胡珍伍1，林 焰1,2，陈 明1
（1 大连理工大学船舶工程学院，辽宁 大连 116024；2 工业装备结构分析国家重点实验室，辽宁 大连 116024）

摘要：分析玻璃钢渔船帽型骨材4种有限元模型，结果显示聚氨酯（PU）和聚氯乙烯（PVC）泡沫芯材对骨材强度和刚度影响甚小；松木芯材使骨材最大等效应力减小1.336 MPa，最大变形减小1.202 mm，并影响骨材剪应力分布。研究结果表明：简单结构的骨材模型，泡沫芯材可不计，松木芯材需做适当取舍；而对于船舶等大型复杂结构的模型，骨材芯材影响较小，从偏安全和效率方面考虑，可不计。此研究为玻璃钢渔船有限元模型的简化提供了依据，对玻璃钢渔船结构直接计算及快速设计有重要意义。同时还研究了腹板高度变化对骨材应力和变形的影响，为骨材截面尺寸设计提供参考。

关键词：玻璃钢；渔业船舶；帽型骨材；芯材；有限元法

Effects of core material on
strength and stiffness of fiberglass hull cap-type girder

HU Zhen-wu1, LIN Yan1,2, CHEN Ming1
(1 Department of Naval Architecture, Dalian University of Technology, Dalian 116024, China; 2 State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian 116024, China )

Abstract: Four different finite element models of fiberglass cap-type girder were analyzed in the same conditions. The results showed that polyurethane (PU) and polyvinyl chloride (PVC) foam core material nearly had no contribution to the strength and stiffness of fiberglass cap-type girder; While pinewood core material made the maximum equivalent stress and the maximum deformation of girder decrease 1.336 MPa and 1.202 mm respectively. It was worth noting that pinewood core material affected the shear stress distribution of girder. This research indicates that foam core material in simple models can be negligible, and pinewood needs to be done in appropriate trade-offs. For large and complex composite material structures, such as Glass Fiber Reinforced Plastics (GFRP) ship, from the security and efficiency aspects to consider, the core material of girder could be ignored in their models. This study provides a basis for the simplification of GFRP fishing vessel finite element model and makes great significance to its direct calculations and rapid design. Furthermore, by changing the web height of fiberglass cap-type girder, the stress and deformation responses were studied. This has a certain reference value for the design of girder cross-sectional dimensions.

Key words: GFRP; fishing vessel; cap-type girder; core material; finite element method

基金项目：国家公益性行业科研专项“渔业节能关键技术研究与重大装备开发”（201003024）；大连市科技计划项目（2011B12NC052）
作者简介：胡珍伍（1986—），男，硕士研究生，研究方向：船舶与海洋结构物设计制造。E-mail:hzwyys@163.com
通讯作者：林焰（1963—），男，教授，研究方向：船舶与海洋工程。E-mail:linyanly@dlut.edu.cn

（来源：《渔业现代化》2012,40(1):45-49，62）