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Parameter sensitivity and inversion analysis of a concrete faced rock-fill dam based on HS-BPNN algorithm

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Science china(Technological Sciences) 2016年第9期59卷 1442-1451页

作者： SUN PengMing[[ bao tengfei[[ gu {2.[[ JIANG Ming WANG Tian[[ SHI ZhongWen[[ college of water-{2. and Hydropower Hohai University Nanjing 210098 China State Key Laboratory of Hydrology-water Resources and Hydraulic engineering Hohai University Nanjing 210098 China National engineering Research Center of water Resources Efficient Utilization and engineering Safety Hohai University Nanjing 210098 China Hydrochina Huadong engineering Corporation Hangzhou 310014 China

Considering the complex nonlinear relationship between the material parameters of a concrete faced rock-fill dam(CFRD) and its displacements, the harmony search(HS) algorithm is used to optimize the back propagation neural network(BPNN), and the HS-BPNN algorithm is formed and applied for the inversion analysis of the parameters of rock-fill materials. The sensitivity of the parameters in the Duncan and Chang's E-B model is analyzed using the orthogonal test design. The case study shows that the parameters φ0, K, Rf, and Kb are sensitive to the deformation of the rock-fill dam and the inversion analysis for these parameters is performed by the HS-BPNN algorithm. Compared with the traditional BPNN, the HS-BPNN algorithm exhibits the advantages of high convergence precision, fast convergence rate, and strong stability.

关键词： parameter sensitivity analysis harmony search algorithm back propagation neural network parameter inversion concrete faced rock-fill dam

基于解析二阶盲辨识的结构工作模态分析及真假模态区分

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工程力学 2024年第1期41卷 249-256页

作者：李涧鸣包腾飞周喜武高瑾瑾顾昊河海大学水文水资源与水利工程科学国家重点实验室南京210098 河海大学水利水电学院南京210098 三峡大学水利与环境学院宜昌443002 江苏省水利工程科技咨询股份有限公司南京210029 水利部交通运输部国家能源局南京水利科学研究院南京210029

自动获取运行中的模态参数对于大型土木结构的健康状态实时在线监测具有重要意义。针对现有方法模态分辨困难的问题,提出了一种基于解析二阶盲辨识的工作模态分析方法,并相应提出了真假模态区分方法以实现模态参数自动识别。与传统方法... 详细信息

自动获取运行中的模态参数对于大型土木结构的健康状态实时在线监测具有重要意义。针对现有方法模态分辨困难的问题,提出了一种基于解析二阶盲辨识的工作模态分析方法,并相应提出了真假模态区分方法以实现模态参数自动识别。与传统方法不同,该方法无需引入稳定图,可直接从结构振动响应中有效分离出各阶模态响应。通过构造模态特征指标和K均值聚类实现真假模态自动区分,并采用频域参数拟合法估计模态参数。通过8自由度数值算例和混凝土重力拱坝工程实例对该文方法效果进行了验证。结果表明:该方法具有较好的模态自动分离和筛选能力,对固有频率、阻尼比和振型的识别精度均较高,尤其对于密集模态的识别具有显著优势。

关键词：结构健康监测模态分析二阶盲辨识自动识别混凝土坝

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Influence of construction interfaces on dynamic characteristics of roller compacted concrete dams

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Journal of Central South university 2015年第4期22卷 1521-1535页

作者： gu Chong-shi WANG Shao-wei bao Teng-fei State Key Laboratory of Hydrology-water Resources and Hydraulic engineering Hohai University National engineering Research Center of water Resources Efficient Utilization and engineering Safety Hohai University college of water-{2. and Hydropower Hohai University

To study the influence of construction interfaces on dynamic characteristics of roller compacted concrete dams(RCCDs),mechanical properties of construction interfaces are firstly analyzed. Then, the viscous-spring artificial boundary(VSAB) is adopted to simulate the radiation damping of their infinite foundations, and based on the Marc software, a simplified seismic motion input method is presented by the equivalent nodal loads. Finally, based on the practical engineering of a RCC gravity dam, effects of radiation damping and construction interfaces on the dynamic characteristics of dams are investigated in detail. Analysis results show that dynamic response of the RCC gravity dam significantly reduces about 2.% when the radiation damping of infinite foundation is considered. Hot interfaces and the normal cold interfaces have little influence on the dynamic response of the RCC gravity ***, nonlinear fracture along the cold interfaces at the dam heel will occur under the designed earthquake if the cold interfaces are combined poorly. Therefore, to avoid the fractures along the construction interfaces under the potential super earthquakes,combination quality of the RCC layers should be significantly ensured.

