... strike-slip fault reservoir characterization strength pipeline burial depth ratio case study lateral displacement seabed soil trajectory canada government shear band failure mechanism lateral soil resistance plastic strain Proceedings of the Thirty-third (2023) International Ocean...

... trajectories. With different discharge velocity of the thermal jet, the trajectory centerlines experience two stages: the horizontal stage and the ascending stage. The jet has a larger horizonal distance with the higher Froude number. The temperature of jets decreases significantly after flowing into open...

... improve the detection performance of the sonar. It is therefore of great significance to study the resistance performance of appendage on research vessels and the bubble sweep-down phenomenon around research vessels. resistance ship bubble sweep-down phenomenon pressure distribution trajectory...

... increases at the same reduced velocity V r . The response frequency in the inline direction is double of that in the crossflow direction. The oscillating lift force dominates the crossflow oscillatory motion. Eight-shaped trajectories are observed the maximum displacements in the crossflow direction...

..., which improves the accuracy of ROV path tracking. To improve the trajectory tracking accuracy of ROV under external disturbance forces, Huang and Yang (2019) proposed a double-loop sliding mode control with a novel switching term, which can effectively reduce chattering. Chu et al. (2016) proposed...

... controller, let alone the influence of cable and model uncertainty. To address the above problems, especially to achieve the accurate trajectory tracking, a kind of double-loop control strategy is commonly utilized to design the motion controller. The principle of this strategy is to divide the control...

... in a straight line. Numerical simulation results preliminarily show the feasibility of the proposed methods. In addition to using fuzzy logic, Wu et al. (2021) proposed a model predictive control (MPC) method to handle dead zones and obstacles during trajectory tracking. An obstacle avoidance strategy is used...

... government efficiency pile inclination padeye inclination angle inclination efficiency resistance force sustainability phyllosilicate sub-sea system displacement trajectory suction anchor trench load angle engineering horizontal displacement analysis case clay iii soil model inclined pile...

... ABSTRACT During the installation process, drag anchors may impact or hook with subsea pipelines buried in seabed, resulting in damage to the pipelines. The inshore subsea pipeline is often protected by a rockfill protection layer, so the pull-out trajectory of drag anchors in the rockfill...

... installation, subsea pipeline will be exposed to potential damage risks. Although the current research on installation trajectory of towed anchor in seabed tends to be mature, there is still a lack of research on impact response of subsea pipeline in the process of drag anchor installation. In this paper...

... ABSTRACT For the problem of recycling AUV with manipulator, this paper starts from the aspects of kinematics modeling of manipulator, visual perception of target position, trajectory tracking control. Based on ROS to construct a simulation environment, and release visual information through...

... accurately calculate the drift trajectory of a wrecked target in the marine environment and improve the success rate of maritime search operations. The purpose of this paper is to explore the accuracy of three drift prediction models for calculating the drift trajectories of wreckage at sea, and to make...

... artificial intelligence ship motion prediction wind velocity wind angle machine learning manoeuvre performance evaluation prediction reservoir simulation motion prediction model uncertainty ship model accurate ship motion prediction zigzag surge velocity trajectory different...

... distance to the trajectory and its current speed as inputs. The reinforcement learning controller was tested in various conditions experimentally, including an indoor flume, and indoor and outdoor open tanks to perform different maneuvers, with different levels of external disturbances. robot...

... of large non-tabular icebergs. INTRODUCTION Iceberg towing is one of the technologies of safe and efficient development of offshore projects in iceberg waters that makes it possible to change the drift trajectory of icebergs in order to prevent their collision with offshore facilities. If it's...

... to the liquid at the impeller outlet. Secondly, with the increase of pump speed and particle concentration, the trend of particle movement to the blade pressure surface is more significant (Mehmet et al., 2001; Kadambi et al., 2004; Xu et al., 2017). However, this technology can not obtain the trajectory...

... cylinder drag force artificial intelligence reservoir characterization beam length displacement dynamic response non-dimensional beam length amplitude flexible filament trajectory elastic beam production control vortex interaction deformation different length mechanics lift force vortice...

... position error between the observed and hindcast drift. The model operations. Improving the accuracy of iceberg drift trajectory forecasts presented in Turnbull et al. (2015) estimated the non-tidal ocean current can help to increase ice management efficiency in terms of allocation of from the observed...

... reveal that: (1) the current was reciprocating flow along the coastline and it was very weak in JMB; (2) the wind direction had an important effect on the wind-driven residual current and the trajectory of particles; (3) the greater the wind speed is, the greater the drift distance and range...

... data in part of the South China Sea near Hainan island, anchoring points and trawling trajectories were first identified and studied with cluster analysis using DBSCAN algorithm, and then the impact frequencies were calculated. The methods proposed in this paper could provide assistance in improving...