A Dynamic Test Procedure for Evaluation of Tripped Rollover Crashes

2002 ◽  
Author(s):  
Raymond J. Hughes ◽  
Lance K. Lewis ◽  
Barry M. Hare ◽  
Yoshiyuki Ishikawa ◽  
Kazuo Iwasaki ◽  
...  
Keyword(s):  
Test Procedure ◽  
Dynamic Test

Development of Novel Test Methodology to Understand the Mechanisms of Halite Inhibition and Environmentally Acceptable Halite Scale Inhibitors for High Temperature Application

2014 ◽  
Author(s):  
Kimberley Ho ◽  
Tao Chen ◽  
Ping Chen ◽  
Thomas Hagen ◽  
Harry Montgomerie ◽  
...  
Keyword(s):  
High Temperature ◽  
Test Procedure ◽  
Dynamic Test ◽  
Operation Time ◽  
Field Conditions ◽  
Dynamic Conditions ◽  
Test Methodology ◽  
Static Conditions ◽  
Batch Treatment ◽  
Nucleation Growth

Abstract Halite deposition is most commonly observed in gas/gas condensate fields with low water cut, high TDS produced brines and high temperature. Halite is notoriously difficult to inhibit and there are limited studies focused on halite due to it being incredibly challenging to have an effective test methodology under laboratory conditions that reflect the field conditions. The mechanisms of halite inhibition are unclear. In the published literature, static jar testing is primarily used to evaluate the performance of halite inhibitors. It is not representative of dynamic field conditions and provides limited information of halite inhibition. A new methanol driven dynamic test methodology has been developed alongside a novel jar test procedure, which together provides an effective methodology to evaluate halite inhibition under both static and dynamic conditions and provides an insight into the understanding of the mechanisms of halite inhibition. Using these novel test methodologies, four short-listed inhibitor chemistries including environmentally acceptable inhibitors were assessed and categorised into two types based on the understanding of the mechanism. ➤ Nucleation/growth inhibitors. Inhibitors reduce the nucleation/growth of halite crystals and give good performance under both static and dynamic test conditions.➤ Dispersion inhibitors. Inhibitor doesn't stop the nucleation/growth of halite crystals and gives poor performance under static conditions, but good performance under dynamic conditions due to dispersion effect. Both types of halite inhibitors have been successfully deployed in the fields through continuous injection or batch treatment. Coreflood tests were carried out to confirm the potential risk of formation damage during downhole batch treatment. Other deployment methods have been discussed such as through methanol injection line as both inhibitors are fully methanol compatible. This paper will give a comprehensive study of halite inhibition for challenged wells, including prediction, novel methodology, program of laboratory qualification, mechanism understanding and field deployment, coupled to the development of a chemical technology toolbox to design field halite applications. The value that a fuller understanding of halite control gives the industry is the ability to reduce/eliminate water wash application to control halite formation and so improve well operation time. If halite inhibition is considered at the capex phase of field development, provisions can be made for chemical injection facilities to maintain uninterrupted production.

Modal Analysis and Dynamic Test of Steel Slag Vehicle

2013 ◽  
Vol 397-400 ◽  
pp. 564-567 ◽  
Author(s):  
Kun Li Mao
Keyword(s):  
Modal Analysis ◽  
Test Procedure ◽  
Steel Slag ◽  
Dynamic Test ◽  
Dynamic Tests ◽  
Iron And Steel ◽  
Finite Element Software ◽  
Data Process ◽  
Field Dynamic ◽  
Design And Manufacture

Steel slag vehicles with tilting arm are advanced equipment used in iron and steel factory for short distance delivery. With great impact force and severe vibration when pouring steel slag, strength of equipment structure must be enough. In product design, theoretical study and simulation of steel slag vehicles were completed using commercial finite element software and dynamics software. Static strength and dynamic tests of some steel slag vehicle were finished using dynamic and static stain instruments, acceleration transducer in order to verify the computer analysis result. The modal analysis result of steel slag vehicle, the field dynamic test procedure and data process are shown in this article. In the end of paper, conclusions are drawn useful for design and manufacture of heavy-duty equipment such as steel slag vehicles.

A Dynamic-Test Procedure for Improving Seismic Qualification Guidelines

1984 ◽  
Vol 106 (2) ◽  
pp. 143-148
Author(s):  
C. W. deSilva
Keyword(s):  
Test Object ◽  
Dynamic Testing ◽  
Test Procedure ◽  
Dynamic Test ◽  
Standard Test ◽  
Modes Of Failure ◽  
Principal Axes ◽  
Black Box Testing ◽  
Three Degree Of Freedom ◽  
Available Information

Several shortcomings of available standards, regulatory guides, and review plans for seismic qualification testing are identified. A rational test nomenclature is proposed. A standard test is developed by optimizing an appropriate test severity measure function. The standard test is a rectilinear test that is equivalent to the three-degree-of-freedom test with uncorrelated excitations, recommended in IEEE-Std. 344. In terms of eigenvectors of a resulting test matrix, a dynamic interpretation is given for principal axes of a test object. The proposed approach to dynamic testing has two main advantages in comparison to the conventional approach of black-box testing. Firstly, knowledge pertaining to test-object dynamics is directly employed in its development. Secondly available information on possible modes of failure in the overall system can be conveniently incorporated into the formulation.

Dynamic Solar Domestic Hot Water Testing

1990 ◽  
Vol 112 (2) ◽  
pp. 98-101 ◽  
Author(s):  
W. Spirkl
Keyword(s):  
Test Procedure ◽  
Dynamic Test ◽  
Hot Water ◽  
Domestic Hot Water ◽  
Water Testing ◽  
Naturally Occurring ◽  
Correlation Models ◽  
Long Term Performance ◽  
Term Performance

A dynamic test procedure for SDHW systems is presented, which generalizes correlation models to the nonstationary case. It is shown that testing can be performed with an accuracy comparable to stationary models. The dynamic procedure is more flexible in testing, since any load and radiation profiles are explicitly taken into account including the ones naturally occurring. The parameters are identified using filter and least squares technique. Long-term performance is predicted with the same model used for testing. The method is applied to experimental data of four different systems.

A Comparative Study on Photovoltaic MPPT Algorithms Under EN50530 Dynamic Test Procedure

2021 ◽  
Vol 36 (4) ◽  
pp. 4153-4168
Author(s):  
Xingshuo Li ◽  
Huiqing Wen ◽  
Yihua Hu ◽  
Yang Du ◽  
Yong Yang
Keyword(s):  
Comparative Study ◽  
Test Procedure ◽  
Dynamic Test

NHTSA Passenger Car Side Impact Dynamic Test Procedure - Test-To-Test Variability Estimates

1991 ◽  
Author(s):  
R. W. Hultman ◽  
T. G. Laske ◽  
C. C. Chou ◽  
G. G. Lim ◽  
E. I. Chrobak ◽  
...  
Keyword(s):  
Test Procedure ◽  
Dynamic Test ◽  
Side Impact ◽  
Passenger Car ◽  
Test Variability
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