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Construction parameters of graded sand-gravel foundation on seismic response law of nuclear safety grade underground corridor

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Earthquake Research Advances 2022年第4期2卷 39-45页

作者： Yue Li xunqiang yin College of Architecture and Engineering Dalian UniversityNo.10 Xuefu StreetJinzhou DistrictDalian116622China

The treatment of soft soil foundation under nuclear safety grade corridors with graded sand and gravel materials has a good development prospect.It is of great engineering value to explore the influence of construction parameters of graded sand and gravel foundation on the seismic response of gallery structures.Taking the safety grade underground corridor of a nuclear power plant as the engineering background,the equivalent linear method is used to consider the nonlinear dynamic characteristics of graded sand and gravel.The energy transfer boundary is applied at the truncation boundary to simulate the dissipation effect of scattered wave fluctuation energy and the ground motion input.The thicknessless contact element is introduced to consider the contact effect between the corridor structure and the graded sand and gravel foundation,so as to establish the calculation model of the dynamic interaction between the graded sand and gravel foundation and the corridor structure.Furthermore,the influence of the relative compactness and the foundation treatment depth on the seismic response of the corridor structure is studied,and the calculation results of the acceleration response spectrum and relative displacement of the corridor structure are analyzed.The calculation results show that the two construction parameters have different degrees of influence on the seismic response of corridor structure.The research results can provide reference for the engineering design and construction of underground corridors,and provide technical support for the application of graded gravel materials in soft soil foundation treatment.

关键词： nuclear power plants Underground corridor graded sand-gravel foundation Construction parameters Seismic response

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Seasonal variations in wave-induced stress over global ocean based on China France Oceanography Satellite

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Science China Earth Sciences 2023年第12期66卷 2930-2940页

作者： Jing REN Sheng CHEN xunqiang yin Jianqiang LIU ying XU Fangli QiAO College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Key Laboratory of Marine Sciences and Numerical Modeling Ministry of Natural ResourcesQingdao 26661China Key Laboratory of Marine Sciences and Numerical Modeling Shandong ProvinceQingdao 266061China National Satellite Ocean Application Service Beijing 100081China

Due to the scarcity of simultaneous observations on global-scale wind and wave spectra,there has been limited research on the characteristics of global wave-induced stress and wind stress with wave effects using observed wave spectra,particularly their seasonal variations.The China France Oceanography Satellite(CFOSAT)for the first time can simultaneously observe global sea surface wind and wave spectra,providing a solid data basis for investigating this difficult issue.In this study,the seasonal characteristics of global sea surface wave-induced stress and wind stress were analyzed by combining one-year simultaneous wind and wave observations from CFOSAT with a wave boundary layer model.Waveinduced stress was divided into wind-wave-induced stress and swell-induced stress based on different wave forms.The results showed that the wave-induced stress presented a significant inverse correlation with swell index.A higher swell index corresponded to a larger proportion of swell-induced stress,resulting in a decrease in wind stress,and vice versa,wind-wave-induced stress was dominant,resulting in an increase in wind stress.From spring to winter in the Northern Hemisphere(NH),wind-wave-induced stress predominated in the westerly belt of the Southern Hemisphere(SH),while swell-induced stress predominated near the equator.Further analysis revealed that the seasonal variation in wind-waveinduced stress in the SH was not significant,however,wind-wave-induced stress during the boreal summer was significantly lower than that in other seasons.The absolute value of swell-induced stress in the SH showed a trend of decrease and then increase from spring to winter.The percentage of increase or decrease in wind stress after considering the waveinduced stress showed a roughly symmetrical pattern between the NH and SH during the spring and autumn seasons,while the summer and winter seasons showed an asymmetrical feature.Wave-induced stress significantly modulated wind stress,resulting in zonal mean variations by up to±30%.This findin

关键词： China France Oceanography Satellite(CFOSAT) Wave-induced stress Wind stress Seasonal characteristics

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A theoretical model for the intrusion of the Kuroshio across the continental shelf of East China Sea

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Science China Earth Sciences 2015年第12期58卷 2289-2295页

作者： ZHANG QingHua QU YuanYuan LI JianKe YIN Xunqiang Key Laboratory of Marine Science and Numerical Modeling The First Institute of OceanographyState Oceanic Administration Marine Services Digital Globe Inc.