关键词： roller compacted concrete dam construction interface nonlinear fracture radiation damping viscous-spring artificial boundary dynamic response

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复杂强噪声下坝体微弱振动响应信号提取

应用基础与工程科学学报 2020年第6期28卷 1326-1336页

作者：李慧包腾飞顾冲时河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098 河海大学水利水电学院江苏南京210098 三峡大学水利与环境学院湖北宜昌443002

在基于泄流激励坝体受迫振动响应的结构损伤识别过程中,测得的振动信号不仅包含结构损伤信息,同时还存在大量复杂低频、高频噪声干扰,传统去噪算法很难将坝体微弱振动信号完整提取出来.引入运算效率高、抗噪声强、抗模态混叠的变分模态... 详细信息

在基于泄流激励坝体受迫振动响应的结构损伤识别过程中,测得的振动信号不仅包含结构损伤信息,同时还存在大量复杂低频、高频噪声干扰,传统去噪算法很难将坝体微弱振动信号完整提取出来.引入运算效率高、抗噪声强、抗模态混叠的变分模态分解(VMD)并对其进行改进.改进VMD算法只能滤除高频噪声,而坝体有用振动信号主成分耦合在低频密频噪声中.利用具有主成分提取优势的奇异谱分析(SSA)算法对改进VMD算法重构的信号二次去噪以滤除低频噪声.实验数据表明,该联合算法可为研究基于振动响应的结构损伤识别与定位提供先决条件.

关键词：振动信号变分模态分解奇异谱分析损伤识别受迫振动响应去噪算法

基于分数阶模式的高拱坝变形安全监控研究构想

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水利水电科技进展 2022年第5期42卷 85-93,120页

作者：杨光顾昊刘尚蔚包腾飞孙锦栾博文河海大学水文水资源与水利工程科学国家重点实验室江苏南京210098 华北水利水电大学水利学院河南郑州450046 华北水利水电大学测绘与地理信息学院河南郑州450046

为科学监控服役过程中高拱坝的变形安全,基于高拱坝结构特性和服役特点,在分析分数阶元件模型、混凝土坝物理力学参数反演、混凝土坝变形安全监控发展动态的基础上,依据分数阶建模理论,提出了一种高拱坝变形安全监控研究思路与构想:围... 详细信息

为科学监控服役过程中高拱坝的变形安全,基于高拱坝结构特性和服役特点,在分析分数阶元件模型、混凝土坝物理力学参数反演、混凝土坝变形安全监控发展动态的基础上,依据分数阶建模理论,提出了一种高拱坝变形安全监控研究思路与构想:围绕高拱坝变形性态分数阶数值模拟以及基于分数阶模式的单测点和测点群变形安全监控这两个互相关联的科学问题,沿着“分数阶元件模型→物理力学参数反演→单测点变形安全监控→测点群变形安全监控”的研究主线,遵循“基础到深入、简单到复杂、现象到本质、理论到应用、局部到整体、一维到多维”的原则开展研究。为实现研究构想,重点需攻克三维高应力状态下高拱坝加速流变效应分数阶元件模型、分数阶元件模型弹性和黏弹性物理力学参数反演,以及高拱坝时效变形分数阶分析模型这3个关键的科学技术问题。

关键词：分数阶模式高拱坝变形性态安全监控数值模拟参数反演

独特心墙形式土石坝工程除险加固效能评价分析研究

同方期刊数据库博看期刊评论

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水利建设与管理 2022年第12期42卷 7-12页

作者：顾艳玲杨孟中国水利水电科学研究院北京100038 河海大学水利水电学院江苏南京210098

为探究黏土心墙和混凝土心墙组合形式下独特心墙结构的土石坝工程服役特性,笔者基于其初始条件、边界条件等重要因素,结合其渗流计算方法,借助APDL语言,二次开发了独特心墙结构土石坝工程渗流分析程序,给出了其浸润线的构建方法和渗流... 详细信息

为探究黏土心墙和混凝土心墙组合形式下独特心墙结构的土石坝工程服役特性,笔者基于其初始条件、边界条件等重要因素,结合其渗流计算方法,借助APDL语言,二次开发了独特心墙结构土石坝工程渗流分析程序,给出了其浸润线的构建方法和渗流分析的理论计算方法,对加固前后渗流场进行了模拟分析,对比了大坝加固前后正常蓄水位下渗流场的总水头和压力水头,并求解对比了正常蓄水位下混凝土防渗墙内最大渗透比降、下游坝壳料最大渗透比降、总渗漏流量等数值,对其加固效能进行了定性与定量化的全面有效评价分析。

关键词：独特心墙型式土石坝二次开发加固效能评价分析

CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang {2.ofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen {2.oming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tong{2.ang Cheng Yunlong Chi Pietro Chimenti Wen Han Chiu {2.k Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu {2.glielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH university of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui university HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu university Institute of ScienceVaranasi Bandirma Onyedi Eylul university Bandirma Beihang university Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal university Beijing Brown university ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad university Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo university Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central china Normal university WuhanHubei Central South university ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan china academy of engineering physics MianyangSichuan china building materials academy Beijing china Center of Advanced Science and Technology Beijing china Institute of Atomic Energy Beijing china Jiliang university HangzhouZhejiang china Nuclear Instrument CO. LTDBeijing china university of Geosciences Beijing china university of Geosciences WuhanHubei china university of Mining and Technology XuzhouJiangsu china West Normal university NanchongSichuan Chongqing university Department of PhysicsChongqing Chulalongkorn university Bangkok City university of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell university IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu university DalianLiaoning Dalian university of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East china university Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by china,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2.s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2.15)and the Conceptual Design Report(CDR,2.18),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2.2.-2.2.,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2.30s.

关键词： initiated exceeding precise