﻿ 客滚船车辆甲板结构直接计算模型对比分析
 舰船科学技术  2022, Vol. 44 Issue (10): 16-20    DOI: 10.3404/j.issn.1672-7649.2022.10.004 PDF

Comparative study on the portal frame model of Ro/Ro passenger ship
GAO Chu, YAN Jia-le, LIU Xiao-yuan, ZHOU Su-su
Marine Design and Research Institute of China, Shanghai 200011, China
Abstract: Design and evaluation of a Ro/Ro passenger ship’s vehicle deck primary structural members are generally carried by direct calculation method. The beam model and finite element model are the two most commonly accepted by classification societies. By comparing the results of beam model and the finite element model for a typical portal frame of Ro/Ro passenger ship, shear stress in beam-to-column connection is corrected to make the results of beam model closer to that of the finite element model which could make the structure more reliable at preliminary design stage.
Key words: vehicle deck     portal frame     strength check     shear stress correction
0 引　言

 图 1 客滚船典型横剖面及车辆甲板门式钢架 Fig. 1 Typical portal frame of a Ro/Ro passenger ship
1 车辆甲板门式钢架结构

2 车辆甲板门式钢架直接计算模型分析

 图 2 车辆甲板门式钢架简化模型 Fig. 2 Model extent for typical portal frame

 图 3 门式钢架模型 Fig. 3 Portal frame beam and FEM model

 图 4 门式钢架梁系模型 Fig. 4 Beam model shear stress comparison

 图 5 门式钢架有限元模型 Fig. 5 FEM model shear stress comparison

3 无肘板交叉梁腹板剪应力修正

 图 6 门式钢架无肘板交叉位置处剪切变形及假设的平均剪应变γ Fig. 6 Shear deformation of a bracketless joint

 图 7 有限元模型与梁系模型无肘板端部剪应力比值关系图 Fig. 7 Shear stress relationship between FEM and Beam model
 ${\left( {\frac{{{\tau _{{\text{FEM}}}}}}{{{\tau _{{\text{BEAM}}}}}}} \right)^2} = {0.058^3}{\left( {\frac{L}{H}} \right)^3}，$ (1)

 ${\tau _{{\text{BEAM}}\_Adj}} = {\tau _{{\text{BEAM}}}}\sqrt {{{\left( {0.058L/H} \right)}^3}} 。$ (2)

4 结　语

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