船舶加筋板与点阵夹层结构三点弯曲性能对比研究

A comparative study of three-point bending properties of ships stiffened plates and lattice sandwich structures

通过实验、数值方法对船舶加筋板和点阵夹层板的三点弯曲性能开展研究。首先,通过3D打印制备加筋板和点阵夹层板的试件,并在力学试验机上开展三点弯曲试验。实验结果表明,点阵夹层板相比于加筋板具有更好的力学性能,在质量相同的情况下,点阵夹层板的强度相比于加筋板提高了42.86%,刚度提高了63.79%;接着利用LS-DYNA有限元软件建立加筋板和夹层结构的三点弯曲有限元模型,对三点弯曲实验过程进行模拟,结果表明数值模拟与实验结果具有良好的一致性,数值方法可以用于船舶点阵夹层板设计。

The three-point bending properties of ship stiffened plate and lattice sandwich plate are studied by experi-mental and numerical methods.Firstly,by 3D printing the specimens of ship stiffened plate and the lattice sandwich panel and carrying out the three-point bending test on the mechanical test machine,the experimental results show that the lattice sandwich panel has better mechanical properties than ship stiffened plate.Under the condition of the same mass,the strength of the lattice sandwich panel is increased by 42.86%and the stiffness is increased by 63.79%.Then LS-DYNA finite ele-ment software is used to establish the three-point bending finite element model of the stiffened plate and sandwich structure,and the experimental process of the three-point bending is simulated.The results show that the numerical simulation has a good agreement with the experimental results,and the numerical method can be used in the design of the ship lattice sand-wich plate.