Verification of a hybrid model test method for a deep water floating system with large truncation factor

2014 ◽  
Vol 92 ◽  
pp. 245-254 ◽  
Author(s):  
Chunyan Ji ◽  
Sheng Xu
Keyword(s):  
Hybrid Model ◽  
Model Test ◽  
Deep Water ◽  
Test Method ◽  
Floating System

The Model Test of Deep Water S-Lay Stinger Using Dynamical Substructure Method

2015 ◽  
Vol 137 (1) ◽  
Author(s):  
Xiangfeng Zhang ◽  
Qianjin Yue ◽  
Wenshou Zhang
Keyword(s):  
Model Test ◽  
Deep Water ◽  
Large Scale ◽  
Test Method ◽  
Scale Model ◽  
Length Scale ◽  
Model Structure ◽  
Large Scale Model ◽  
Test Platform ◽  
Water Pipeline

Deep water pipeline installations by S-lay present many challenges, especially in the overbend section. The S-lay requires a long curved and stiff stinger to support the pipeline weight. The interaction between the overbend pipe and stinger is complicated such that the numerical structure analysis could not sufficiently predict the mechanical behavior of the installing process. A dynamic substructure model test method with 1:20 length scale for 2000 m water depth is addressed in this paper, where the large scale model structure can be tested to simulate the vessel movements during installation. The roller forces influenced by the stinger stiffness and vessel movements are discussed based on the test platform.

Research on Diffusion Effect of Sewage Marine Discharge from Different Angles

2014 ◽  
Vol 675-677 ◽  
pp. 551-555
Author(s):  
Hang Yu
Keyword(s):  
Phase Ii ◽  
Marine Environment ◽  
Model Test ◽  
Deep Water ◽  
Large Angle ◽  
Premature Convergence ◽  
Design Parameters ◽  
Diffusion Effect ◽  
Environmental Material ◽  
Port Engineering

The sewage diffusion is an environmental material for protecting marine environment. It plays an important role in port engineering. Its effect under deep water was carried out between different diffuser design parameters based on the hydraulic model test, and YangKou port sewage marine disposal project phase II was taken as an example. For this project, jet angle was controlled to be 0 degree, and horizontal angle was controlled to be 0 degree. It not only can ensure that sewage fully diluted mixed, also can avoid the premature convergence and sewage lifting. It is feasible for selecting large angle nozzle under deep water and there are some technical bases have been provided for other sewage marine disposal project.

scholarly journals REGRESI LINEAR BIVARIAT SIMPEL DAN APLIKASINYA PADA DATA CUACA DI CILACAP

2014 ◽  
Vol 6 (1) ◽  
pp. 45 ◽  
Author(s):  
Saniyah Saniyah ◽  
Budi Pratikno
Keyword(s):  
Linear Regression ◽  
Regression Model ◽  
Air Temperature ◽  
Model Test ◽  
Predictor Variable ◽  
Error Model ◽  
Test Method ◽  
Weather Data ◽  
Mean Deviation ◽  
Response Variables

This study discusses the simple bivariate linear regression on weather data in Cilacap district. This simple bivariate linear regression using the two response variables, rainfall () and humidity of an area (), and one predictor variable, the air temperature (). Regression model test method is a Wilk's Lamda test, the value of Wilk's Lamda = 0.881101 less than lambda table 0.903. The results show that the model and the both parameters are significant, with mean deviation error model is .

Model Test for Crane Installation of Subsea Equipment in Deep Water

2016 ◽  
Author(s):  
B. W. Nam ◽  
N. W. Kim ◽  
S. Y. Hong ◽  
Y. M. Choi ◽  
J. W. Kim
Keyword(s):  
Model Test ◽  
Deep Water

Research of Sewage Marine Discharge Diffusion Effect under Deep Water

2013 ◽  
Vol 726-731 ◽  
pp. 1027-1031
Author(s):  
Hang Yu ◽  
Jing Feng Bai ◽  
Xin Hai Wang ◽  
Hong Xin Zhao
Keyword(s):  
Model Test ◽  
Deep Water ◽  
Near Field ◽  
Large Angle ◽  
Hydraulic Model ◽  
Experimental Results ◽  
Premature Convergence ◽  
Design Parameters ◽  
Diffusion Effect ◽  
Horizontal Angle

The sewage diffusion effect under deep water was carried out between different diffuser design parameters based on the hydraulic model test, and Huizhou Dayawan sewage marine disposal project was taken as an example. The experimental results show that the design parameters are significant for sewage diffusion at the near field. For Dayawan project, jet angle was controlled to be 20 degree, and horizontal angle was controlled to be 90 degree. It not only can ensure that sewage fully diluted mixed, also can avoid the premature convergence and sewage lifting. It is feasible for selecting large angle nozzle under deep water and there are some technical bases have been provided for other sewage marine disposal project.

A new moving model test method for the measurement of aerodynamic drag coefficient of high-speed trains based on machine vision

2017 ◽  
Vol 232 (5) ◽  
pp. 1425-1436 ◽  
Author(s):  
Zhiwei Li ◽  
Mingzhi Yang ◽  
Sha Huang ◽  
Dan Zhou
Keyword(s):  
Machine Vision ◽  
Drag Coefficient ◽  
Model Test ◽  
High Speed ◽  
Aerodynamic Drag ◽  
Full Scale ◽  
Test Method ◽  
Test Accuracy ◽  
Friction Resistance ◽  
Aerodynamic Drag Coefficient

A moving model test method has been proposed to measure the aerodynamic drag coefficient of a high-speed train based on machine vision technology. The total resistance can be expressed as the track friction resistance and the aerodynamic drag according to Davis equation. Cameras are set on one side of the track to capture the pictures of the train, from which the line marks on the side surface of the train are extracted and analyzed to calculate the speed and acceleration of the train. According to Newton’s second law, the aerodynamic drag coefficient can be resolved through multiple tests at different train speeds. Comparisons are carried out with the full-scale coasting test, wind tunnel test, and numerical simulation; good agreement is obtained between the moving model test and the full-scale field coasting test with difference within 1.51%, which verifies that the method proposed in this paper is feasible and reliable. This method can accurately simulate the relative movement between the train, air, and ground. The non-contact measurement characteristic will increase the test accuracy, providing a new experimental method for the aerodynamic measurement.

Anchor Deployment Planning Using Simulated Annealing

2002 ◽  
Author(s):  
Oscar Brito Augusto
Keyword(s):  
Simulated Annealing ◽  
Objective Function ◽  
Deep Water ◽  
Simulated Annealing Algorithm ◽  
Production Systems ◽  
Offshore Platforms ◽  
Additional Advantage ◽  
Floating System ◽  
Deployment Planning ◽  
Planning Methodology

In this work a planning methodology for deep-water anchor deployment of anchor lines for offshore platforms and floating production systems aiming at operational resources optimization is explored, by minimizing a multi criteria objective function. A Simulated Annealing Algorithm was used to optimize the objective function. As an additional advantage, inherited from the proposed methodology, the planning automation is achieved. Planning automation overcomes the traditional way based on trial error exercise, where an engineer using an anchoring application, decides how much of work wire and anchoring line must be paid out from both the floating system and the supply boat and additionally which horizontal force must be applied to the line trying settle the anchor on a previously defined target in the ocean floor. Some cases, from anchor deployment of some MODUs operating in deep-water oil fields in Brazil, are shown demonstrating some potentialities of the proposed model.

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