A Plan for Developing High-Speed, Nondestructive Testing Procedures for Both Design Evaluation and Construction Inspection

2009 ◽  
Author(s):  
◽  
◽  
Keyword(s):  
Nondestructive Testing ◽  
High Speed ◽  
Design Evaluation ◽  
Testing Procedures ◽  
Construction Inspection

Heat Radiation Research and Optimized Analysis of Burner Boom on Semi-Submersible Drilling Platform

2018 ◽  
Author(s):  
Yuxin Xu ◽  
Guowei Sun ◽  
Songhua Liu ◽  
Fengguang Xue ◽  
Yong Bai
Keyword(s):  
High Speed ◽  
Oil And Gas ◽  
Heat Radiation ◽  
Well Testing ◽  
Wind Condition ◽  
Associated Gas ◽  
Testing Procedures ◽  
Water Curtain ◽  
Wind Influence ◽  
The Impact

Burner booms, one of the most important pieces of equipment for well testing procedures, are used to burn associated gas or oil-and-gas mixture. This paper first conducts a mesh sensitivity analysis to find a proper grid size. Grid independence is evaluated by the correlation value in different monitoring points. Then, the heat radiation of the burner boom on the semi-submersible drilling platform is analyzed using FDS. Without water curtain, it researches and compares the impact of low, medium and high speed wind condition on heat radiation. Without the wind influence, the simulation on heat radiation is done on the optimized water curtain design. The results show that the water curtain design can efficiently reduce the heat radiation on the platform, which has guiding significance for engineering design.

scholarly journals Ground-Based Radar Interferometry for Monitoring the Dynamic Performance of a Multitrack Steel Truss High-Speed Railway Bridge

2020 ◽  
Vol 12 (16) ◽  
pp. 2594
Author(s):  
Qihuan Huang ◽  
Yian Wang ◽  
Guido Luzi ◽  
Michele Crosetto ◽  
Oriol Monserrat ◽  
...  
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
Point Clouds ◽  
Vibration Monitoring ◽  
Dynamic Monitoring ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Testing Procedures ◽  
Microwave Radar ◽  
High Speed Trains

With the continuous expansion of the high-speed railway network in China, long-span railway bridges carrying multiple tracks demand reliable and fast testing procedures and techniques. Bridge dynamic behavior analysis is a critical process in ensuring safe operation of structures. In this study, we present some experimental results of the vibration monitoring of a four-track high-speed railway bridge with a metro–track on each side: the Nanjing–Dashengguan high-speed railway bridge (NDHRB). The results were obtained using a terrestrial microwave radar interferometer named IBIS-S. The radar measurements were interpreted with the support of lidar point clouds. The results of the bridge dynamic response under different loading conditions, including high-speed trains, metro and wind were compared with the existing bridge structure health monitoring (SHM) system, underlining the high spatial (0.5 m) and temporal resolutions (50 Hz–200 Hz) of this technique for railway bridge dynamic monitoring. The detailed results can help engineers capturing the maximum train-induced bridge displacement. The bridge was also monitored by the radar from a lateral position with respect to the bridge longitudinal direction. This allowed us to have a more exhaustive description of the bridge dynamic behavior. The different effects induced by the passage of trains through different tracks and directions were distinguished. In addition, the space deformation map of the wide bridge deck under the eccentric load of trains, especially along the lateral direction (30 m), can help evaluating the running stability of high-speed trains.

A Review of Hydrodynamic Design Methods for Seaplanes

2021 ◽  
pp. 1-22
Author(s):  
Michael G. Morabito
Keyword(s):  
Hydrodynamic Model ◽  
High Speed ◽  
Early Stage ◽  
Model Testing ◽  
Naval Academy ◽  
Testing Procedures ◽  
Testing Facility ◽  
Starting Point ◽  
Successful Series ◽  
Prediction Techniques

The design of successful water-based aircraft requires a close collaboration between the aeronautical engineers and naval architects, who perform high-speed towing tests, stability calculations, or computational fluid dynamics in support of the design. This article presents the fundamental design considerations of waterborne aircraft, which are outside of the typical educational scope of most naval architects, but which they are sometimes asked to address. These include 1) the hydrostatic and hydrodynamic problems associated with seaplane design, 2) early-stage methods for sizing the hull, 3) prediction techniques using archival data, and 4) hydrodynamic model testing procedures. Although a new design will often require substantial iteration to achieve the desired outcome, the information in this article will assist in developing a reasonable starting point for the design spiral and provides sufficient details for a hydrodynamic model testing facility to perform a successful series of model tests on the design. Although much of the work in this field dates from the 1940s, it is important to review this material in light of the current practices being used at hydrodynamic research facilities today. A detailed description of the model testing apparatus and procedure, used in a recent study at the U.S. Naval Academy, is presented to demonstrate the current applicability of these methods and some pitfalls that can be expected in testing.

The Development and Validation of a Computer Aided Method for Design Evaluation of Tracked Vehicles with Rigid Links

1994 ◽  
Vol 208 (3) ◽  
pp. 207-215 ◽  
Author(s):  
Y Gao ◽  
J Y Wong
Keyword(s):  
High Speed ◽  
New Products ◽  
Cost Effective ◽  
Design Evaluation ◽  
Tracked Vehicles ◽  
Military Vehicles ◽  
Ground Pressure ◽  
Effective Manner ◽  
Computer Aided ◽  
Basic Features

In the past decade, a computer aided method for design evaluation of high-speed tracked vehicles with flexible tracks (or tracks with relatively short track pitch commonly in use in tracked transport vehicles and military vehicles) has been developed. It has been successfully used in assisting vehicle manufacturers in the development of new products and governmental agencies in the selection of vehicle candidates. For low-speed tracked vehicles commonly in use in agriculture, construction and logging, rigid tracks with relatively long track pitch are employed to achieve a more uniform ground pressure distribution. To assist manufacturers of this type of vehicle to expedite the development of new products in a cost effective manner, a computer aided method for design evaluation of tracked vehicles with rigid links has recently been developed. It treats the track as a system of interconnected rigid links and takes into account the characteristics of the interaction between track links and deformable terrain. The basic features of the method have been verified by field test data. The method can be an extremely useful tool for the engineer to optimize vehicle design and for the procurement manager to select appropriate vehicle candidates to meet specific operating requirements.

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