WIT transactions on modelling and simulation最新文献_第8页

Generation of Custom Textual Model Editors 生成自定义文本模型编辑器

WIT transactions on modelling and simulation Pub Date : 2021-11-06 DOI: 10.3390/modelling2040032

Eugene Syriani, Daniel Riegelhaupt, B. Barroca, István Dávid

引用次数: 2

EC3-Compatible Methods for Analysis and Design of Steel Framed Structures 钢框架结构分析与设计的ec3兼容方法

WIT transactions on modelling and simulation Pub Date : 2021-11-03 DOI: 10.3390/modelling2040030

Sofia Antonodimitraki, P. Thanopoulos, I. Vayas

{"title":"EC3-Compatible Methods for Analysis and Design of Steel Framed Structures","authors":"Sofia Antonodimitraki, P. Thanopoulos, I. Vayas","doi":"10.3390/modelling2040030","DOIUrl":"https://doi.org/10.3390/modelling2040030","url":null,"abstract":"The behaviour of steel structures is affected by two nonlinearities—the geometric and material nonlinearity—and by the unavoidable presence of imperfections. To evaluate the ultimate capacity of a structure, these effects should be taken into consideration during the design process, either explicitly in the analysis or implicitly through the verification checks. In this context, Eurocode 3 provides several design approaches of different complexity and accuracy. The advantages and disadvantages of these approaches are discussed. Five different methods in conformity with the Eurocode provisions are applied for the design of four moment resisting steel frames of varying slenderness. The influence of nonlinearities and imperfections in respect to the slenderness of the structure is illustrated. The examined methods are compared in terms of the predicted ultimate capacity and their efficiency is assessed against the most accurate between them, i.e., an advanced geometrically and materially nonlinear analysis. It is shown that considerable differences arise between the methods. Nevertheless, except for the commonly used 2nd order analysis followed by cross-section verifications, the remaining methods are mostly on the safe side.","PeriodicalId":89310,"journal":{"name":"WIT transactions on modelling and simulation","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82984154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative Study of Optimization Models for Evaluation of EDM Process Parameters on Ti-6Al-4V Ti-6Al-4V电火花加工工艺参数评价优化模型比较研究

WIT transactions on modelling and simulation Pub Date : 2021-10-21 DOI: 10.3390/modelling2040029

J. Maddu, Buschaiah Karrolla, R. Shaik, S. Vuppala

{"title":"Comparative Study of Optimization Models for Evaluation of EDM Process Parameters on Ti-6Al-4V","authors":"J. Maddu, Buschaiah Karrolla, R. Shaik, S. Vuppala","doi":"10.3390/modelling2040029","DOIUrl":"https://doi.org/10.3390/modelling2040029","url":null,"abstract":"In this paper, different optimization techniques such as multi-objective optimization based on ratio analysis, the -nD angle, information divergence and multi-angle optimization methods were considered for comparative study in order to check their variation in results. These four techniques were considered asthese techniques were made from completely different methodologies, such as MOORA, is one of the latest multi-criteria decision-making methods that cover the weakness of other older methods and the latter three (-nD angle, Information Divergence and MAOT) methods are based on trigonometric methodologies. These optimization techniques were carried out using the effect of EDM process parameters viz., material removal rate and surface roughness as output parameters and current, pulse on time, pulse off time and different electrode materials as input process parameters. These parameters were obtained from the experiments modelled according to the Taguchi experimental design procedure in which the L18 orthogonal array was used to perform experimentation with the material of titanium alloy (Ti-6Al-4V). All the optimization techniques have obtained similar results among which -nD angle and Information Divergence technique tend to be easier and understandable for any similar application. The latter two methods avoid complexity and can be used for optimizing any relevant manufacturing process parameters such as the parameters of EDM, additive manufacturing, etc.","PeriodicalId":89310,"journal":{"name":"WIT transactions on modelling and simulation","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73076544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Automated Machine Learning Pipeline for Traffic Count Prediction 流量计数预测的自动机器学习管道

WIT transactions on modelling and simulation Pub Date : 2021-10-12 DOI: 10.3390/modelling2040026

