scholarly journals 1st Report on the Basic Performance Verification by the Actual Sea Model Tests for the Higher Holding Performance New Type Anchor Development

2021 ◽  
Vol 144 (0) ◽  
pp. 42-49
Author(s):  
Mitsuhiro MASUDA ◽  
Kiyokazu MINAMI
Keyword(s):  
Model Tests ◽  
Performance Verification ◽  
Basic Performance ◽  
New Type

Basic Performance Verification of Base Isolation Device using Air Floating technique

2020 ◽  
Vol 2020 (0) ◽  
pp. S10115
Author(s):  
Go NAKAMURA ◽  
Osamu FURUYA ◽  
Hiroshi KURABAYASHI ◽  
Kunio SANPEI ◽  
Koji YAMAZAKI
Keyword(s):  
Base Isolation ◽  
Performance Verification ◽  
Basic Performance ◽  
Isolation Device

Numerical and Experimental Investigation on Hydrodynamic Characteristics of FLNG With an Account of the Inner-Tank Sloshing

2011 ◽  
Author(s):  
Wenhua Zhao ◽  
Jianmin Yang ◽  
Zhiqiang Hu ◽  
Tao Peng
Keyword(s):  
Numerical Simulations ◽  
Model Tests ◽  
Hydrodynamic Performance ◽  
Hydrodynamic Characteristics ◽  
Fast Fourier Transformation ◽  
Motion Responses ◽  
Comparison Results ◽  
New Type ◽  
Lng Liquefaction ◽  
Tank Sloshing

FLNG is a new type of floating LNG platform which is ship-shaped FPSO hull equipped with LNG storage tanks and liquefaction plants and has been developed as an alternative to long pipelines to LNG liquefaction plant on land for stranded offshore fields. Different to the conventional FPSO, the hydrodynamic performance of the being-proposed FLNG can be significantly affected by the inner-tank liquid sloshing, due to the fact that LNG performs better liquidity than crude oil. In order to investigate the hydrodynamic characteristics of FLNG with large hull and high center of gravity, a series of numerical simulations on an FLNG designed by CNOOC and MARIC were conducted with the help of the well-known code WADAM. In addition, corresponding model tests on the same vessel with solid ballast were completed, serving as a verification of the numerical simulations. In order to inspect the sloshing effects of inner tanks on the global motion responses of the FLNG vessel, model tests with liquid ballast were also conducted. Comparisons were made between numerical and experimental results with methods of Fast Fourier Transformation technology and spectral analysis. The numerical simulation results were in good accordance with those of the model tests, which proves the feasibility of the numerical simulations. Furthermore, the effects of the inner tank sloshing on the FLNG hydrodynamic characteristics were summed up. Conclusions obtained from the comparison results would be of significant importance for the design of the FLNG system.

Study on a New Type of Analogue Material for Geotechnical Tests and its Applications

2008 ◽  
Vol 33-37 ◽  
pp. 693-698
Author(s):  
Yong Li ◽  
Xiao Jing Li ◽  
Wei Shen Zhu ◽  
Qiang Yong Zhang
Keyword(s):  
Model Test ◽  
Alcoholic Solution ◽  
Model Tests ◽  
Mixture Ratio ◽  
Iron Mineral ◽  
Underground Openings ◽  
Uniaxial Compressive Test ◽  
New Type ◽  
Geotechnical Tests ◽  
Geotechnical Model

This paper introduces many types of analogue materials in China and other countries in geotechnical model tests. Combined with the study on a few geo-mechanical model tests of significant tunnels and underground openings in Chinese western areas, this paper recommends a new type of analogue material, which is made from iron mineral powder, barite powder, quartz powder and alcoholic solution with rosin. In order to know the physico-mechanical characteristics of this composite material with different mixture ratios, we use specimens to do lots of mechanical experiments such as uniaxial compressive test, quasi-triaxial shear test, triaxial test and Brazilian test. Consequently, the analogue materials with different mixture ratios can be used to physically model different projects, and this analogue material with a certain mixture ratio has been successfully used in the model test of a branching-out tunnel. The results of the model test verify that this new analogue material can be successfully used in all kinds of geotechnical model tests.

scholarly journals SHAKING TABLE MODEL TESTS ON REINFORCE SOIL RETAINING WALL WITH A NEW-TYPE OF GEOCELL AND GEOGRIDS EMBEDDED IN SANDY AND GRAVELLY BACKFILLS

2015 ◽  
Vol 30 (0) ◽  
pp. 23-30
Author(s):  
Tomoharu MERA ◽  
Takashi KIYOTA ◽  
Xinye HAN ◽  
Toshihiko KATAGIRI ◽  
Christian HAUSSNER ◽  
...  
Keyword(s):  
Retaining Wall ◽  
Model Tests ◽  
Shaking Table ◽  
Table Model ◽  
New Type

