期刊文献+

水中悬浮隧道在冲击载荷作用下的计算模型与数值模拟 被引量:18

CALCULATION MODEL AND NUMERICAL SIMULATION OF SUBMERGED FLOATING TUNNEL SUBJECTED TO IMPACT LOADING
下载PDF
导出
摘要 建立了水中悬浮隧道在冲击载荷作用下的简化计算模型。用等效质量法将圆柱壳分布质量折算成冲击点处的集中质量,模型中考虑流体附加质量和系统阻尼的影响。根据碰撞过程中的动量守恒、变形过程中的能量守恒以及结构的位移与内力关系,得到问题的解析解。为验证解析解,在ANSYS/LS-DYNA中建立了动态冲击有限元分析模型。通过算例分别考察了在忽略和考虑流体附加质量两种情况下,冲击点位置和冲击速度对冲击点处最大径向位移的影响,将解析解与数值解进行对比,结果吻合较好。然后采用数值模拟方法得到了系统阻尼对计算结果的影响规律。数值模拟过程中还可以得到冲击点处的最大Mises应力。 A calculation model for submerged floating ttmnel (SFT) subjected to impact loading is developed, The distributed mass of the cylindrical shell is converted into concentrated mass at the impact position. Based on energy conservation during deformation process, momentum conservation during impact and the relationship between displacements and internal forces, the analytical solution is obtained, which considers the effects of added water mass and system damping. In order to verify the analytical result, a f'mite element model of impact is established using the ANSYS/LS-DYNA code. A simulation example is given to examine the effects of impact position and impact velocity on the maximum radial displacement at impact position. Both cases with and without added water mass are considered. The analytical solution and numerical simulation are compared, showing that they are in good agreement. The effects of system damping on the results are obtained by further numerical simulation. During the numerical simulation, the maximum von Mises stress at impact position can also be obtained.
出处 《工程力学》 EI CSCD 北大核心 2008年第2期209-213,共5页 Engineering Mechanics
基金 国家自然科学基金重点项目(10532070)
关键词 水中悬浮隧道 冲击载荷 附加质量 阻尼 数值模拟 submerged floating ttmnel impact load added mass damping numerical simulation
  • 相关文献

参考文献12

  • 1Remseth S, Leira B J, Okstad K M, Mathisen K M.Dynamic response and fluid/structure interaction of submerged floating tunnels [J]. Computers and Structures, 1999, 72(4): 659-685. 被引量:1
  • 2Kunisu H, Mizuno S, Mizuno Y, Saeki H. Study on submerged floating tunnel characteristics under the wave condition [C]// Proc. of the international offshore and polar engineering conference. Osaka: ISOPE, 1994, 27-32. 被引量:1
  • 3Morita S, Yamashita T, Mozimp Y, Mineta M, Kurosaki K. Earthquake response analysis of submerged floating tunnels considering water compressibility [C]//Proc. of the international offshore and polar engineering conference. Osaka: ISOPE, 1994, 20-26. 被引量:1
  • 4Fogazzi P, Perotti F. The dynamic response of seabed anchored floating tunnels under seismic excitation [J]. Earthquake Engineering and Structural Dynamics, 2000, 29:273-295. 被引量:1
  • 5麦继婷,杨显成,关宝树.波流作用下悬浮隧道的动态响应分析[J].水动力学研究与进展(A辑),2005,20(5):616-623. 被引量:12
  • 6Blevins R O. Formulas for natural frequency and mode shape [M]. New York: Van Nostrand Reinhold Company, 1979. 被引量:1
  • 7贾学敏.海岸高桩码头结构受地震和海浪荷载作用的近似计算[J].振动.测试与诊断,1993,13(1):17-23. 被引量:3
  • 8成祥生.闭合圆柱壳在冲击载荷下的动力计算.应用数学和力学,1989,10(2):167-172. 被引量:1
  • 9诺夫日洛夫 B B.薄壳理论[M].北京:科学出版社,1959. 被引量:1
  • 10吴连元,许昌.圆柱壳体在移动集中荷载作用下的弯曲解[J].上海交通大学学报,1989,23(5):45-54. 被引量:7

二级参考文献19

共引文献131

同被引文献147

引证文献18

二级引证文献75

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部