REALISM: reusable elements for animation using local integrated simulation models

2002 ◽  
Author(s):  
I.J. Palmer ◽  
R.L. Grimsdale
Keyword(s):  
Simulation Models ◽  
Integrated Simulation

scholarly journals Integrated Simulation Modeling Approach for Investigating Pore Water Pressure Induced Landslides

2022 ◽  
Author(s):  
Sahila Beegum ◽  
P J Jainet ◽  
Dawn Emil ◽  
K P Sudheer ◽  
Saurav Das
Keyword(s):  
Pore Water ◽  
Factor Of Safety ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Simulation Models ◽  
Integrated Simulation ◽  
Hill Slope ◽  
Slope Factor ◽  
The Stability ◽  
The Hill

Abstract Soil pore water pressure analysis is crucial for understanding landslide initiation and prediction. However, field-scale transient pore water pressure measurements are complex. This study investigates the integrated application of simulation models (HYDRUS-2D/3D and GeoStudio–Slope/W) to analyze pore water pressure-induced landslides. The proposed methodology is illustrated and validated using a case study (landslide in India, 2018). Model simulated pore water pressure was correlated with the stability of hillslope, and simulation results were found to be co-aligned with the actual landslide that occurred in 2018. Simulations were carried out for natural and modified hill slope geometry in the study area. The volume of water in the hill slope, temporal and spatial evolution of pore water pressure, and factor of safety were analysed. Results indicated higher stability in natural hillslope (factor of safety of 1.243) compared to modified hill slope (factor of safety of 0.946) despite a higher pore water pressure in the natural hillslope. The study demonstrates the integrated applicability of the physics-based models in analyzing the stability of hill slopes under varying pore water pressure and hill slope geometry and its accuracy in predicting future landslides.

scholarly journals Policy coherence to achieve the SDGs: using integrated simulation models to assess effective policies

2017 ◽  
Vol 12 (6) ◽  
pp. 921-931 ◽  
Author(s):  
David Collste ◽  
Matteo Pedercini ◽  
Sarah E. Cornell
Keyword(s):  
Simulation Models ◽  
Policy Coherence ◽  
Integrated Simulation

scholarly journals Evaluation of Freight Measures by Integrating Simulation Tools: The Case of Volos Port, Greece

2018 ◽  
Vol 19 (3) ◽  
pp. 224-232 ◽  
Author(s):  
Ioannis Karakikes ◽  
Wladimir Hofmann ◽  
Lambros Mitropoulos ◽  
Mihails Savrasovs
Keyword(s):  
Impact Evaluation ◽  
Simulation Models ◽  
Simulation Modelling ◽  
Simulation Software ◽  
Transport Systems ◽  
Integrated Simulation ◽  
Simulation Tools ◽  
Traffic Conditions ◽  
High Level ◽  
Decision Making Tool

Abstract Simulation modelling tools have been widely adopted for the evaluation of alternatives in transport planning, management and logistics. The complexity that underlies in transport systems and logistics necessitate the integration of different models that are capable of overcoming limitations that may exist individually to each model. Towards this direction, this paper aims to integrate two simulation software and use the integrated model for the evaluation of traffic and logistics measures in the wider area of Volos Port, Greece. The built model is able to simulate the traffic conditions on a transport network along with port’s intra-logistics processes and is used to evaluate a set of measures in the year 2030, by comparing it with the situation in the year 2030 without having implemented any new measure. For the evaluation, a set of indicators is used to gauge the environmental and transport impacts. The analysis is completed by using a multi-criteria decision making tool to generate the Logistics Sustainability Index (LSI) to summarize the information that is provided by the indicators. The results show that the use of integrated simulation models can provide a holistic impact evaluation of complex decisions with a high level of accuracy.

scholarly journals DEVS-Based Building Blocks and Architectural Patterns for Intelligent Hybrid Cyberphysical System Design

Information ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 531
Author(s):  
Bernard Zeigler
Keyword(s):  
System Design ◽  
System Development ◽  
Simulation Models ◽  
Building Blocks ◽  
Science Literature ◽  
Cognitive Behaviors ◽  
Integrated Simulation ◽  
Architectural Patterns ◽  
Minimal Realizations ◽  
Cyberphysical System

The DEVS formalism has been recognized to support generic open architectures that allow incorporating multiple engineering domains within integrated simulation models. What is missing for accelerated adoption of DEVS-based methodology for intelligent cyberphysical system design is a set of building blocks and architectural patterns that can be replicated and reused in system development. As a start in this direction, this paper offers a notional architecture for intelligent hybrid cyberphysical system design and proceeds to focus on the decision layer to consider DEVS models for basic behaviors such as choice of alternatives, perception of temporal event relations, and recognition and generation of finite state languages cast into DEVS time segments. We proceed to describe a methodology to define DEVS-based building blocks and architectural patterns for design of systems employing fast, frugal, and accurate heuristics. We identify some elements of this kind and establish their status as minimal realizations of their defined behaviors. As minimal realizations such designs must ipso facto underlie any implementation of the same cognitive behaviors. We discuss architectures drawn from the cognitive science literature to show that the fundamental elements drawn from the fast, frugal, and accurate paradigm provide insights into intelligent hybrid cyberphysical system design. We close with open questions and research needed to confirm the proposed concepts.