Here we use a two-layer model to study the dynamics of the intrusion of the Kuroshio onto the continental shelf. Results show that the interaction of the Kuroshio water and shelf water produces a stable upwelling zone above 100 m depth northeast of Taiwan, which provides a dynamical explanation to the presence of the cold core previously observed by satellite. The affected shelf water from the interaction has an onshore portion, which turns right and becomes a northward alongshore flow when it moves closer to shore. This implies that the Kuroshio water cannot penetrate deep onto the inner part of the continental shelf, but it generates a strong northward jet that is formed mainly by the shelf water.

关键词：东海大陆架黑潮入侵两层模型动力学解释相互作用陆架水上升流区黑潮水

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A comparison of two global ocean-ice coupled models with different horizontal resolutions

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Acta Oceanologica Sinica 2013年第8期32卷 1-11页

作者： SHU Qi QIAO Fangli SONG Zhenya YIN Xunqiang College of Physical and Environmental Oceanography Ocean University of China First Institute of Oceanography State Oceanic Administration Key Laboratory of Marine Science and Numerical Modeling State Oceanic Administration

A global eddy-permitting ocean-ice coupled model with a horizontal resolution of 0.25° by 0.25° is estab- lished on the basis of Modular Ocean Model version 4 （MOM4） and Sea Ice Simulator （SIS）. Simulation results are compared with those of an intermediate resolution ocean-ice coupled model with a horizontal resolution of about 1° by 1°. The results show that the simulated ocean temperature, ocean current and sea ice concentration from the eddy-permitting model are better than those from the intermediate resolu- tion model. However, both the two models have the common problem of ocean general circulation models （OGCMs） that the majority of the simulated summer sea surface temperature （SST） is too warm while the majority of the simulated subsurface summer temperature is too cold. Further numerical experiments show that this problem can be alleviated by incorporating the non-breaking surface wave-induced vertical mixing into the vertical mixing scheme for both eddy-permitting and intermediate resolution models.

关键词： eddy-permitting model intermediate resolution model non-breaking surface wave-induced vertical mixing

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High efficient parallel numerical surface wave model based on an irregular quasi-rectangular domain decomposition scheme

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Science China Earth Sciences 2014年第5期57卷 1869-1878页

作者： ZHAO Wei SONG ZhenYa QIAO FangLi YIN Xunqiang First Institute of Oceanography State Oceanic Administration Key Laboratory of Marine Science and Numerical Modeling (MASNUM) State Oceanic Administration

To achieve high parallel efficiency for the global MASNUM surface wave model, the algorithm of an irregular quasirectangular domain decomposition and related serializing of calculating points and data exchanging schemes are developed and conducted, based on the environment of Message Passing Interface(MPI). The new parallel version of the surface wave model is tested for parallel computing on the platform of the Sunway BlueLight supercomputer in the National Supercomputing Center in Jinan. The testing involves four horizontal resolutions, which are 1°×1°,(1/2)°×(1/2)°,(1/4)°×(1/4)°, and(1/8)°×(1/8)°. These tests are performed without data Input/Output(IO) and the maximum amount of processors used in these tests reaches to 131072. The testing results show that the computing speeds of the model with different resolutions are all increased with the increasing of numbers of processors. When the number of processors is four times that of the base processor number, the parallel efficiencies of all resolutions are greater than 80%. When the number of processors is eight times that of the base processor number, the parallel efficiency of tests with resolutions of 1°×1°,(1/2)°×(1/2)° and(1/4)°×(1/4)° is greater than 80%, and it is 62% for the test with a resolution of(1/8)°×(1/8)° using 131072 processors, which is the nearly all processors of Sunway BlueLight. When the processor's number is 24 times that of the base processor number, the parallel efficiencies for tests with resolutions of 1°×1°,(1/2)°×(1/2)°, and(1/4)°×(1/4)° are 72%, 62%, and 38%, respectively. The speedup and parallel efficiency indicate that the irregular quasi-rectangular domain decomposition and serialization schemes lead to high parallel efficiency and good scalability for a global numerical wave model.

