Specification for temporary access platforms. Performance and design requirements, and test methods

2015 ◽  
Keyword(s):  
Test Methods ◽  
Design Requirements

Experimental Study on Coal Entry with Water Trickling and Burst Cracked Roof Supported by Anchor Net

2013 ◽  
Vol 690-693 ◽  
pp. 3493-3497
Author(s):  
Chang Qing Ma ◽  
Bao Qing Dai ◽  
Guang Peng Qin ◽  
Bin Xu
Keyword(s):  
Field Tests ◽  
Field Research ◽  
Test Methods ◽  
Design Parameters ◽  
Pressure Monitoring ◽  
Coal Roadway ◽  
Working Face ◽  
Data Field ◽  
Beam Type ◽  
Design Requirements

There are large amount of roof water spray in 10# coal seam working face in Tuan Bai coal mine, and the immediate roof with bedding and fractures was fractured. There are also many fallen columns, roof integrity was affected. Varying degrees of damage appeared by adopting traditional I-beam type passive support, when encountered fault, collapse columns and other complex tectonic areas, it prone to collapse accidents. This paper analyses the adaptability of anchor net support, based on the characteristics of coal roadway with water trickling and burst cracked roof, combined field research, coal and rock sampling and underground measures and test methods; by the application of waterproof anchoring agent, making the bolt, the anchorage force meet the design requirements, and ultimately determine the design parameters. Field trails in the headentry, and by analyzing the rock pressure monitoring data, field tests showed that the effect of supporting is good.

Lightweight Design of PLATE ShearS Bed Based on Topology Optimization and Test Methods

2013 ◽  
Vol 568 ◽  
pp. 143-149
Author(s):  
Yong Wang ◽  
Kun Li ◽  
Bao Ping Cui ◽  
Zu Fang Zhang
Keyword(s):  
Topology Optimization ◽  
Lightweight Design ◽  
Optimization Method ◽  
Maximum Principal Stress ◽  
Test Methods ◽  
Total Displacement ◽  
Design Requirements ◽  
Improvement Scheme ◽  
Different Thickness ◽  
Topology Optimization Method

In order to meet the lightweight design requirements of one swing-type plate shears, the topology optimization method is applied to improve the structure of bed. According to the analysis of the actual working conditions, the reasonable load and boundary conditions are determined. The conceptual model of bed structure is established by using topology optimization method. Lightweight improvement scheme is proposed based on the topology optimization results, and the rationality of scheme is verified by test and analysis. Different parts of the bed are thickened or thinned, and the influences of different thickness of the stiffener on the maximum principal stress, total displacement, displacement in Y direction and weight of bed structure model are analyzed. A reasonable lightweight scheme of shear machine bed is proposed. The weight of the bed is reduced and the lightweight purpose is finally achieved in the case of meeting the requirements of shearing accuracy.

Experimental Study on Atomization Characteristic of Fuel Injector of Heavy-Duty Gas Turbine

2011 ◽  
Vol 354-355 ◽  
pp. 488-491
Author(s):  
Kai Liu ◽  
Bao Cheng Zhang ◽  
Hong An Ma
Keyword(s):  
Experimental Data ◽  
Gas Turbine ◽  
Test Methods ◽  
Spray Angle ◽  
Fuel Injector ◽  
Heavy Duty ◽  
Group Design ◽  
Design Requirements ◽  
Heavy Duty Gas Turbine ◽  
Reliable Basis

Experimental investigation results of the fuel injector group in a heavy-duty gas turbine are presented. Atomization characteristic has great impact about combustion, inflame, temperature field of outlet. Obtained atomization characteristic about spray particle size and spray angle using LDV/PDPA system, determined dimension of injector group. On the basis of these tests, the combustion testing of the injector group in the flame tube is made, its every targets are arrived in the design requirements. This has demonstrated: the test systems and test methods are practical, feasible and reliable. These experimental data have provided the reliable basis for the injector group design and development.

Experimental Study of Atomization Characteristic of Air Blast Atomizer

2013 ◽  
Vol 300-301 ◽  
pp. 185-188 ◽  
Author(s):  
Kai Liu ◽  
Li Yan Sun
Keyword(s):  
Experimental Data ◽  
Test Methods ◽  
Spray Angle ◽  
Fuel Injector ◽  
Heavy Duty ◽  
Air Blast ◽  
Group Design ◽  
Design Requirements ◽  
Heavy Duty Gas Turbine ◽  
Reliable Basis

Experimental investigation results of the fuel injector group in a heavy-duty gas turbine are presented. Atomization characteristic has great impact about combustion, inflame, temperature field of outlet. Obtained atomization characteristic about spray particle size and spray angle using LDV/PDPA system, determined dimension of injector group. On the basis of these tests, the combustion testing of the injector group in the flame tube is made, its every targets are arrived in the design requirements. This has demonstrated: the test systems and test methods are practical, feasible and reliable. These experimental data have provided the reliable basis for the injector group design and development.

