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Key Technologies of the Hydraulic Structures of the Three Gorges Project

Xinqiang Niu

Engineering 2016, Volume 2, Issue 3, Pages 340-349 doi: 10.1016/J.ENG.2016.03.006

Abstract:

To date, the Three Gorges Project is the largest hydro junction in the world. It is the key project for the integrated water resource management and development of the Changjiang River. The technology of the project, with its huge scale and comprehensive benefits, is extremely complicated, and the design difficulty is greater than that of any other hydro project in the world. A series of new design theories and methods have been proposed and applied in the design and research process. Many key technological problems regarding hydraulic structures have been overcome, such as a gravity dam with multi-layer large discharge orifices, a hydropower station of giant generating units, and a giant continual multi-step ship lock with a high water head.

Keywords： orifice gravity dam Penstock on dam downstream surface Tailrace tunnel with sloping ceiling Stable arch Fullylined ship lock

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Cohesive zone model-based analyses of localized leakage of segmentally lined tunnels

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4, Pages 503-521 doi: 10.1007/s11709-023-0927-4

Abstract: This paper presents a novel approach for simulating the localized leakage behavior of segmentally lined

Keywords： segmentally lined tunnel localized leakage cohesive element hydraulic behavior numerical modeling

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Practice and Experimental Verification of TGP’s Permanent Shiplock Slope

Zhang Chaoran

Strategic Study of CAE 2001, Volume 3, Issue 5, Pages 22-27

Abstract:

The high slope for the permanent shiplock of the Three Gorges Project (TGP), excavated from the mountainSeveral aspects are described in the paper for the permanent shiplock slope including the general description

Keywords： TGP permanent shiplock high slope

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On subsurface box-shaped lined tunnel under incident SH-wave propagation

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 948-960 doi: 10.1007/s11709-021-0740-x

Abstract: element method is applied to obtain the seismic ground response, including a subsurface box-shaped lined

Keywords： box-lined tunnel half-plane BEM surface response SH-wave time-domain

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The Research on Improving the Ability to Pass Over the Three Gorges Shiplock by Optimizing Hydraulic

Cao Guangrong,Hu Ya’an and Gao Xiong

Strategic Study of CAE 2007, Volume 9, Issue 12, Pages 75-80

Abstract: of the water in Chamber 1 when No.2 chamber head is operating as the first one under the four-steps shiplockThe facts show that during the course of the Three-Gorges shiplock being fulfilled under the four-stepsshiplock operating mode, the ways transferring the ships downriver from near frusta to chamber 1 can

Keywords： Three Gorges shiplock；operating mode；water condition；passing ability

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Endochronic damage constitutive model for fully-graded aggregate mass concrete

SONG Yupu, WANG Huailiang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3, Pages 274-280 doi: 10.1007/s11709-007-0035-x

Abstract: The behavior of deformation and strength of a fully-graded aggregate concrete under complex stress stateThe proposed model is used to analyze the deformation and strength of fully-graded aggregate mass concrete

Keywords： concept surface design concern strength

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A fully solid-state cold thermal energy storage device for car seats using shape-memory alloys

Frontiers in Energy 2023, Volume 17, Issue 4, Pages 504-515 doi: 10.1007/s11708-022-0855-3

Abstract: Thermal energy storage has been a pivotal technology to fill the gap between energy demands and energy supplies. As a solid-solid phase change material, shape-memory alloys (SMAs) have the inherent advantages of leakage free, no encapsulation, negligible volume variation, as well as superior energy storage properties such as high thermal conductivity (compared with ice and paraffin) and volumetric energy density, making them excellent thermal energy storage materials. Considering these characteristics, the design of the shape-memory alloy based the cold thermal energy storage system for precooling car seat application is introduced in this paper based on the proposed shape-memory alloy-based cold thermal energy storage cycle. The simulation results show that the minimum temperature of the metal boss under the seat reaches 26.2 °C at 9.85 s, which is reduced by 9.8 °C, and the energy storage efficiency of the device is 66%. The influence of initial temperature, elastocaloric materials, and the shape-memory alloy geometry scheme on the performance of car seat cold thermal energy storage devices is also discussed. Since SMAs are both solid-state refrigerants and thermal energy storage materials, hopefully the proposed concept can promote the development of more promising shape-memory alloy-based cold and hot thermal energy storage devices.