关键词：海浪数值模式并行效率区域分解矩形波模表面分辨率测试消息传递接口

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Evaluation on data assimilation of a global high resolution wave-tide-circulation coupled model using the tropical Pacific TAO buoy observations

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Acta Oceanologica Sinica 2018年第3期37卷 8-20页

作者： SHI Junqiang YIN Xunqiang SHU Qi XIAO Bin QIAO Fangli College of Oceanic and Atmospheric Sciences Ocean University of China The First Institute of Oceanography State Oceanic Administration Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology Key Laboratory of State Oceanic Administration for Marine Sciences and Numerical Modeling The First Institute of OceanographyState Oceanic Administration

In order to evaluate the assimilation results from a global high resolution ocean model, the buoy observations from tropical atmosphere ocean（TAO） during August 2014 to July 2015 are employed. The horizontal resolution of wave-tide-circulation coupled ocean model developed by The First Institute of Oceanography（FIOCOM model） is 0.1°×0.1°, and ensemble adjustment Kalman filter is used to assimilate the sea surface temperature（SST）, sea level anomaly（SLA） and Argo temperature/salinity profiles. The simulation results with and without data assimilation are examined. First, the overall statistic errors of model results are analyzed. The scatter diagrams of model simulations versus observations and corresponding error probability density distribution show that the errors of all the observed variables, including the temperature, isotherm depth of 20°C（D20）, salinity and two horizontal component of velocity are reduced to some extent with a maximum improvement of 54% after assimilation. Second, time-averaged variables are used to investigate the horizontal and vertical structures of the model results. Owing to the data assimilation, the biases of the time-averaged distribution are reduced more than70% for the temperature and D20 especially in the eastern Pacific. The obvious improvement of D20 which represents the upper mixed layer depth indicates that the structure of the temperature after the data assimilation becomes more close to the reality and the vertical structure of the upper ocean becomes more reasonable. At last,the physical processes of time series are compared with observations. The time evolution processes of all variables after the data assimilation are more consistent with the observations. The temperature bias and RMSE of D20 are reduced by 76% and 56% respectively with the data assimilation. More events during this period are also reproduced after the data assimilation. Under the condition of strong 2014/2016 El Ni？o, the Equatorial Undercurrent（EUC） from the TAO is gradually increased during August to

关键词： tropical Pacific tropical atmosphere ocean data assimilation evaluation

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Case study on the three-dimensional structure of meso-scale eddy in the South China Sea based on a high-resolution model

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Acta Oceanologica Sinica 2016年第2期35卷 29-38页

作者： XIA Changshui JUNG Kyung Tae WANG Guansuo YIN Xunqiang GUO Jingsong The First Institute of Oceanography State Oceanic Administration (SOA) Qingdao 266061 China Korea Institute of Ocean Science and Technology Ansan 426-744 Republic of Korea

Meso-scale eddies are important features in the South China Sea（SCS）. The eddies with diameters of 50–200 km can greatly impact the transport of heat, momentum, and tracers. A high-resolution wave-tide-circulation coupled model was developed to simulate the meso-scale eddy in the SCS in this study. The aim of this study is to examine the model ability to simulate the meso-scale eddy in the SCS without data assimilations The simulated Sea Surface Height（SSH） anomalies agree with the observed the AVISO SSH anomalies well. The simulated subsurface temperature profiles agree with the CTD observation data from the ROSE（Responses of Marine Hazards to climate change in the Western Pacific） project. The simulated upper-ocean currents also agree with the main circulation based on observations. A warm eddy is identified in winter in the northern SCS. The position and domain of the simulated eddy are confirmed by the observed sea surface height data from the AVISO. The result shows that the model has the ability to simulate the meso-scale eddy in the SCS without data assimilation.The three-dimensional structure of the meso-scale eddy in the SCS is analyzed using the model result. It is found that the eddy center is tilted vertically, which agrees with the observation. It is also found that the velocity center of the eddy does not coincide with the temperature center of the eddy. The result shows that the model has the ability to simulate the meso-scale eddy in the SCS without data assimilations. Further study on the forming mechanism and the three-dimensional structure of the meso-scale eddies will be carried out using the model result and cruise observation data in the near future.

关键词： meso-scale eddy South China Sea high-resolution wave-tide-circulation coupled model

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The prediction on the 2015/16 El Nino event from the perspective of FIO-ESM

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Acta Oceanologica Sinica 2015年第12期34卷 67-71页

作者： SONG Zhenya SHU Qi BAO ying YIN Xunqiang QIAO Fangli First Institute of Oceanography State Oceanic Administration Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology

