本文選題：帶筋壁板　切入點：激光噴丸成形　出處：《應用激光》2017年04期

【摘要】：帶筋整體壁板正代替?zhèn)鹘y(tǒng)裝配壁板成為航天領(lǐng)域的重要結(jié)構(gòu)件,但由于筋條的約束作用,其成形較為困難。激光噴丸成形因具有高應變率效應和較強成形能力,是解決帶筋整體壁板成形的重要工藝途徑。詳細闡述了基于固有應變的帶筋壁板激光噴丸成形建模方法,以航天典型網(wǎng)格壁板為例比較了三種不同建模方法的運算效率和精度。證明梁單元模型的計算分析效率相對較高,殼單元適用分析筋條與壁板之間的相對變形。將上述模型應用于帶筋壁板激光噴丸成形變形預測,針對單筋壁板和網(wǎng)格壁板兩種特征帶筋壁板,分析了筋條截面和筋條分布對帶筋壁板激光噴丸成形結(jié)果的影響。證明網(wǎng)格壁板雙向彎曲差異不大,單向筋條有利于成形單曲率曲面,且筋條高厚比和寬高比越小沿筋條方向直線性越好。
[Abstract]:The stiffened integral wall plate is becoming an important structural part in the aerospace field instead of the traditional assembly wall plate. However, because of the constraint of the bar, it is difficult to form. The laser shot peening has high strain rate effect and strong forming ability. It is an important process way to solve the problem of integral panel forming with reinforcement. The modeling method of laser shot peening based on inherent strain is described in detail. The computational efficiency and accuracy of three different modeling methods are compared with typical spaceflight grid panels. It is proved that the calculation and analysis efficiency of the beam element model is relatively high. The shell element can be used to analyze the relative deformation between the steel bar and the wall plate. The above model is applied to predict the deformation of the laser shot peening forming of the stiffened wall plate, aiming at the two characteristics of the single stiffened wall plate and the grid wall plate. The effects of section and distribution of bars on the results of laser shot peening of stiffened panels are analyzed. It is proved that there is little difference in bidirectional bending of grid panels, and that unidirectional bars are favorable for forming curved surfaces with single curvature. And the smaller the ratio of height to thickness and the ratio of width to height, the better the straightness along the direction of the bar.
【作者單位】： 上海交通大學機械與動力工程學院機械系統(tǒng)與振動國家重點實驗室;上海航天設(shè)備制造總廠;
【基金】：航天先進技術(shù)聯(lián)合研究中心技術(shù)創(chuàng)新資助項目(項目編號:USCAST2015-26) 國家自然科學基金面上資助項目(項目編號:51375305)
【分類號】：TN249;V261

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