... ABSTRACT Significant sway phenomena exist during the dredging operation of trailing suction hopper dredger, which greatly affect the accuracy of vessel dynamic positioning and dredging operation safety. In order to accurately predict the motion response of vessels under various operating...

... ABSTRACT The trailing suction hopper dredger(TSHDs) has a typical working condition of opening the bottom mud door for throwing mud in dredging operation. During such mud discharge operations, the vessel's movement and the reflection of waves on the mud chamber walls can result in a complex...

... pulley algorithm hoist pulley automatic control system artificial intelligence deviation hoist winch equation subroutine winch closing pulley grab dredger design operation dredger closing winch accuracy correlation ABSTRACT This article addresses the issues...

... of trailing suction dredger bow spray. INTRODUCTION At present, with the gradual improvement of environmental protection and engineering design requirements, higher requirements are put forward for the fine construction technology such as underwater flatness or hydraulic fill of dredging ship sediment...

... dislocation distance relative difference drag head water pipe inlet jet water pipe inlet dredger upstream oil & gas rubber wrist fail equivalent diameter hopper dredger suction vacuum jet water pump drag head inlet decrease ABSTRACT In order to ensure that the dredging...

... ABSTRACT Aiming at the impeller of trailing suction dredger, on the premise of the same impeller dimensions, three kinds of twisted blades with inlet edge shape were designed. The model pump was made according to the proportion of 1:2. The external characteristics and cavitation performance...

... ABSTRACT As the main construction vessel of dredging project, the TSHD (trailing suction hopper dredger) has low efficiency when dredging hard soil. It is because that the cutting depth of the draghead is limited, the concentration of suction slurry is low. Therefore, researchers propose a new...

... ABSTRACT It is an important prerequisite for high performance of the whole dredger to maintain safe and effective operation of the conveying system during dredging process. Due to the complex operation processes, current monitoring and adjustment operations of the conveying system are mostly...

... ABSTRACT The overflow duct is a key part of a trailing suction hopper dredger, which is directly related to the loading efficiency and overflow loss. However, the design of the overflow duct usually refers to the previous design drawings and lacks of guiding theories. This paper takes...

... ABSTRACT In order to study the dynamic response characteristics of the trailing suction dredger under medium-long period wave conditions, the response characteristics of the trailing suction dredger under selfpropelled and non-self-propelled conditions in 12s period are calculated by using...

... ABSTRACT As a premise research, performance and optimization strategy for conveying system of hydraulic dredgers is studied. Calculation method of conveying system performance is formed by combing pump performance and pipeline resistance formulas according to available researches...

... ABSTRACT In this paper, the noise predictions on board ro-ro passenger ship and self-propelled cutter suction dredger are performed, by means of the general noise assessment software Designer-NOISE which is based on the hybrid Statistical Energy Analysis. All typical noise sources in ships...

... dredger. Because the draghead fixed high pressure nozzle will increase the initial cutting depth. When the draghead move forward, the high pressure flush with teeth cut hard soil more quickly and effectively, thus improving the cutting efficiency of hard soil. INTRODUCTION High pressure water jet...

... ABSTRACT The three dimensional multiphase flow CFD method was used to simulate the spatial movement trajectory and the ground distribution characteristics of bow-spray for Trailing Suction Hopper Dredger (TSHD). The numerical simulation results are agreeing with the date form construction site...

... Abstract Longitudinal wave load is the dominant factor of spud breaking for large cutter suction dredger operating in waves, especially in a swell. Considering the interaction of spud, hull and ladder, a hydrodynamic model of the large self-propelled cutter suction dredger "TIAN JING" is built...

... that contains dioxin. But, the research on sediment release from dredgers in recent years is paucity in Japan. Many of researches in recent years are the monitoring techniques of the turbidity and the researches on the diffusion forecast. The research that decreased the generation of the turbidity...

... the Baydaratskaya Bay of 8 gas lines 1220 mm dia with internal pressure of 7.4 MPa. Underwater trench of 70 km is to be made along the pipeline route with the use of special machinery. Rotary dredgers will be used on the offshore section. Deep water section will be excavated by suction-tube hoppers. Gas pipeline...