Hydrodynamic Characteristics in Ecological Arc-Shaped Baffle Fishway

2012 ◽  
Vol 212-213 ◽  
pp. 1119-1122 ◽  
Author(s):  
Fei Yu ◽  
Jia Yuan Wang ◽  
Li Quan Xie
Keyword(s):  
Water Flow ◽  
Model Tests ◽  
Experimental Results ◽  
Hydraulic Structures ◽  
Hydrodynamic Characteristics ◽  
Upstream Migration ◽  
Migratory Fish ◽  
Influence Of Water ◽  
New Type ◽  
Main Components

Fishways are hydraulic structures allowing fishes upstream migration through engineering constructions in the rivers. The Denil type has a wide application and the main components are flat baffles. In this paper, we present a new type of baffle (arc-shaped baffle) to ameliorate the hydrodynamic characteristics in the fishway. The main improvement of arc-shaped baffle fishway is the alteration that the flat baffles are replaced by arc-baffles. In order to investigate the influence of water flow on migratory fish in the arc-baffle fishway, model tests were conducted. Based on the experimental results, the conclusion can be reached that hydrodynamic characteristics in arc-shaped baffle fishways are steadier than that in traditional Denil fishways, which makes fishes ascend easily.

scholarly journals Model Tests on Y-Shaped Piles under Compressive and Lateral Loading in Saturated Sand

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Lian-wei Ren ◽  
Quan-wei Yang ◽  
Gang-qiang Kong ◽  
Zhi-lin Dun ◽  
Xin-yu Wang
Keyword(s):  
Bearing Capacity ◽  
Ground Improvement ◽  
Coastal Region ◽  
Bending Moment ◽  
Model Tests ◽  
Saturated Sand ◽  
Soil Pressure ◽  
Cross Sectional ◽  
Side Resistance ◽  
New Type

Y-shaped piles are a new type of pile whose cross-section is like the letter Y: they are often used in ground improvement for road or train subgrades in the eastern coastal region of China. To investigate the bearing behaviour of Y-shaped piles in saturated sand, a series of model tests under compressive and horizontal load for Y-shaped piles, C 1 circular pile (the same cross-sectional area of Y-shaped pile), and C 2 circular pile (the same perimeter of Y-shaped pile) were carried out. Comparative analysis was conducted on bearing capacity, axial force and side resistance distribution, load sharing ratio, bending moment, and lateral soil pressure distribution along the embedded length. The results show that the bearing capacity of a Y-shaped pile does not increase in proportion, and the shaft resistance is weakened to some extent in saturated sand; Y-shaped pile can effectively improve the compressive bearing capacity for the same amount of concrete. The lateral bearing capacity of a Y-shaped pile has directionality, and hanging a circular section into a Y-shaped section may improve the horizontal bearing capacity for the same amount concrete, but cannot give full play to the advantage of the larger side area for horizontal bearing capacity in saturated sand.

411 Verification of Basic Performance of New-Type In-Wheel Motor System

2010 ◽  
Vol 2010.47 (0) ◽  
pp. 143-144
Author(s):  
Tatsuhiro NISHIKAWA ◽  
Masaki UCHIDA ◽  
Yoshifumi MORITA
Keyword(s):  
Motor System ◽  
Basic Performance ◽  
New Type

An Experimental Comparison of Horizontal Resistance of Single Suction Pile and Group Suction Piles

2018 ◽  
Author(s):  
Juhyung Lee ◽  
Hakman Kim ◽  
Jinwoo Cho
Keyword(s):  
Model Tests ◽  
Scale Model ◽  
Experimental Comparison ◽  
Small Scale ◽  
Horizontal Resistance ◽  
Floating Structures ◽  
Pile Spacing ◽  
Pile Diameter ◽  
New Type ◽  
Group Pile

In this study, a new type of suction pile foundation for floating structures, namely group suction piles, was proposed to improve the shortcomings of conventional single suction piles. Small-scale model tests were performed to estimate the horizontal behavior of single suction piles and group suction piles with different pile spacing (2, 3 and 4 times the pile diameter). The horizontal behavior of group suction piles with different pile spacing was analyzed for various loading locations based on the model tests. For the given group pile configurations (a group pile having 9 component piles with a pile formation of 3 × 3), the horizontal resistance increased with increasing pile spacing. The maximum ultimate horizontal resistances were found at the loading locations of 50% of the embedded depth. Unlikely in the single suction pile case, the significantly maintained residual resistances were found for group suction piles. The residual resistances of group suction piles were at least higher than 40% of the corresponding ultimate horizontal resistances.

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