Amirsaman Mahdavian, A. Shojaei, M. Salem, H. Laman, Jian Yuan, A. Oloufa

{"title":"Automated Machine Learning Pipeline for Traffic Count Prediction","authors":"Amirsaman Mahdavian, A. Shojaei, M. Salem, H. Laman, Jian Yuan, A. Oloufa","doi":"10.3390/modelling2040026","DOIUrl":"https://doi.org/10.3390/modelling2040026","url":null,"abstract":"Research indicates that the projection of traffic volumes is a valuable tool for traffic management. However, few studies have examined the application of a universal automated framework for car traffic volume prediction. Within this limited literature, studies using broad data sets and inclusive predictors have been inadequate; such works have not incorporated a comprehensive set of linear and nonlinear algorithms utilizing a robust cross-validation approach. The proposed model pipeline introduced in this study automatically identifies the most appropriate feature-selection method and modeling approach to reduce the mean absolute percentage error. We utilized hyperparameter optimization to generate a universal automated framework, distinct from model optimization techniques that rely on a single case study. The resulting model can be independently customized to any respective project. Automating much of this process minimizes the work and expertise required for traffic count forecasting. To test the applicability of our models, we used Florida historical traffic data from between 2001 and 2017. The results confirmed that nonlinear models outperformed linear models in predicting passenger vehicles’ monthly traffic volumes in this specific case study. By employing the framework developed in this study, transportation planners could identify the critical links on US roads that incur overcapacity issues.","PeriodicalId":89310,"journal":{"name":"WIT transactions on modelling and simulation","volume":"79 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77746314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Mixed Flow Analysis of Sewer Pipes with Different Shapes Using a Non-Oscillatory Two-Component Pressure Approach (TPA) 基于非振荡双分量压力法(TPA)的不同形状下水管道混流分析

WIT transactions on modelling and simulation Pub Date : 2021-10-09 DOI: 10.3390/modelling2040025

David Khani, Y. Lim, A. Malekpour

{"title":"A Mixed Flow Analysis of Sewer Pipes with Different Shapes Using a Non-Oscillatory Two-Component Pressure Approach (TPA)","authors":"David Khani, Y. Lim, A. Malekpour","doi":"10.3390/modelling2040025","DOIUrl":"https://doi.org/10.3390/modelling2040025","url":null,"abstract":"This paper aimed to justify the performance of a non-oscillatory TPA-based model proposed by the authors for capturing transient mix flow in sewer systems consisting of a variety of pipe shapes. The model utilizes a first-order Godunov Finite volume numerical scheme in which a Harten–Lax–van Leer (HLL) Riemann solver was used for calculating the fluxes at the cells’ boundaries. The spurious numerical solution associated with the transient mix flow analysis is suppressed by enhancing the numerical viscosity of the scheme when the pipe pressurization is imminent. Due to the lack of experimental data for systems with pipe shapes other than circular and rectangular, a hypothetical pipe system for which analytical solutions exist was employed to verify the model performance. The results reveal that for all pipe shapes considered, the model provides oscillation-free solutions even at a high acoustic speed of 1400 m/s. It is also observed that the numerical results are in perfect agreement with the analytical solution. The obtained results conclude that the proposed model can be utilized to capture transient responses of sewer systems with any pipe shape.","PeriodicalId":89310,"journal":{"name":"WIT transactions on modelling and simulation","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86396222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A Numerical Model for Tracing Structural Response of Ultra-High Performance Concrete Beams 超高性能混凝土梁结构响应跟踪的数值模型

WIT transactions on modelling and simulation Pub Date : 2021-10-01 DOI: 10.3390/modelling2040024

R. Solhmirzaei, V. Kodur

引用次数: 4

Interactive Agent-Based Simulation for Experimentation: A Case Study with Cooperative Game Theory 基于交互主体的实验模拟:合作博弈论的案例研究

WIT transactions on modelling and simulation Pub Date : 2021-09-29 DOI: 10.3390/modelling2040023

