摘要
针对中型邮轮船首玻璃幕墙在波浪砰击下的结构响应进行研究。采用Mie-Grüneisen状态方程描述流体,通过耦合拉格朗日-欧拉方法(CEL)对波浪砰击流固耦合问题进行分析,确定了幕墙结构在砰击载荷下的薄弱环节。分析了波浪砰击幕墙过程中水体、结构的变形特性,确定水体相对结构的砰击速度、砰击角度及水体厚度对结构响应的影响,并采用Cowper-Symonds幂律硬化模型探究了高速砰击下材料应变率硬化效应对结构响应的影响。研究表明:砰击速度和角度是导致幕墙结构大变形的最主要因素,在砰击流体较厚的情况下,结构最大位移随砰击速度增大近似呈指数递增;在低砰击速度下,水体厚度影响并不明显,但随着砰击速度增大,结构最大变形随水体厚度增大近似呈线性递增趋势;在波浪砰击下,应变率硬化效应并不显著。论文的研究对指导中型邮轮玻璃幕墙外形设计及有效的防砰击装置设计具有重要意义。
In this paper,the structural response of medium-sized cruise glass curtain wall under slamming was studied,the mie-Gruneisen equation of state was used to describe the fluid behavior,the coupling Eulerian-Lagrangian method(CEL)was used to analyze the fluid-structure interaction problem under slamming,and the weak link of curtain wall structure under the slamming load was determined.The influence of slamming velocity(V),impact angle(θ)and water thickness(T)on the structural response was analyzed,and the Cowper-Symonds power law hardening model was used to investigate the influence of strain rate hardening effect on structural response under high speed slamming.It indicated that:the slamming velocity,impact angle are the main factors which causes large structure deformation.In the case of slamming fluid with larger thickness,the structural maximum displacement increases exponentially with the increase of slamming velocity.The structural design of curtain wall should avoid the coincidence of the incident direction of water and the normal direction of structural surface,which can be realized by appropriately increasing the backward inclination of the curtain wall,and the velocity direction of the water will deviate from the normal direction of the surface of the structure,so as to reduce the instantaneous change of the momentum of the water and realize sufficient drainage,and reduce the slamming load.In addition,the influence of water thickness is not obvious at low slamming velocity,but with the increase of impact velocity,the maximum structural deformation increases nearly linearly with the increase of water thickness.In addition,the strain rate hardening effect is not significant under wave slamming,especially when V<35 m/s,θ≤20°,the strain rate hardening effect on the response of structure can be ignored.The conclusion of this paper is of great significance to guide the design of glass curtain wall and effective anti-slamming device.
作者
余杨
王华昆
余建星
周吉
袁祺伟
YU Yang;WANG Huakun;YU Jianxing;ZHOU Ji;YUAN Qiwei(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;College of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,China;China merchants cruise ship manufacturing co.,LTD.,Nantong 226000,China)
出处
《中国造船》
EI
CSCD
北大核心
2021年第3期13-27,共15页
Shipbuilding of China
基金
工信部中型邮轮项目(G18473CJ09)
国家自然科学基金面上基金(51879189)。
关键词
邮轮
玻璃幕墙
波浪砰击
流固耦合
耦合欧拉-拉格朗日法
cruise ships
glass curtain wall
slamming
fluid-structure interaction
coupled Euler-Lagrange method
