A simplified method for studying cyclic creep behaviors of deep-sea manned submersible viewport windows

2021 ◽  
pp. 104565
Author(s):  
J.X. Li ◽  
P.F. Liu ◽  
X.Y. Tong
Keyword(s):  
Deep Sea ◽  
Cyclic Creep ◽  
Simplified Method ◽  
Manned Submersible

scholarly journals Experimental Research on the Process Parameters of a Novel Low-Load Drill Bit Used for 7000 m Bedrock Sampling Base on Manned Submersible

2021 ◽  
Vol 9 (6) ◽  
pp. 682
Author(s):  
Yu-Gang Ren ◽  
Lei Yang ◽  
Yan-Jun Liu ◽  
Bao-Hua Liu ◽  
Kai-Ben Yu ◽  
...  
Keyword(s):  
Deep Sea ◽  
Field Tests ◽  
Polycrystalline Diamond ◽  
Design Criterion ◽  
Penetration Length ◽  
Technical Data ◽  
Low Load ◽  
Manned Submersible ◽  
Rotary Speed ◽  
Cutting Model

Due to the need for accurate exploration of deep-sea scientific research, drilling techniques by combining the operational advantages of the Jiaolong manned submersible is considered one of the most feasible methods for deep-sea bedrock drilling. Based on deep sea bedrock cutting model and discrete element simulation, as well as efficient drilling as the design criterion, the development of a deep sea 7000 m electromechanical coring apparatus was carried out. The outstanding feature of this technology is that the bit load produced by the drill pressure is usually within the range 100–400 N while the recommended load for diamond drilling is 1–3 KN or even more. Therefore, searching for the drilling bits that can drill in extremely hard formations with minimal load and acceptable rates of penetration and rotary speed is the necessary step to prove the feasibility of electromechanical deep-sea drilling technology. A test has been designed and constructed to examine three types of drill bits. The results of experiments show that the new low-load polycrystalline diamond compact (PDC) bit has the highest penetration length of 138 mm/15 min under a 300 N load and 250 rpm rotary speed. Finally, field tests with the Jiaolong submersible were used to conduct deep sea experiments and verify the load model, which provides theoretical and technical data on the use of a low-load core sampling drill developed specifically for a deep sea submersible.

Review of Navigation and Positioning of Deep-sea Manned Submersibles

2019 ◽  
Vol 72 (04) ◽  
pp. 1021-1034 ◽  
Author(s):  
Tongwei Zhang ◽  
Jialing Tang ◽  
Shengjie Qin ◽  
Xiangxin Wang
Keyword(s):  
Future Development ◽  
Deep Sea ◽  
Underwater Vehicles ◽  
Technical Support ◽  
Development Trends ◽  
Positioning Systems ◽  
Operation Efficiency ◽  
Existing Problems ◽  
Manned Submersible ◽  
Scientific Value

Operational deep-sea manned submersibles are important underwater vehicles that provide strong technical support for international deep-sea research. Navigation and positioning technologies are expected to facilitate the complete exploitation of the scientific value of samples and data collected by such submersibles, improve their underwater operation efficiency and enhance their safety. This paper first briefly describes six operational deep-sea manned submersibles that can dive to depths of more than 4,500 m. Then, the paper focuses on the navigation and positioning technologies used in these submersibles. Finally, considering the existing problems in the navigation and positioning systems of China's manned submersible Jiaolong, the paper discusses future development trends of the navigation and positioning technologies used in operational deep-sea manned submersibles.

scholarly journals Analysis of sea condition of Jiaolong deep-sea manned submersible operating in the South China Sea

2021 ◽  
Vol 276 ◽  
pp. 01022
Author(s):  
Liu Xiaohui ◽  
Qin Shengjie ◽  
Yang Lei ◽  
Qi Haibin ◽  
Zhang Qi
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Sea ◽  
Operating Time ◽  
Scientific Investigation ◽  
The South China Sea ◽  
Design Parameters ◽  
The South ◽  
China Sea ◽  
Manned Submersible

The South China Sea is the sea area with the largest area, the largest depth, the most abundant oil and gas resources and the most comprehensive biological species in China. The further exploration of the South China Sea with manned submersible and other major deep-sea equipment is of great significance to China's deep-sea scientific investigation. In this paper, Jiaolong manned submersible was taken as an example. In order to explore the operation window to guarantee the operation safety of manned submersible and improve the efficiency of voyage scientific investigation, this paper combined the global wave return data and the wave data based on satellite remote sensing to focus on the Marine environment characteristics in the South China Sea. According to the operational design parameters of Jiaolong, in the South China Sea, the most appropriate operating time window is from April to September, and the rest of the time, proper sea conditions should be selected for the operation.

