Full-Scale Model Experimental Study of the HDPE Multitube Saddle of an Extradosed Bridge

2022 ◽  
pp. 1-11
Author(s):  
Jie Li ◽  
Dayu Yang ◽  
Yuanhong Hu ◽  
Tengda Feng ◽  
Lizhou Xie
Keyword(s):  
Experimental Study ◽  
Full Scale ◽  
Scale Model

Experimental Study of Mechanical Pipe Snubber Seismic Behavior

1997 ◽  
Vol 119 (3) ◽  
pp. 384-388 ◽  
Author(s):  
D. K. Nims ◽  
J. M. Kelly
Keyword(s):  
Experimental Study ◽  
Dynamic Characteristics ◽  
Seismic Behavior ◽  
Full Scale ◽  
Hysteretic Behavior ◽  
Scale Model ◽  
Piping System ◽  
Complicated Pattern ◽  
Seismic Tests ◽  
Input Motion

A series of seismic tests of mechanical snubbers on a full-scale model piping system provided a unique opportunity for detailed scrutiny of snubber seismic behavior on an actual piping system. The observed snubber behavior is a complicated pattern of braking and releasing, drag and drift, and the dynamic characteristics of the snubber, as well as the input motion, play a role in the response of the snubber. The snubbers were effective in limiting pipe displacements. Relative accelerations across the snubber were larger than expected. Snubber hysteretic behavior was irregular. Results from this testing are important in understanding snubber behavior, evaluating snubber performance, and in assessing alternatives to snubbers.

scholarly journals EXPERIMENTAL STUDY ON AIR-PERMEABILITY AND CARBONATION OF FULL SCALE MODEL OF CONCRETE WALL USING VARIOUS KINDS OF BINDING MATERIAL

2017 ◽  
Vol 23 (54) ◽  
pp. 357-362
Author(s):  
Akira NONAKA ◽  
Noboru YUASA ◽  
Shuzo OTSUKA ◽  
Shota ISHIWATA ◽  
Yoshihisa NAKATA
Keyword(s):  
Experimental Study ◽  
Air Permeability ◽  
Full Scale ◽  
Scale Model ◽  
Concrete Wall ◽  
Binding Material

Effect of mesh on CFD aerodynamic performances of a container ship

2020 ◽  
Vol 20 (3) ◽  
pp. 343-353
Author(s):  
Ngo Van He ◽  
Le Thi Thai
Keyword(s):  
Water Surface ◽  
Reference Model ◽  
Full Scale ◽  
Scale Model ◽  
Container Ship ◽  
Ansys Fluent ◽  
Remarkable Effect ◽  
Aerodynamic Performances ◽  
Mesh Convergence

In this paper, a commercial CFD code, ANSYS-Fluent has been used to investigate the effect of mesh number generated in the computed domain on the CFD aerodynamic performances of a container ship. A full-scale model of the 1200TEU container ship has been chosen as a reference model in the computation. Five different mesh numbers for the same dimension domain have been used and the CFD aerodynamic performances of the above water surface hull of the ship have been shown. The obtained CFD results show a remarkable effect of mesh number on aerodynamic performances of the ship and the mesh convergence has been found. The study is an evidence to prove that the mesh number has affected the CFD results in general and the accuracy of the CFD aerodynamic performances in particular.

Full-Scale Experimental Study on the Smoke Characteristics of Train Fire Stopping at Rescue Station in Railway Tunnel

2010 ◽  
Vol 20 (3) ◽  
pp. 251-270
Author(s):  
L. F. Chen ◽  
L. H. Hu ◽  
Q. S. Wang ◽  
B. H. Liu ◽  
N. Meng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Full Scale ◽  
Railway Tunnel

Benchmarking of Truss Spar Vortex Induced Motions Derived From CFD With Experiments

2005 ◽  
Author(s):  
John Halkyard ◽  
Senu Sirnivas ◽  
Samuel Holmes ◽  
Yiannis Constantinides ◽  
Owen H. Oakley ◽  
...  
Keyword(s):  
Scale Up ◽  
Vertical Cylinder ◽  
Reynolds Numbers ◽  
Full Scale ◽  
Scale Model ◽  
Current Direction ◽  
Test Results ◽  
Helical Strakes ◽  
Truss Spar ◽  
Scale Data

Floating spar platforms are widely used in the Gulf of Mexico for oil production. The spar is a bluff, vertical cylinder which is subject to Vortex Induced Motions (VIM) when current velocities exceed a few knots. All spars to date have been constructed with helical strakes to mitigate VIM in order to reduce the loads on the risers and moorings. Model tests have indicated that the effectiveness of these strakes is influenced greatly by details of their design, by appurtenances placed on the outside of the hull and by current direction. At this time there is limited full scale data to validate the model test results and little understanding of the mechanisms at work in strake performance. The authors have been investigating the use of CFD as a means for predicting full scale VIM performance and for facilitating the design of spars for reduced VIM. This paper reports on the results of a study to benchmark the CFD results for a truss spar with a set of model experiments carried out in a towing tank. The focus is on the effect of current direction, reduced velocity and strake pitch on the VIM response. The tests were carried out on a 1:40 scale model of an actual truss spar design, and all computations were carried out at model scale. Future study will consider the effect of external appurtenances on the hull and scale-up to full scale Reynolds’ numbers on the results.

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