Keywords： shape-memory alloy (SMA) elastocaloric effect (eCE) cooled seat cold thermal energy storage

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Multiobjective image recognition algorithm in the fully automatic die bonder

JIANG Kai, CHEN Hai-xia, YUAN Sen-miao

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3, Pages 313-316 doi: 10.1007/s11465-006-0026-y

Abstract: is a very important task to automatically fix the number of die in the image recognition system of a fully

Keywords： clustering different recognition algorithm Algorithm multiobjective

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Fully Self-driving Future Hits the Brakes

Chris Palmer

Engineering 2023, Volume 26, Issue 7, Pages 6-8 doi: 10.1016/j.eng.2023.05.002

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An isogeometric numerical study of partially and fully implicit schemes for transient adjoint shape sensitivity

Zhen-Pei WANG, Zhifeng XIE, Leong Hien POH

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2, Pages 279-293 doi: 10.1007/s11465-019-0575-5

Abstract: oscillation condition is much less critical than the Crank–Nicolson scheme, and the accuracy is higher than a fully

Keywords： isogeometric shape optimization design-dependent boundary condition transient heat conduction implicit time integration adjoint method

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Classification Model and Its Application of Stability of Roadway Driving Along Next Goaf for Fully-mechanized

Zhu Chuanqu,Wang Weijun,Shi Shiliang

Strategic Study of CAE 2006, Volume 8, Issue 3, Pages 35-38

Abstract:

The stability of roadway driving along next goaf for fully-mechanized caving face is syntheticallysubordination functions of the factors influencing the stability of roadway driving along next goaf for fully-mechanizedimportant part in the support design, construction and management of roadway driving along next goaf for fully-mechanized

Keywords： roadway driving along next goaf for fully-mechanized caving face stability of surrounding rock classification

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Fully automatic container terminals of Shanghai Yangshan Port phase IV

Jack Xunjie LUO

Frontiers of Engineering Management 2019, Volume 6, Issue 3, Pages 457-462 doi: 10.1007/s42524-019-0053-0

Abstract:

Engineering Owner: Construction Headquarters of Yangshan Deep-water Port Phase IV Project of Shanghai International Shipping Center

Keywords： Yangshan Port automated equipment intelligent system container terminals port engineering

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The Examination of the Technical Design of the Navigation Construction in the Three Gorges Project

Liang Yingchen

Strategic Study of CAE 2000, Volume 2, Issue 5, Pages 34-43

Abstract:

The Three Gorges Project (TGP) is the greatest water conservancy engineering being built in the world. Each of the technical design and the engineering constuction in the project can be a worldwide key technical difficult and a representative case of water conservancy engineering.

Based on the overall examination of the Three Gorges Project navigation construction technical design, which started in 1994, the following 6 topics are described and discussed： 1) the general layout of the TGP navigation construction; 2) lock´s filling and emptying system and the lock´s hydraulics; 3) the design of the high slope of the permanent ship lock; 4) the hydro-structure of the permanent ship lock; 5) shiplift; 6) scientific research and its achievement during the technical design stage.

Keywords： Three Gorges Project technical design navigation construction permanent shiplock shiplift

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Key Technical Issues of TGP Permanent Shiplock

Fan Qixiang

Strategic Study of CAE 2004, Volume 6, Issue 1, Pages 48-52

Abstract: Special requirements exist in the TGP double-lane five-step shiplock in terms of general layout of navigation

Keywords： navigation structures water-conveyance system high and steep slope hydraulics

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Maximum entropy based finite element analysis of porous media

Emad NOROUZI, Hesam MOSLEMZADEH, Soheil MOHAMMADI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 364-379 doi: 10.1007/s11709-018-0470-x

Abstract: The maximum entropy theory has been used in a wide variety of physical, mathematical and engineering applications in the past few years. However, its application in numerical methods, especially in developing new shape functions, has attracted much interest in recent years. These shape functions possess the potential for performing better than the conventional basis functions in problems with randomly generated coarse meshes. In this paper, the maximum entropy theory is adopted to spatially discretize the deformation variable of the governing coupled equations of porous media. This is in line with the well-known fact that higher-order shape functions can provide more stable solutions in porous problems. Some of the benchmark problems in deformable porous media are solved with the developed approach and the results are compared with available references.

Keywords： maximum entropy FEM fully coupled multi-phase system porous media