轮印载荷下I型夹层板架结构静强度力学性能试验研究

现代舰船的直升机起降时会通过轮胎将载荷作用于飞行甲板的板架上,这种载荷通常被称为轮印载荷。除此之外,相对于传统加筋板结构形式,I型夹层结构具有轻质、高比强度等优点,是一种可以应用于船舶飞行甲板的新型结构形式。本文针对轮印载荷局部重载和位置不确定的特点,设计了合理的试验贴片方案及加载程序,并将试验数据与理论值对比,分析误差原因,研究I型夹层板架结构的板格在四种典型位置轮印载荷作用下的静强度力学性能。试验结果表明,夹层板架结构在载荷附近测点的应力水平较大,同时其上面板沿船宽方向的弯曲应力大于沿船长方向的弯曲应力,而下面板2个方向的弯曲应力特性与上面板相反。这些结论对于I型夹层板架结构在轮印载荷下的力学性能研究具有重要意义。

Experimental investigation on mechanical properties of static strength of i-core sandwich grillage structure under patch loading

When the helicopter of modern ship takes off and lands on the flight deck, the loading is applied to the grillage by tire, this kind of loading is usually called patch loading. In addition, compared with the traditional stiffened plate structure, I-core sandwich structure has the advantages of light weight and high specific strength, which is a new type of structure that can be applied to the flight deck of ships. In view of the local heavy load and uncertain position of patch loading, a reasonable patch scheme and loading program of the experiment are designed in this paper. Besides, the static strength and mechanical properties of I-core sandwich grillage structure under four typical position load are analyzed and studied in this paper too. The results show that the stress level of the sandwich grillage structure near the load is large, and the bending stress of the upper panel along the ship’s width is greater than that along the ship’s length, while the bending stress characteristics of the lower panel in both directions are opposite to that of the upper panel. These conclusions are of great significance to the research on the mechanical properties of I-core sandwich grillage structure under the patch loading.