PNAVSIM: A Numerical Simulation Package for Pulsar Navigation

2013 ◽  
Vol 313-314 ◽  
pp. 1069-1073 ◽  
Author(s):  
Liang Wei Huang ◽  
Bin Liang ◽  
Tao Zhang
Keyword(s):  
Pulse Signal ◽  
Simulation Models ◽  
Integrated Simulation ◽  
Navigation Algorithms ◽  
Spacecraft Orbit ◽  
Simulation Purpose ◽  
Pulsar Navigation ◽  
Signal Time ◽  
Different Levels ◽  
Simulation Package

PNAVSIM is a package for numerical investigation of pulsar navigation. It contains a number of methods and algorithms for the simulation purpose in navigation. The photon-level integrated simulation model can be built easily based on the PNAVSIM library. The toolkit API can also be conveniently used by the developer in his own program. Functions are packed into modules at different levels. The top-level modules dealing with the spacecraft orbit dynamics, the pulse signal time delay, and the navigation algorithms are introduced. The structure of the PNAVSIM package makes it possible for developers to build simulation models flexibly and quickly, which enables more efficient applications of pulsar navigation.

Scour Effects on the Structural Integrity of Offshore Wind Turbine Monopiles

2021 ◽  
Author(s):  
George E. Varelis ◽  
Jun Ai ◽  
Prasad Kane ◽  
Hossam Ragheb ◽  
Elie Dib
Keyword(s):  
Structural Integrity ◽  
Large Diameter ◽  
Simulation Models ◽  
Offshore Wind ◽  
Mitigation Measures ◽  
Offshore Wind Turbine ◽  
Element Analysis ◽  
Gas Industry ◽  
Integrated Simulation ◽  
Life Predictions

Abstract Large diameter monopiles are widely used for the installation of offshore wind turbines in relatively shallow water depth applications. Monopiles are considered as a cost and time-efficient foundation solution, taking advantage of the experience gained from the Oil&Gas industry. Due to their relatively large diameter, monopiles are susceptible to scour effects that threaten their structural integrity and necessitate the application of high-cost mitigation measures. The mitigation measures are also associated with heavy environmental impact at the local subsea environment, as well as increased CO2 emissions for their application. The present work examines the effect of scour on the structural integrity of monopiles using integrated simulation models that combine advanced finite element analysis (FEA) and computational fluid dynamics (CFD) techniques. A typical monopile geometry and North Sea representative metocean data are used in a case study. In this example analysis emphasis is given on the structural integrity deterioration resulting from the scour development over time. Advanced techniques are employed to simulate the soil-pile interaction. Furthermore, fluid-structure interaction effects due to the water flow around the monopile are examined using CFD techniques. Finally, fatigue life predictions of sensitive areas are conducted based on the “S-N methodology” and are enhanced by employing crack-growth analyses based on linear elastic fracture mechanics principles.

scholarly journals Modeling and Analysis on Cushion Characteristics of Fast and High-Flow-Rate Hydraulic Cylinder

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Qiwei Lai ◽  
Liang Liang ◽  
Jing Li ◽  
Shijing Wu ◽  
Jun Liu
Keyword(s):  
Simulation Model ◽  
Flow Rate ◽  
Structural Parameters ◽  
Simulation Models ◽  
Hydraulic Cylinder ◽  
Fast Response ◽  
Industrial Applications ◽  
High Flow ◽  
High Flow Rate ◽  
Integrated Simulation

As an indispensable actuator, the hydraulic cylinder has widespread industrial applications in mechanical engineering. The cushion characteristics of hydraulic cylinder directly affect its performance and reliability, especially the one utilized in hydraulic system with fast response, high flow rate, and instantaneous super power. In order to analyze the cushion characteristics, three different simulation models are established. Furthermore, experiments concerning the pressure characteristics of hydraulic cylinder are accomplished to verify the validation of simulation models. It was found that the integrated simulation model had the highest precision and CFD model showed better pattern of cushion process compared with other models. On the basis of the integrated simulation model, plunger structure and key structural parameters were studied in detail with optimal schemes given. The conical structure, proper design of the diameter of cushion hole, and length of plunger turned out to be effective in promoting the cushion performance. The proposed simulation models and research of cushion structure have scientific and engineering value to promote the innovative development of hydraulic cylinder.

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