六边形桥墩柔性抗船撞装置抗弯刚度

发布时间：2018-03-27 16:29

  本文选题：柔性抗船撞装置　切入点：冲击载荷　出处：《爆炸与冲击》2017年03期

【摘要】：针对中国自主研发的桥梁柔性抗船撞装置,构建该装置模型:由两个相似的六边形梁为内外钢围以及均布且垂直于六边形各边的防撞圈构成。分析该模型得到在冲击载荷作用下六边形梁的控制方程及相应的初边值条件。利用Laplace变换和数值Laplace逆变换对该方程进行求解,揭示六边形梁在冲击载荷作用下的动态响应。并进一步分析外钢围等效抗弯刚度对抗船撞装置动态响应的影响,发现外刚围结构在冲击载荷作用下存在临界等效抗弯刚度。当外钢围等效抗弯刚度达到该临界值后,该外钢围在冲击载荷作用下可以近似为刚性。
[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.
【作者单位】： 宁波大学机械工程与力学学院;
【分类号】：O313.4;U443.26
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本文编号：1672309