波纹夹层板轮印载荷分配与极限承载能力研究

发布时间：2018-03-22 23:11

本文选题：加筋板　切入点：波纹夹层板　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：船舶上设有直升机甲板,直升机起飞、降落以及停放在甲板结构上时,直升机通过主轮组产生轮印载荷作用于甲板结构,这涉及到轮印载荷在板和骨材之间的分配,以及板格结构的强度、稳定性及极限承载问题。因此,深入开展轮印载荷分配研究,提出具有实用性的实验方法,更加准确模拟轮印载荷分配是十分必要的。首先,本文开展了加筋板轮印载荷分配的实验研究。利用薄膜压力传感器测试轮印载荷区域典型位置的接触压力,采用电阻式应变片测试关注位置的应变,对比分析了几种典型轮印位置、轮印大小和轮印橡胶厚度下的轮印载荷分布特性,获得了加筋板轮印载荷分配特征。之后,基于有限元软件ANSYS的非线性计算方法,提出了分析轮印载荷分配的数值模型,并对实验的各种载荷工况进行了仿真计算分析,对比了各测点的接触压力和静态应变的实测值与有限元结果,结果表明有限元结果与实验结果吻合较好。采用验证了的数值计算模型,进一步分析了橡胶厚度、硬度、板和加强筋相对刚度比、轮印大小等参数对轮印载荷分布规律的影响。继而,进一步研究了波纹夹层板轮印载荷分配特征,建立了其数值分析模型,分析了波纹夹层板上下面板厚、芯层板厚、芯层层高及轮印位置等参数对轮印载荷分布规律的影响,获得了波纹夹层结构的轮印载荷分布规律。最后,分析了波纹夹层板条在纯弯曲载荷下的极限承载能力,获得了波纹夹层板条在纯弯曲载荷下的失效模式和极限承载能力,并与实验结果进行了对比,分析了波纹夹层板条上面板厚度、芯层厚度及下面板厚度对结构在纯弯曲载荷下极限承载能力的影响。本文研究工作为加筋板、波纹夹层板的轮印载荷分配及极限承载能力计算提供了有益的参考。
[Abstract]:The ship is equipped with a helicopter deck, the helicopter took off, landing and parking on the deck structure, by helicopter main wheel group India wheel load on the deck structure, which relates to the distribution of wheel load India between the plate and the aggregate, and the strength of plate grid structure, stability and ultimate bearing. Therefore, carry out the wheel the load distribution of India, proposed a feasible method, more accurate simulation of India wheel load distribution is very necessary. Firstly, this paper carried out experimental study of stiffened plate printing wheel load distribution. Using the thin film pressure sensor testing contact pressure in typical position of wheel load area of India, the resistance strain gauge testing is concerned the position of the strain, the comparative analysis of several typical printing wheel position, wheel size and the thickness of rubber wheel India India India under the wheel load distribution characteristic, obtained the stiffened plate wheel load distribution characteristics of India. After the calculation method of nonlinear finite element software ANSYS based on the proposed numerical model analysis of wheel load distribution of India, and the various loading conditions were simulated, compared each measuring point of contact pressure and static strain measurements and finite element results, the results show that the finite element results are in good agreement with the experiment results. A numerical calculation model is verified, further analysis of the rubber thickness, hardness, plate and stiffener relative stiffness ratio, influence of size parameters on the wheel wheel India India load distribution. And then, further study of the corrugated sandwich plate printing wheel load distribution characteristics, the numerical analysis model is established, corrugated sandwich the board under the panel thickness of core layer thickness, core layers of high and round printing position parameters on the wheel load distribution in India, obtained the corrugated sandwich structure of wheel load distribution. Finally, india, Analysis of the bearing capacity of corrugated sandwich panels in the limit under pure bending load, the corrugated sandwich slab under pure bending load failure mode and ultimate bearing capacity, and compared with the experimental results, the thickness of corrugated sandwich panel strip of core layer thickness and panel thickness of the bearing capacity of the structure in the under pure bending load limit. This research work for the stiffened plate, provides a useful reference for calculation of corrugated sandwich plates printing wheel load distribution and ultimate bearing capacity.

【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U661.43

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