摘要
对围壳模型进行试验与数值模拟,分析开孔对围壳流激振动特性的影响。首先进行无动力自由上浮试验,在试验中测得了一系列的振动加速度线谱,然后建立与试验相同的数值计算模型,采用大涡模拟法对围壳附近的流场进行了精细的模拟,并将流场的压力作为载荷,运用FEM/BEM结合的方法计算了围壳的流激振动。仿真结果表明,该方法可以清晰的模拟流激围壳振动现象,围壳开孔后会引起流场周期性振荡,从而激励结构振动,产生振动加速度线谱,数值方法计算的振动线谱频率和试验结果接近,平均误差为1.41%。流激开孔围壳振动集中在开孔的导边与随边,尤其是孔腔随边,对这些区域采取控制措施是下一步研究目标。
A finite element model and its boundary conditions of quayside gantry crane are established in this paper.The first ten natural frequencies, the corresponding mode shapes and time-history of displacement response are given based on the analysis of the modes and dynamic response of this gantry crane system. The calculation and analysis above may be helpful for preventing the gantry crane from working on resonant area and for keeping the oversize dynamic deformation under restraint, which can be applied to design quayside gantry crane systems.
作者
张翰钦
郑国垠
孙国仓
黎雪刚
陈明
ZHANG Han-qin ZHENG Guo-yin SUN Guo-cang LI Xue-gang CHEN Ming(Wuhan Second Ship Design and Research Institute, Wuhan 430205, Chin)
出处
《舰船科学技术》
北大核心
2017年第6期66-71,共6页
Ship Science and Technology
基金
国家自然科学基金资助项目(51409199)
关键词
流激振动
围壳开孔
上浮试验
flow induced vibration
cavity on sail
buoyant model experiment
