straight-in loading 中文意思是什麼
straight-in loading
解釋
直線進入裝載-
The main results and academic contributions of the dissertation can be summarized as following : 1 ) for the difficulty to obtain the accurate analytical solution of the stress constraints around 3d cracks, detailed 3d fe analyses have been conducted to study the out - of - plane constraint factor tz around a straight through - thickness crack, a quarter - elliptical corner crack and a semi - elliptical crack embedded in an isotropic elastic plate subjected to uniform remote tension loading. the distributions of tz are minutely studied in the forward section of the cracks. strong 3d zones ( tz > 0 ) along the crack front were investigated despite the far field stress - free boundary conditions
全文主要研究內容和學術貢獻如下: 1 .針對一般三維裂紋端部場應力約束準確解析的困難，對均勻拉伸載荷作用下各向同性彈性板中穿透厚度中心直裂紋、半橢圓表面裂紋和1 / 4橢圓角裂紋進行了大量詳細的全場應力三維有限元分析，首次全面分析了非穿透裂紋端部場三維影響區范圍，給出了不同形狀三維裂紋前沿離面應力約束因子tz的數值解，並結合k場平面解給出了非穿透裂紋端部應力場k - tz雙參數描述。 -
Abstract : according to the deep analysis of the typical punching process, the loading charts and the amplitude - frequency curves of straight side cnc turret press frame are obtained. in the end the dynamic response of a typical process is calculated using modal superposition method by fem software marc and the static and dynamic stress of some nodes is compared as well
文摘:根據板料沖裁時的工作負荷圖確定了數控回轉頭壓力機的動載荷譜，並通過傅立葉展開，獲得了壓力機的幅頻譜，最後通過marc軟體採用模態疊加法計算了典型沖裁時機身的動態響應，分析了其動態特性，並對特徵點的動靜態應力進行了比較。
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