Landing Gear Design and Development

1989 ◽  
Vol 203 (1) ◽  
pp. 67-73 ◽  
Author(s):  
S F N Jenkins
Keyword(s):  
Stress Analysis ◽  
Fatigue Testing ◽  
Test Methods ◽  
Landing Gear ◽  
Design And Development ◽  
Gear Design ◽  
Shock Absorbers ◽  
Design Requirements

This paper discusses design requirements and the compatability of shock absorbers to satisfy the performance required. The effect on landing gear design of trends to use the latest materials, particularly ultra-high-tensile steels, also test methods to confirm stress analysis calculations and flight-by-flight fatigue testing.

The Choice of Test Methods in Site Investigations

1986 ◽  
Vol 2 (1) ◽  
pp. 289-297 ◽  
Author(s):  
A. Marsland
Keyword(s):  
Laboratory Tests ◽  
Test Methods ◽  
Careful Consideration ◽  
Engineering Properties ◽  
Soil Parameters ◽  
Test Procedures ◽  
Site Investigations ◽  
Soil Fabric ◽  
Design Requirements

AbstractThe appropriate choice of sampling methods, laboratory tests and in situ tests depends upon the type of structure or earthwork being considered, the nature of the ground influenced by the construction and the required accuracy of the prediction. To obtain optimum results requires considerable experience of the design requirements and potential construction problems as well as the test methods and their range of application. Some methods are particularly useful for obtaining continuous profiles and giving a rough indication of the engineering properties while others are designed to provide more basic soil parameters. The results obtained may be sensitive to changes in equipment details, test procedures and methods of interpretation.When empirical relationships are invoked, care is necessary to ensure that identical equipment and procedures have been used and that the correlations have been obtained in similar soils. The degree to which the volumes of soil tested are representative of the soil in the mass is important. Factors such as the orientation of the maximum stresses applied during the tests relative to the directions of the macro fabric features, the degree of stress anisotropy, the directions of the stresses applied to the structure and the effects of disturbance during sampling and insertion of in situ devices need careful consideration.Test data from the most appropriate in situ and laboratory tests should be integrated with soil fabric studies in order to produce the best overall assessments.

Laboratory proficiency in susceptibility testing of Helicobacter pylori using agar dilution and E test methods

2001 ◽  
Vol 120 (5) ◽  
pp. A586-A587
Author(s):  
L BEST ◽  
S JO ◽  
V VANZANTEN ◽  
D HALDANE ◽  
V LOO ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Susceptibility Testing ◽  
Test Methods ◽  
Agar Dilution

Collaborative Airport Traffic System (CATS) to Evaluate Design Requirements for an Airport Surface Departure Management System

2011 ◽  
Author(s):  
Alicia B. Fernandes ◽  
Philip J. Smith ◽  
Amy Spencer ◽  
Eric Wiley ◽  
Dustin Johnson
Keyword(s):  
Management System ◽  
Traffic System ◽  
Design Requirements

Scientific and Standardization Committee Communications Comparison of Test Methods for the Lupus Anticoagulant: International Survey on Lupus Anticoagulants-I (ISLA-1)

1990 ◽  
Vol 64 (03) ◽  
pp. 478-484 ◽  
Author(s):  
Thomas Exner ◽  
Douglas A Triplett ◽  
David A Taberner ◽  
Margaret A Howard ◽  
E Nigel Harris
Keyword(s):  
Lupus Anticoagulant ◽  
Test Methods ◽  
Positive Sample ◽  
Direct Proportion ◽  
Clotting Time ◽  
Preliminary Screening ◽  
Activated Platelets ◽  
Tissue Thromboplastin ◽  
Kaolin Clotting Time ◽  
Induced Defects

SummarySix lyophilized plasma samples were sent to 20 “expert” laboratories for assessment of lupus anticoagulant (LA). Four samples contained pooled LA of graded potency mixed with aged normal plasma. One contained LA plus cephalin phospholipid and one contained a nonspecific venom anticoagulant. Sixteen methods were used overall with some participants using up to 8 methods. Results were scored in regard to the known potencies of LA in the samples and other known induced defects.Activated partial thromboplastin time (APTT) tests used by most participants for preliminary screening were relatively sensitive, but non-specific. Platelet or phospholipid neutralization procedures (PNP) appeared to be sensitive and specific but showed a non-linear response to increased LA content. Kaolin clotting time (KCT) tests showed the most sensitive response to increased LA content but the weaker LA were not scored as abnormal by most laboratories as the samples may have contained platelet fragments. Other commonly used tests such as the tissue thromboplastin inhibition (TTI) test and the dilute Russell’s viper venom test (DRVVT) were carried out somewhat inconsistently. The variability in performance of tests in different laboratories indicates that standardization of methodology is urgently required.Generally it seemed that most clotting tests were “bypassed” by the addition of phospholipid to a known LA-positive sample in apparently direct proportion to their sensitivity. Sample preparation, especially prevention of contamination with activated platelets is a vital preliminary part in the assay of LA.

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