Scaling Up of Local Ice Pressures for a Fixed Offshore Platform Based on Ice Basin Model Data

2020 ◽  
Author(s):  
Anatolii V. Aleksandrov ◽  
Viktor V. Platonov ◽  
Valery M. Shaposhnikov
Keyword(s):  
Computer Simulation ◽  
Similarity Theory ◽  
Scaling Up ◽  
Full Scale ◽  
Model Data ◽  
Deformation Mechanics ◽  
Local Pressures ◽  
Fixed Offshore Platform ◽  
Scaling Principle ◽  
Limiting Surface

Abstract Fundamentals of the similarity theory in the ice deformation mechanics, as well as problems related to scaling up of local ice pressures measured during tests in an ice basin to full scale values are considered. A new scaling principle based on a hypothesis of ice deformation limiting surface isomorphism and direct computer simulation is proposed. An ice-resistant platform, for which local pressures were measured in ice tests and ice pressures were recalculated to full scale values using generated ice deformation limiting surfaces, was considered as an example.

The Reconstruction Scheme Design and Experiment of the Height-Adjustable W-Beam Guardrail

2012 ◽  
Vol 490-495 ◽  
pp. 2676-2680
Author(s):  
Hong Jun Cui ◽  
Xiao Jing Shen ◽  
Yu Liu ◽  
Xi Xin Sun
Keyword(s):  
Computer Simulation ◽  
Full Scale ◽  
Scheme Design ◽  
Roadside Safety ◽  
Reconstruction Scheme ◽  
Crash Tests

Pave overlay to the freeway repeatedly causes the guardrail’s height lower and lower, which seriously influences its performance in protection and safety. The paper aims to work out a height-adjustable W-beam guardrail which is economic, feasible and safe to solve the shortage in barrier’s height causes from paving overlays by computer simulation tests and full-scale crash tests, which will improve the roadside safety of the guardrail and save the reconstruction cost.

Relation Between Full-Scale and Model Data

2020 ◽  
Author(s):  
Horia Hangan ◽  
Maryam Refan ◽  
Djordje Romanic
Keyword(s):  
Numerical Simulations ◽  
State Of The Art ◽  
Full Scale ◽  
The State ◽  
Reduced Model ◽  
Model Data ◽  
Model Simulations ◽  
Velocity Scale ◽  
Scale Data

This chapter introduces recent results aiming to compare full-scale data and simulations of tornadoes and to establish a framework through which simulations of tornado-like vortices (both physical and numerical) can be compared to full-scale data. Physical and sometimes numerical simulations of non-synoptic winds such as tornadoes and downbursts are performed at a reduced (model) scale (Λl) compared to reality (prototype). That approach implies that there is also a timescale (Λt) and a velocity scale (Λv) involved, and the three of them are interlinked. The proper determination of these scales is critical in the process of translating results from model simulations to reality. This chapter discusses the state of the art of determining these scales for two types of non-synoptic winds—tornadoes and downbursts.

Computer simulation of coal gasification in a full scale plant

2017 ◽  
Vol 39 (8) ◽  
pp. 768-774 ◽  
Author(s):  
Wenfei Xi ◽  
Zhengtao Shi ◽  
Mohammad Reza Farahani ◽  
Wei Gao
Keyword(s):  
Computer Simulation ◽  
Coal Gasification ◽  
Full Scale

Water Impact Loads

1976 ◽  
Vol 13 (01) ◽  
pp. 46-58
Author(s):  
F. H. Sellars
Keyword(s):  
Scaling Laws ◽  
Scale Effects ◽  
Structural Characteristics ◽  
Pressure Ratio ◽  
Velocity Ratio ◽  
Full Scale ◽  
Impact Pressure ◽  
Water Model ◽  
Absolute Pressure ◽  
Model Data

This paper covers an analysis of different types of slamming experiments with account taken of different model structural characteristics and the effect of air entrapped in the water. Model data for peak impact pressure are found to correlate on the basis of an absolute pressure ratio and a velocity ratio that accounts for inertial effects. Scaling laws for slamming are identified. Impact pressure data from full-scale trials are compared with model data on the basis of the scaling laws identified from model data to demonstrate that the model data and the scaling laws are applicable to full-scale ships. Scale effects which may cause errors when extrapolating model results for impact pressure to the full scale are also discussed. A proposed basis for estimation of peak pressures for water impacts by use of model results is shown to result in conservative predictions when compared with full-scale measurements.

The Necessity for Scale Up in R&D: Approach for Waste Immobilisation in Cement by BNFL

1995 ◽  
Vol 412 ◽  
Author(s):  
Graham A Fairhall ◽  
Eric W Miller
Keyword(s):  
Material Properties ◽  
Large Scale ◽  
Scale Up ◽  
Scaling Up ◽  
Full Scale ◽  
Physical Parameters ◽  
Wide Range ◽  
Regulatory Bodies ◽  
Major Factors

AbstractThe full scale processing of nuclear wastes immobilised in cement utilises a wide range of chemical and physical parameters. The success of this work however, involves many factors and material properties which are affected by the actual scaling up processes. The paper outlines the approach and experience gained by BNFL to recognise and evaluate the major factors involved in order to successfully produce large scale stable products acceptable to the appropriate regulatory bodies and suitable for long term disposal.

Correlation Analysis of Computer Simulation with Full-Scale Impact Test for Barrier Safety Evaluation

2011 ◽  
Vol 94-96 ◽  
pp. 2092-2101
Author(s):  
Xin Peng Shao ◽  
Hui Ji ◽  
Shu Ming Yan ◽  
Qi Qian Li ◽  
Ning Jia ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Performance Evaluation ◽  
Impact Test ◽  
Safety Evaluation ◽  
Simulation Models ◽  
Simulation Method ◽  
Full Scale ◽  
Safety Performance ◽  
Computer Simulation Method ◽  
Set Up

In order to analyze the feasibility of barrier safety performance evaluation with computer simulation method, finite-element models of various vehicles and barriers were set up and simulations results are compared to multiple full-scale impact test data. The results indicate that all safety performance index such as vehicle trajectory, structural adequacy, occupant risk and dynamic deformation can be extracted from computer simulation and FEA results are coincident with those of tests with error less than 10%. Computer simulation method is proved to be highly feasible for safety performance evaluation of barriers. The concept that simulation models must be verified through tests is stressed and the suggestion that laws and regulations on professional audit and management of CAE engineers should be completed is brought out.

Aircraft Evacuation Simulation: A Developing Method to Improve Aviation Safety

2013 ◽  
Vol 444-445 ◽  
pp. 825-830
Author(s):  
Da Wei Chen ◽  
Zhon Gyan Qian ◽  
Cai Jun Xue
Keyword(s):  
Computer Simulation ◽  
Theoretical Foundation ◽  
Aviation Safety ◽  
Research Field ◽  
Full Scale ◽  
Evacuation Simulation ◽  
Certification Test ◽  
Developing Method ◽  
Meaningful Research

To achieve airworthiness requirements, 90 second certification test is performed to show compliance. Recent development in the application of computer simulation makes it possible to improve aviation safety through aircraft evacuation simulation. The approach can replace the full scale certification demonstration and has attracted extensive interest. Various evacuation models have been developed to simulate evacuation process. This review investigates the modeling theoretical foundation and summaries individual applications in different scenarios. Moreover, a meaningful research field is proposed for further study.

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