[1]罗刚,郭正儒,张玉龙,等.水下爆炸冲击波与气泡脉动联合作用下悬浮隧道位移分析[J].长安大学学报(自然科学版),2022,42(2):79-90.
 LUO Gang,GUO Zheng ru,ZHANG Yu long,et al.Displacement analysis of submerged floating tunnel under combinedaction of underwater explosion shock and bubble pulsation[J].Journal of Chang’an University (Natural Science Edition),2022,42(2):79-90.
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水下爆炸冲击波与气泡脉动联合作用下悬浮隧道位移分析()
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长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第42卷
期数:
2022年2期
页码:
79-90
栏目:
桥梁与隧道工程
出版日期:
2022-03-15

文章信息/Info

Title:
Displacement analysis of submerged floating tunnel under combinedaction of underwater explosion shock and bubble pulsation
作者:
罗刚郭正儒张玉龙任毅罗一楠
1. 长安大学 公路学院,陕西 西安 710064; 2. 绍兴文理学院 土木工程学院,浙江 绍兴 312099
Author(s):
LUO Gang GUO Zhengru ZHANG Yulong REN Yi LUO Yinan
1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. School of Civil Engineering,Shaoxing University, Shaoxing 312099, Zhejiang, China
关键词:
隧道工程悬浮隧道水下爆炸冲击波气泡脉动位移分析
Keywords:
tunnel engineering submerged floating tunnel underwater explosion shock wave bubble pulsation displacement analysis
文献标志码:
A
摘要:
为了研究悬浮隧道在水下爆炸冲击波和气泡脉动联合作用下的位移响应,将悬浮隧道简化为可活动弹性支座有阻尼锚索连续弹性支撑梁,基于Hamilton原理建立运动微分方程,通过Galerkin法和RungeKutta法,运用Mathematica编程对其进行求解;对所建立的冲击波与气泡脉动联合荷载模型和悬浮隧道模型进行了验证,并对比例距离、爆点倾角、爆点深度、锚索参数和管体参数等影响因素进行了对比分析,对影响参数的重要性进行了深入分析并给出了合理建议。结果表明:水下爆炸冲击波与气泡脉动联合作用对悬浮隧道系统的位移响应影响显著,基于理论计算结果,当爆点倾角分别取最不利工况时,结构Y方向最大位移远大于Z方向,即爆点倾角的改变对结构位移响应影响较大;随着比例距离、爆点深度、锚索刚度、锚索阻尼和隧道长度的增大,管体跨中最大位移呈衰减趋势,且比例距离和锚索刚度的增大对结构位移响应有较好的抑制作用;随着锚索间距增大,管体跨中最大位移呈增长趋势,且锚索间距的改变对结构位移响应影响显著。在悬浮隧道设计阶段应着重考虑锚索刚度的选择和锚索间距的布置,从而保证结构在运营过程中的安全。提出的可活动弹性支座有阻尼锚索连续弹性支撑梁模型及水下爆炸冲击波与气泡脉动联合荷载模型,更符合实际运营情况,具有较好的可靠性,该研究对悬浮隧道设计有一定参考价值。
Abstract:
In order to study the displacement response of the submerged floating tunnel under the combined action of underwater explosion shock and bubble pulsation, the submerged floating tunnel was simplified into a continuous elastic support beam with damping anchor cable and movable elastic support. The motion differential equation was established based on Hamilton principle, and it was solved by Galerkin method and RungeKutta method with Mathematica. The established combined load model of shock wave and bubble pulsation and tunnel model were verified. The influencing factors such as proportional distance, inclination angle of explosion point, different detonation point depths, anchor cable parameters and pipe parameters were compared and analyzed. The importance of influencing parameters was deeply analyzed and reasonable suggestions were given. The results show that the combined effect of underwater explosion shock and bubble pulsation has a significant impact on the displacement response of the submerged floating tunnel system. Based on the theoretical calculation results, the maximum displacement in the Y direction is much larger than that in the Z direction, when the inclination angle of the explosion point is taken as the most unfavorable condition, and the change of the inclination angle of the explosion point has a great influence on the displacement response of the structure. With the increase of the detonation position, the proportional distance, the stiffness of anchor cable, the damping of anchor cable and the length of the tunnel, the maximum displacement of the tube in the middle of the span decreases, and the increase of the proportional distance and the stiffness of anchor cable has a good inhibitory effect on the displacement response of the structure. With the increase of cable spacing, the maximum displacement in the midspan of the pipe body shows an increasing trend, and the change of cable spacing has a significant impact on the structural displacement response. In the design stage of submerged floating tunnel, the selection of anchor cable stiffness and the arrangement of anchor cable spacing should be emphatically considered, so as to ensure the safety of the structure in the operation process. The analysis further shows that the continuous elastic support beam with damping anchor cable and movable elastic support model and combined load model of underwater explosion shock and bubble pulsation proposed are more in line with the actual operation situation and have good reliability. It has certain reference value for the design of submerged floating tunnel, in order to provide reference for the followup study of submerged floating tunnel. 1 tab, 19 figs, 35 refs.

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更新日期/Last Update: 2022-04-13