什麼

chart drum 解釋
卷紙筒
  • chart : n 1 海圖，航（線）圖，航海圖；地勢圖（＝physical chart），（軍用）地形圖（＝topographic chart）。...
  • drum : n 1 鼓。2 鼓聲，擊鼓般的聲音；麻?的叫聲；〈古語〉鼓手。3 鼓狀物；圓桶，汽油桶；【機械工程】滾筒，...
  1. The recording chart on an autographic rain - gauge is mounted on a drum which is driven by clockwork and typically rotates round a vertical axis once per day

    自記式雨量器的記錄表卷在記錄筒上，該筒由時鐘裝置推動，通常軸心垂直，每天自轉一周。
  2. The main content of this paper contains : summarizing the foundational theory of vibration and noise, and establishing the analysis and computation flow chart of noise acoustic field of mechanical vibration ; taking a close drum shell as the research object, analyzing its dynamic characteristics and vibration response using finite element method, then going with the structural - acoustic coupling analysis based on the acoustic model analysis of the aerial intracavity of the close drum shell

    論文的主要內容包括：對振動和噪聲的基礎理論進行了概述，並建立了結構振動噪聲聲場分析計算的流程圖。以封閉鼓形薄殼為分析對象，運用有限元法分析了其的動態特性及振動響應；同時在分析了封閉鼓形薄殼空氣內腔的聲學模態的基礎上，對其進行了聲固耦合分析；並作了該結構模型的外場聲固耦合諧響應分析。
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