Andrew J. Collins, Sheida Etemadidavan

{"title":"Interactive Agent-Based Simulation for Experimentation: A Case Study with Cooperative Game Theory","authors":"Andrew J. Collins, Sheida Etemadidavan","doi":"10.3390/modelling2040023","DOIUrl":"https://doi.org/10.3390/modelling2040023","url":null,"abstract":"Incorporating human behavior is a current challenge for agent-based modeling and simulation (ABMS). Human behavior includes many different aspects depending on the scenario considered. The scenario context of this paper is strategic coalition formation, which is traditionally modeled using cooperative game theory, but we use ABMS instead; as such, it needs to be validated. One approach to validation is to compare the recorded behavior of humans to what was observed in our simulation. We suggest that using an interactive simulation is a good approach to collecting the necessary human behavior data because the humans would be playing in precisely the same context as the computerized agents. However, such a validation approach may be suspectable to extraneous effects. In this paper, we conducted a correlation research experiment that included an investigation into whether game theory experience, an extraneous variable, affects human behavior in our interactive simulation; our results indicate that it did not make a significant difference. However, in only 42 percent of the trials did the human participants’ behavior result in an outcome predicted by the underlying theory used in our model, i.e., cooperative game theory. This paper also provides a detailed case study for creating an interactive simulation for experimentation.","PeriodicalId":89310,"journal":{"name":"WIT transactions on modelling and simulation","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90691155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Quantifying the Impact of Inspection Processes on Production Lines through Stochastic Discrete-Event Simulation Modeling 用随机离散事件模拟模型量化检验过程对生产线的影响

WIT transactions on modelling and simulation Pub Date : 2021-09-26 DOI: 10.3390/modelling2040022

P. Martinez, Rafiq Ahmad

{"title":"Quantifying the Impact of Inspection Processes on Production Lines through Stochastic Discrete-Event Simulation Modeling","authors":"P. Martinez, Rafiq Ahmad","doi":"10.3390/modelling2040022","DOIUrl":"https://doi.org/10.3390/modelling2040022","url":null,"abstract":"Inspection processes are becoming more and more popular beyond the manufacturing industry to ensure product quality. Implementing inspection systems in multistage production lines brings many benefits in productivity, quality, and customer satisfaction. However, quantifying the changes necessary to adapt the production to these systems is analytically complicated, and the tools available lack the flexibility to visualize all the inspection strategies available. This paper proposed a discrete-event simulation model that relies on probabilistic defect propagation to quantify the impact on productivity, quality, and material supply at the introduction of inspection processes in a multistage production line. The quantification follows lean manufacturing principles, providing from quite basic quantity and time elements to more comprehensive key performance indicators. The flexibility of discrete-event simulation allows for customized manufacturing and inspection topologies and variability in the tasks and inspection systems used. The model is validated in two common manufacturing scenarios, and the method to analyze the cost-effectiveness of implementing inspection processes is discussed.","PeriodicalId":89310,"journal":{"name":"WIT transactions on modelling and simulation","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89973360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Lagrangian Tool for Simulating the Transport of Chemical Pollutants in the Arabian/Persian Gulf 模拟阿拉伯/波斯湾化学污染物输送的拉格朗日工具

WIT transactions on modelling and simulation Pub Date : 2021-09-17 DOI: 10.20944/preprints202109.0298.v1

R. Periáñez

引用次数: 2

Parametric Model Order Reduction of Guided Ultrasonic Wave Propagation in Fiber Metal Laminates with Damage 带损伤金属纤维层合板中导波传播的参数化模型降阶

WIT transactions on modelling and simulation Pub Date : 2021-09-17 DOI: 10.20944/preprints202109.0312.v1

Nanda Kishore Bellam Muralidhar, N. Rauter, A. Mikhaylenko, R. Lammering, D. Lorenz

{"title":"Parametric Model Order Reduction of Guided Ultrasonic Wave Propagation in Fiber Metal Laminates with Damage","authors":"Nanda Kishore Bellam Muralidhar, N. Rauter, A. Mikhaylenko, R. Lammering, D. Lorenz","doi":"10.20944/preprints202109.0312.v1","DOIUrl":"https://doi.org/10.20944/preprints202109.0312.v1","url":null,"abstract":"This paper focuses on parametric model order reduction (PMOR) of guided ultrasonic wave propagation and its interaction with damage in a fiber metal laminate (FML). Structural health monitoring in FML seeks to detect, localize and characterize the damage with high accuracy and minimal use of sensors. This can be achieved by the inverse problem analysis approach which employs the signal measurement data recorded by the embedded sensors in the structure. The inverse analysis requires to solve the forward simulation of the underlying system several thousand times. These simulations are often exorbitantly expensive and triggered the need for improving their computational efficiency. A PMOR approach hinged on the proper orthogonal decomposition method is presented in this paper. An adaptive parameter sampling technique is established with the aid of a surrogate model to efficiently update the reduced-order basis in a greedy fashion. A numerical experiment is conducted to illustrate the parametric training of the reduced-order model. The results show that the reduced-order solution based on the PMOR approach is accurately complying with that of the high fidelity solution.","PeriodicalId":89310,"journal":{"name":"WIT transactions on modelling and simulation","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83256879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4