A5042306906- Methane Hydrates and Related Phenomena
- Underwater Vehicles and Communication Systems
- Structural Integrity and Reliability Analysis
- Remote Sensing and Land Use
- Engineering Structural Analysis Methods
- Arctic and Antarctic ice dynamics
- Coastal wetland ecosystem dynamics
- Oil Spill Detection and Mitigation
- Engineering Diagnostics and Reliability
- Coastal and Marine Dynamics
- Coal Properties and Utilization
- Offshore Engineering and Technologies
- Underwater Acoustics Research
- Oil and Gas Production Techniques
- Drilling and Well Engineering
- Isotope Analysis in Ecology
- Hydrocarbon exploration and reservoir analysis
- Hydraulic and Pneumatic Systems
- Mechanical stress and fatigue analysis
- Marine Biology and Ecology Research
- Spacecraft and Cryogenic Technologies
- Non-Destructive Testing Techniques
- Marine Bivalve and Aquaculture Studies
Zhejiang Ocean University
2022-2024
Zhejiang University
2022-2024
Sanya University
2022
The deformation monitoring of terrain and shallow strata is important to the gas hydrate mining environment early warning seabed instabilities. Due complexity deep-sea difficulty operation, in-situ high-precision simultaneously are big challenges for existing observation methods. This paper describes design experimental research a system based on MEMS (Micro-electro mechanical system) sensor network (SN). SN consists horizontal array vertical containing multiple cascaded accelerometers....
Abstract An underwater manipulator is one of the most commonly used tools in offshore operations. In face unknown environment deep sea and uncertainty operation target, needs good control stability higher efficiency to prevent accidents, which puts forward requirements for manipulator. Underwater manipulators often need work under heavy loads perform tasks efficiently light loads, crucial efficient load. this paper, a algorithm based on proportion derivative feedback an all depth load...
Terrain monitoring of intertidal beach is important to the coastline evolution research. Due complexity environment and dynamics terrain changes, in situ, real-time, long-term topography are big difficulties for existing observation methods. This article describes design field experimental research a situ system based on sensor array. The has two 20-m long flexible arrays containing 42 nodes can monitor changes an area with <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Methane leakage at the interface between sediment and overlying seawater is an important basis for gas hydrate exploration. Therefore, a transfer device with working pressure of 30MPa corresponding scheme are proposed to separate water inside sampler under condition pressure-retaining. Based on relief valve adjustable threshold pressure, transfers by compressing internal volume secondary sampling. The performance studied simulation experiment. coupled Eulerian-Lagrangian approach in Abaqus,...
Abstract In this study, a sediment isobaric transfer device based on the principle of volume displacement was built, and work process explained. A physical model built in hydraulic analysis software AMESim to simulate actual working conditions. The influences pre-charge pressure accumulator, diameter, length pipeline opening safety valve fluctuation steady-time during were studied. system optimally designed results parametric analysis. sea trial verified that could with exceeding 90 MPa into...
The subsea pipeline maintenance dry cabin can effectively improve the inspection accuracy and repair quality. However, there is no reference standard for selection design of sealing strip large underwater cabin. Therefore, in this paper, characteristics seal were studied by using finite element software ABAQUS, structure non-standard designed optimized. simulation results show that D-section provide high contact stress while maintaining low Mises stress. To further performance, a new type D...
The designed structure in this study can accurately measure defects underwater oil pipelines that occur during operation. Once the approximate location of defect pipeline is confirmed, surround exposed needs repair and create a gas environment around on seabed through sophisticated sealing inflation system. Then, motors scan to reconstruct deformation surface, further developing targeted plan, which essential for extending service life pipeline. developed scheme allows measurement large...