摘要
随着国际形式日趋紧张,重要基础设施的抗爆安全愈发受到关注。对于水下爆炸研究,超重力场可以实现水下爆炸冲击波和气泡脉动的同时相似,离心模型试验是爆炸毁伤效应的重要研究手段。结合中国水科院十余年来离心模拟水下爆炸的实践经验,系统介绍了相关设备的系统组成,给出了设备满足的技术指标。通过2组离心模型试验,测试了离心机主轴、吊耳部位及模型箱的振动响应,结果表明:①离心机主轴所受的爆炸冲击响应较小,与正常运转条件下的振动速度基本一致,可以忽略爆炸冲击对离心机整体稳定的影响;②吊耳部位所受的冲击加速度及振动速度较大,可以通过在模型箱布置高弹橡胶减轻吊篮的冲击响应;③试验模型箱的变形基本处于弹性范围,模型箱长边可在跨中布置支撑减小跨中的变形,模型箱壁支座可采用螺栓增加支座的稳定。
With the increasing tension in the international arena,the anti-explosion safety of important infrastructures has attracted increasing attention.For the study on underwater explosion,the centrifugal model tests are an important method to study the damage effects by underwater explosion as the shock wave and bubble oscillation of the underwater explosion can satisfy similarity at the hyper gravity field.Based on the practical experience for the past ten years in centrifuge modeling of underwater explosion,the system composition of the related equipment is introduced.The technical indices of the equipment are presented.The vibrations of the centrifuge and container are monitored by two model tests.The results show that:(1)The impact response by explosion of the centrifuge spindle is small,which is basically the same as the vibration velocity under the normal operating conditions.The influences of explosion on the overall stability of the centrifuge can be ignored.(2)The impact acceleration and vibration velocity of the platform are large,and the impact response to the lifting lugs can be reduced by arranging high-elastic rubber at the bottom of the model.(3)The deformation of the container is basically in the elastic range,and the long side of the container should be supported in the span to reduce the deformation in the center.The bots should be used to increase the stability of the support of the side wall of the container.
作者
胡晶
陈祖煜
雷雨萌
王云超
张紫涛
张雪东
HU Jing;CHEN Zuyu;LEI Yumeng;WANG Yunchao;ZHANG Zitao;ZHANG Xuedong(China Institute of Water Resources and Hydropower Research,Beijing 100048,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2024年第S01期32-36,共5页
Chinese Journal of Geotechnical Engineering
基金
第七届青托工程项目(2021QNRC001)
中国水科院“十四五”期间“五大人才”计划“三型人才”—基础研究型人才项目(GE0199A072021)。
关键词
水下爆炸
离心机
超重力
抗冲击
气泡脉动
underwater explosion
centrifuge
hyper gravity
shock resistance
bubble oscillation