Working Tools Study for JiaoLong Manned Submersible

2019 ◽  
Vol 53 (2) ◽  
pp. 56-64
Author(s):  
Xianpeng Shi ◽  
Yugang Ren ◽  
Jialing Tang ◽  
Wentao Fu ◽  
Baohua Liu
Keyword(s):  
Deep Sea ◽  
High Efficiency ◽  
Deep Ocean ◽  
Basic Research ◽  
Extreme Environment ◽  
The Past ◽  
Wide Range ◽  
Manned Submersible ◽  
Observation Function ◽  
Scientific Questions

AbstractThe remarkable progress in deep submergence science with manned submersibles in the past 50 years has made it possible for us to directly explore the inaccessible underwater extreme environment. Basic research carried out at depths over 1,000 m in the deep ocean has provided dramatic and unique insights into some of the most compelling scientific questions ever posed. Deep research manned submersibles have been widely recognized as indispensable platforms for conducting deep-sea research. Whereas all deep-sea submersibles share the unique feature of direct observation function by scientists and pilots from the cabin, all manned submersibles are equipped with different tools to implement a wide range of jobs in different exploration purposes. These can directly affect productivity and each dive's outcomes, such that it would be meaningful to study the samplers, sensors, and other devices that have been installed on the different deep-sea research manned submersibles around the world. This article will also introduce the research and development status of the JiaoLong manned submersible's operational tools, which have been researched and tested during the sea trials and test operational phase over the past 9 years. Based on developed technologies, state-of-the-art tools are essential to achieve a high-efficiency use for each dive. The article brings forward discussion and suggestions for the development of JiaoLong's operational tools, followed by a conclusion from the perspective of JiaoLong's operation team.

Human reliability prediction in deep-sea sampling process of the manned submersible

2019 ◽  
Vol 112 ◽  
pp. 1-8 ◽  
Author(s):  
Dengkai Chen ◽  
Yu Fan ◽  
Wenhua Li ◽  
Yahui Wang ◽  
Shuai Zhang
Keyword(s):  
Deep Sea ◽  
Reliability Prediction ◽  
Human Reliability ◽  
Sampling Process ◽  
Manned Submersible

scholarly journals Positioning Systems for Jiaolong Deep-Sea Manned Submersible: Sea Trial and Application

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 71644-71650 ◽  
Author(s):  
Tongwei Zhang ◽  
Baohua Liu ◽  
Yeyao Liu
Keyword(s):  
Deep Sea ◽  
Positioning Systems ◽  
Sea Trial ◽  
Manned Submersible

scholarly journals A New Method for Optimizing the Cabin Layout of Manned Submersibles

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Wenzhong Wang ◽  
Shusheng Zhang ◽  
Cong Ye ◽  
Dengkai Chen ◽  
Hao Fan
Keyword(s):  
Deep Sea ◽  
New Method ◽  
Human Factors Engineering ◽  
Cultural Perspective ◽  
Complex Environment ◽  
Human Reliability ◽  
Small Space ◽  
Important Method ◽  
Multiobjective Genetic Algorithm ◽  
Manned Submersible

In order to reduce the misoperation of submersible pilots in the complex environment of deep sea and improve human reliability, it is a very important method to optimize the cabin space of manned submersible. In this paper, manned submersible Jiaolong is taken as an example to describe the breakthrough of traditional modes for optimizing the cabin layout of manned submersible with an aesthetic perspective of deconstruction and reconstruction thinking; the layout is optimized based on deconstruction and reconstruction from the cultural perspective of interdisciplinary. The experimental results show that the layout of manned submersible cabin is optimized by combining the theory of deconstruction and reconstruction aesthetics and human factors engineering, and the feasibility and effectiveness of this method are verified by multiobjective genetic algorithm. Deconstruction and reconfiguration layout optimization improves the human reliability of divers. It is a new method for the optimization of manned submersible cabin layout and also provides a reference for studies on the layout of similar small space.

Numerical and experimental study on the safety of viewport window in a deep sea manned submersible

2019 ◽  
Vol 15 (7) ◽  
pp. 769-779 ◽  
Author(s):  
S. B. Pranesh ◽  
Deepak Kumar ◽  
V. Anantha Subramanian ◽  
D. Sathianarayanan ◽  
G. A. Ramadass
Keyword(s):  
Experimental Study ◽  
Deep Sea ◽  
Manned Submersible

Development of the Jiaolong Deep Manned Submersible

2013 ◽  
Vol 47 (3) ◽  
pp. 37-54 ◽  
Author(s):  
Weicheng Cui
Keyword(s):  
Future Development ◽  
Deep Sea ◽  
Development Process ◽  
Mineral Resources ◽  
Open Water ◽  
Point Of View ◽  
Water Tank ◽  
Exploration And Exploitation ◽  
Manned Submersible ◽  
Tank Test

AbstractDeep sea exploration and exploitation are of increasing interest to 21st century scientists, and both manned and unmanned deep submergence vehicles are necessary means for deep sea exploration. To fulfill the requirements of deep sea exploration for China Ocean Mineral Resources R&D Association (COMRA), a deep manned submersible was in the process of development in China from 2002 to 2012 and was named Jiaolong in 2010. The purpose of this paper is to introduce the development process from a historical point of view, including the design, realization of components, assembly, open-water tank test, and sea trials of the Jiaolong deep manned submersible. The technical difficulties encountered at each stage, and their solutions are briefly described. The future development trends for deep manned submersibles are pointed out.

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