Recently atmospheric and oceanic observations indicate the tropical Pacific is at the El Ni？o condition. However,it＇s not clear whether this El Ni？o event of this year is comparable to the very strong one of 1997/98 which brought huge influence on the whole world. In this study, based on the Ensemble Adjusted Kalman Filter（EAKF）assimilation scheme and First Institute of Oceanography-Earth System Model（FIO-ESM）, the assimilation system is setup, which can provide reasonable initial conditions for prediction. And the hindcast results suggest the skill of El Ni？o-Southern Oscillation（ENSO） prediction is comparable to other dynamical coupled models. Then the prediction for 2015/16 El Ni？o by using FIO-ESM is started from 1 November 2015. The ensemble results indicate that the 2015/16 El Ni？o will continue to be strong. By the end of 2015, the strongest strength is very like more than 2.0°C and the ensemble mean strength is 2.34°C, which indicates 2015/16 El Ni？o event will be very strong but slightly less than that of 1997/98 El Ni？o event（2.40°C） calculated relative a climatology based on the years1992–2014. The prediction results also suggest 2015/16 El Ni？o event will be a transition to ENSO-neutral level in the early spring（FMA） 2016, and then may transfer to La Ni？a in summer 2016.

关键词： El Ni?o prediction FIO-ESM Ensemble Adjusted Kalman Filter assimilation

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The improvement of the one-dimensional Mellor-Yamada and K-profile parameterization turbulence schemes with the non-breaking surface wave-induced vertical mixing

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Acta Oceanologica Sinica 2013年第9期32卷 62-73页

作者： LI Yan QIAO Fangli YIN Xunqiang SHU Qi MA Hongyu College of Physical and Environmental Oceanography Ocean University of China Key Laboratory of Marine Science and Numerical Modeling (MASNUM) First Institute of OceanographyState Oceanic Administration (SOA)

Both the level 2.5 Mellor-Yamada turbulence closure scheme （MY） and K-profile parameterization （KPP） are popularly used by the ocean modeling community. The MY and the KPP are improved through including the non-breaking surface wave-induced vertical mixing （Bv）, and the improved schemes were tested by using continuous data at the Papa ocean weather station （OWS） during 1961-1965. The numerical results showed that the Bv can make the temperature simulations fit much better with the continuous data from Papa Sta- tion. The two improved schemes overcame the shortcomings of predicting too shallow upper mixed layer depth and consequently overheated sea surface temperature during summertime, which are in fact com- mon problems for all turbulence closure models. Statistical analysis showed that the Bv effectively reduced the mean absolute error and root mean square error of the upper layer temperature and increased the corre- lation coefficient between simulation and the observation. Furthermore, the performance of vertical mixing induced by shear instability and the Bv is also compared. Both the temperature structure and its seasonal cycle significantly improved by including the Bv, regardless of whether shear instability was included or not, especially for the KPP mixing scheme, which suggested that Bv played a dominant role in the upper ocean where the mean current was relatively weak, such as at Papa Station. These results may provide a clue to improve ocean circulation models.

关键词： non-breaking wave-induced mixing mixed layer numerical modeling Papa Station

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复杂非均质场地条件下核电厂联合泵房抗震安全性评价分析

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地震工程与工程振动 2023年第4期43卷 226-234页

作者：尹训强孙华跃大连大学建筑工程学院辽宁大连116622

鉴于核电厂选址的愈发复杂多样性,合理有效地模拟复杂非均质地基条件下抗震I类物项结构的静动力耦合响应是进行抗震安全性评价的关键技术问题。以某核电厂联合泵房的实际厂址地基为背景,针对静动力分析中的边界处理问题,基于Newmark隐... 详细信息

鉴于核电厂选址的愈发复杂多样性,合理有效地模拟复杂非均质地基条件下抗震I类物项结构的静动力耦合响应是进行抗震安全性评价的关键技术问题。以某核电厂联合泵房的实际厂址地基为背景,针对静动力分析中的边界处理问题,基于Newmark隐式积分特点和黏弹性人工边界理论,提出了一种适于静动力耦合分析求解的人工边界模型,并通过创建无厚度紧支黏弹性人工边界单元实现了所开发模型在ANSYS平台的嵌入。进而,通过联合泵房结构静力分析与极大初始时间步分析的对比,验证所提出模型的合理可靠性。最后,从结构应力、响应及地基稳定性等方面对联合泵房进行了综合评价,并就地基局部非均质的影响进行探讨。研究结果表明:实际厂址中局部捕虏体的存在对联合泵房结构的地震响应及地基安全性影响较小,且所建立模型具有较好地解决非线性动力相互作用问题的潜力。

关键词：联合泵房 Newmark隐式算法复杂非均质地基黏弹性人工边界

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