本文選題：柔性抗船撞裝置　切入點：沖擊載荷　出處：《爆炸與沖擊》2017年03期

【摘要】：針對中國自主研發(fā)的橋梁柔性抗船撞裝置,構(gòu)建該裝置模型:由兩個相似的六邊形梁為內(nèi)外鋼圍以及均布且垂直于六邊形各邊的防撞圈構(gòu)成。分析該模型得到在沖擊載荷作用下六邊形梁的控制方程及相應(yīng)的初邊值條件。利用Laplace變換和數(shù)值Laplace逆變換對該方程進(jìn)行求解,揭示六邊形梁在沖擊載荷作用下的動態(tài)響應(yīng)。并進(jìn)一步分析外鋼圍等效抗彎剛度對抗船撞裝置動態(tài)響應(yīng)的影響,發(fā)現(xiàn)外剛圍結(jié)構(gòu)在沖擊載荷作用下存在臨界等效抗彎剛度。當(dāng)外鋼圍等效抗彎剛度達(dá)到該臨界值后,該外鋼圍在沖擊載荷作用下可以近似為剛性。
[Abstract]:Aiming at the flexible anti-ship collision device of bridge developed independently in China, The model of the device is constructed, which is composed of two similar hexagonal beams, which are inner and outer steel girth and anti-collision rings that are uniformly distributed and perpendicular to each side of hexagonal beams. The governing equations of hexagonal beams under impact load and the corresponding corresponding equations are obtained by analyzing the model. Laplace transform and inverse Laplace transform are used to solve the equation. The dynamic response of hexagonal beam under impact load is revealed, and the influence of the equivalent bending stiffness of outer steel girth on the dynamic response of ship collision device is further analyzed. It is found that there is a critical equivalent bending stiffness of the outer steel girth under the impact load, and when the equivalent bending stiffness of the outer steel reaches the critical value, the outer steel girth can be approximately rigid under the impact load.
【作者單位】： 寧波大學(xué)機(jī)械工程與力學(xué)學(xué)院;
【分類號】：O313.4;U443.26
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本文編號：1672309