复合材料上层建筑总纵弯曲特性与设计要求分析

夏奕; 李华东; 梅志远

doi:10.19693/j.issn.1673-3185.02471

复合材料上层建筑总纵弯曲特性与设计要求分析

doi: 10.19693/j.issn.1673-3185.02471

夏奕^{1, 2,},
李华东^1,,
梅志远^1, ,

1.
海军工程大学舰船与海洋学院，湖北武汉 430033
2.
中国人民解放军92728部队，上海 200442

基金项目: 国家自然科学基金资助项目（51479205）；海军工程大学自主立项资助项目（2020505040）

详细信息

作者简介:
夏奕，男，1993年生，硕士，助理工程师。研究方向：船舶与海洋结构物设计制造。E-mail：desmondyyy@163.com

李华东，男，1984年生，博士，讲师。研究方向：船用复合材料结构设计与应用。E-mail：lhd0727@163.com

梅志远，男，1973年生，博士，教授，博士生导师。研究方向：船用复合材料结构设计与应用。 E-mail：zhiyuan_mei@163.com

通信作者:
梅志远

中图分类号: U663.6； U668.5
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出版历程
- 收稿日期: 2021-07-30
- 修回日期: 2021-09-02
- 网络出版日期: 2023-03-30
- 刊出日期: 2023-04-28

Longitudinal bending characteristics and design requirements of composite material superstructures

XIA Yi^{1, 2
,},
LI Huadong^1
,,
MEI Zhiyuan^{1
, ,}

1.
College of Naval Architecture and Ocean Engineering, Naval University of Engineering, Wuhan 430033, China
2.
The 92728 Unit of PLA, Shanghai 200442, China

复合材料上层建筑总纵弯曲特性与设计要求分析由夏奕，等创作，采用知识共享署名4.0国际许可协议进行许可。

摘要

摘要: 目的针对复合材料上层建筑总纵强度问题，采用有限元分析法开展复合材料上层建筑总纵弯曲特性与设计要求分析。方法首先，分析不同长度、不同上层建筑材料等效弹性模量下简化船体模型纵向应变沿高度方向的分布规律，并利用二次函数对纵向应变分布进行非线性拟合；然后，基于拟合的结果提出复合材料上层建筑设计要求，并在结构形式与材料属性两方面对设计要求进行阐述；最后，根据弯矩有效度概念，在国军标的基础上提出不同长度、不同材料下上层建筑完全参与总纵弯曲的判定方法。结果分析结果表明，常见的树脂基纤维增强复合材料能够满足上层建筑结构的总纵强度要求；超过0.3倍船长的复合材料上层建筑结构应当计入剖面强度和刚度校核。结论所做研究可为未来我国复合材料上层建筑结构的水面舰船设计提供一定的参考价值。
- 复合材料 /
- 上层建筑 /
- 总纵弯曲 /
- 有效度
Abstract: Objective To tackle the problem of the longitudinal strength of composite superstructures, the finite element analysis method is used to study their longitudinal bending characteristics and design requirements. Method First, an analysis is made of the longitudinal strain distribution along the height direction of a simplified hull model with different lengths and the equivalent elastic moduli of superstructure materials, and the quadratic function is used to perform nonlinear fitting. Second, the design requirements of composite superstructures are proposed based on the fitting results and explained in terms of both structural size and material properties. Finally, based on the concept of bending moment effectiveness and national military standards, a superstructure method with different elastic moduli and lengths is proposed that fully participates in longitudinal bending determination. Results The results show that glass fiber and carbon fiber reinforced plastic reach the longitudinal strength requirements of superstructures, and composite superstructures longer than 0.3 times the length of the hull should be included in section stiffness checks. Conclusion The results of this study can provide references for the future design of naval ships with composite materials.
- composite materials /
- superstructures /
- longitudinal bending /
- effectiveness

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图 1 简化几何模型

Figure 1. Simplified geometric models

下载: 全尺寸图片幻灯片

图 2 模型端面参考点的建立

Figure 2. Establishment of reference point at model end-face

下载: 全尺寸图片幻灯片

图 3 不同长度比的中横剖面纵向应变分布曲线

Figure 3. Longitudinal strain distribution curves of different length ratio in middle cross-section

下载: 全尺寸图片幻灯片

图 4 不同弹性模量比的中横剖面应变分布曲线

Figure 4. Longitudinal strain distribution curves of different elastic modulus ratio in middle cross-section

下载: 全尺寸图片幻灯片

图 5 上层建筑顶部纵向应变值与弹性模量比、长度比的关系

Figure 5. Relationship between elastic modulus ratio, length ratio and longitudinal strain value at the top of superstructure

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图 6 理想的船体剖面及其应变分布示意图

Figure 6. Schematic diagram of ideal hull section and its strain distribution

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图 7 不同$ h和G $下${E}^{*}-{\sigma }^{*}$关系曲线

Figure 7. ${E}^{*}\;{\rm{versus}}\;\; {\sigma }^{*}$ curves under different h and G

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图 8 上层建筑弯矩有效度与模量比和长度比的关系

Figure 8. Relationship between bending moment effectiveness of superstructure and elastic modulus ratio, length ratio

下载: 全尺寸图片幻灯片

图 9 不同长度比、弹性模量比的上层建筑完全参与总纵弯曲划分

Figure 9. Division of superstructure of different length ratio and elastic modulus ratio totally participated in longitudinal bending

下载: 全尺寸图片幻灯片

表 1 模型端面参考点边界条件

Table 1. Boundary conditions of the reference point at model end-face

参考点位置	线位移			角位移
参考点位置	${\delta _x}$	${\delta _y}$	${\delta _{\textit{z}}}$	${\theta _x}$	${\theta _y}$	${\theta _{\textit{z}}}$
舱段后端面	约束		约束
舱段前端面	约束	约束	约束	约束

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表 2 待定参数拟合结果

Table 2. Fitting results of undetermined parameters

待定参数	拟合结果
A	$2.240\; 8 \times {10^7}$
B	$5.197\;4 \times {10^6}$
C	$0.311\;63$
D	$3.421$

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表 3 简化模型弯矩有效度计算结果

Table 3. Calculation results of bending moment effectiveness of simplified models

弹性模量比E^*	弯矩有效度$\gamma $/%
弹性模量比E^*	L^*= 0.1	L^*= 0.15	L^*= 0.2	L^*= 0.3	L^*= 0.4	L^*= 0.5
0.1	1.7	2.8	4.1	6.9	9.5	11.5
0.3	4.6	7.3	10.6	17.4	23.4	27.9
0.5	7.0	10.8	15.4	24.9	33.0	39.0
0.7	9.3	13.2	19.2	30.6	40.2	47.1
1.0	11.4	16.8	23.4	36.9	48.0	55.7

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