基于EBF神经网络的复合材料耐压壳性能研究

发布时间：2018-01-05 12:07

本文关键词：基于EBF神经网络的复合材料耐压壳性能研究　出处：《哈尔滨工程大学学报》2016年10期 　论文类型：期刊论文

【摘要】：为了对水下航行器非均匀内部环肋复合材料耐压壳进行高效率结构性能设计,基于复合材料可设计性特点,应用复合材料细观力学刚度的材料力学理论与有限元分析方法对耐压壳结构进行力学仿真分析,结合EBF椭圆基神经网络近似模型技术以及拉丁超立方设计试验方法从细观层面对组分材料属性在非均匀环肋复合材料耐压壳性能中的影响进行研究。结果表明:纤维和基体的弹性模量对耐压壳结构材料力学性能影响最大,剪切模量对各力学性能影响都很小。在组分材料属性一定的情况下,随着纤维体积分数增加,Tsai-Wu失效指数和临界失稳压力有所提高,而相邻肋骨中点处壳板周向应力、肋骨处壳板轴向应力和肋骨应力随之降低。因此,在非均匀环肋复合材料耐压壳设计过程中应重点考虑较大弹性模量以及适当纤维体积分数的组分材料以达到结构性能最优化的目的。
[Abstract]:In order to design the high efficiency structure performance of the non-uniform inner ring rib composite pressure shell of underwater vehicle, based on the design property of composite material. Based on the theory of material mechanics and the finite element analysis method of composite material mechanics stiffness, the mechanical simulation analysis of compressive shell structure is carried out. In combination with EBF elliptic basis neural network approximation model technique and Latin hypercube design test method, the effect of component material properties on the properties of nonuniform ring rib composite compression shells was studied from a meso level. The results are shown in the table. Clear:. The elastic modulus of fiber and matrix has the greatest influence on the mechanical properties of the structure materials. The shear modulus has little effect on the mechanical properties. With the increase of fiber volume fraction, the Tsai-Wu failure index and critical instability pressure increase with the increase of fiber volume fraction. The circumferential stress of the shell plate at the midpoint of the adjacent rib, the axial stress of the shell plate at the rib and the stress of the rib are reduced. In order to optimize the structure performance, the material with large elastic modulus and proper fiber volume fraction should be considered in the design of non-uniform ring rib composite pressure shell.
【作者单位】：哈尔滨工程大学水下机器人技术重点实验室;哈尔滨工程大学船舶工程学院;
【基金】：国家自然科学基金项目(51009040)
【分类号】：U661.4;U668.5
【正文快照】： 150001)网络出版地址:http://www.cnki.net/kcms/detail/23.1390.u.20160829.1421.046.html作为海洋勘探不可缺少的技术装备,水下航行器已经越来越多的引起各国学者的关注。耐压壳结构是水下航行器主要结构之一,它不但是舱室内部各分类系统设备正常工作的重要保证,也在减少结

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