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Computation of dimensional variations on the structural analysis of multi-cell aircraft box beams with python scripting

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AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY 2021年第5期93卷 880-887页

作者： Yavuz, Hande Univ Turkish Aeronaut Assoc Dept Astronaut Engn Ankara Turkey

Purpose python codes are developed for the versatile structural analysis on a 3 spar multi-cell box beam by means of idealization approach. Design/methodology/approach Shear flow distribution, stiffener loads, location of shear center and location of geometric center are computed via numpy module. Data visualization is performed by using Matplotlib module. Findings python scripts are developed for the structural analysis of multi-cell box beams in lieu of long hand solutions. In-house developed python codes are made available to be used with finite element analysis for verification purposes. Originality/value The use of python scripts for the structural analysis provides prompt visualization, especially once dimensional variations are concerned in the frame of aircraft structural design. The developed python scripts would serve as a practical tool that is widely applicable to various multi-cell wing boxes for stiffness purposes. This would be further extended to the structural integrity problems to cover the effect of gaps and/or cut-outs in shear flow distribution in box-beams.

关键词： Structural analysis Multi-cell beams Numerical python python scripting Thin airfoil

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Application of python scripting Techniques for Control and Automation of HEC-RAS Simulations

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WATER 2018年第10期10卷 1382-1382页

作者： Dysarz, Tomasz Poznan Univ Life Sci Dept Hydraul & Sanit Engn Ul Wojska Polskiego 28 PL-60637 Poznan Poland

The purpose of the paper was to present selected techniques for the control of river flow and sediment transport computations with the programming language python. The base software for modeling of river processes was the well-known and widely used HEC-RAS. The concepts were tested on two models created for a single reach of the Warta river located in the central part of Poland. The ideas described were illustrated with three examples. The first was a basic simulation of a steady flow run from the python script. The second example presented automatic calibration of model roughness coefficients with Nelder-Mead simplex from the SciPy module. In the third example, the sediment transport was controlled by python script. Sediment samples were accessed and changed in the sediment data file stored in XML format. The results of the sediment simulation were read from HDF5 files. The presented techniques showed good effectiveness of this approach. The paper compared the developed techniques with other, earlier approaches to control of HEC-RAS computations. Possible further developments were also discussed.

关键词： river flow modeling sediment transport simulation automation of flow modeling HEC-RAS controller python scripting

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Development of ABAQUS Plugin Predicting the Mechanical Behavior and Failure Modes of Weft Knitted-Reinforced Composites

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FIBERS AND POLYMERS 2025年第2期26卷 883-907页

作者： Omrani, Elahe Dibajian, Sayed Houssain Hasani, Hossein Isfahan Univ Technol Dept Text Engn Esfahan Iran Shahid Beheshti Univ Dept Mech & Energy Engn Tehran Iran

The objective of this work is to create an ABAQUS plugin for predicting the failure mechanism, and mechanical characteristics of weft-knitted reinforced composites utilizing multi-scale modeling. This plugin facilitates the automatic modeling and analysis of weft-knitted reinforced composites, focusing on parameters such as stiffness, strength, and failure mechanisms. The developed plugin estimates the homogenized effective elastic properties of a user-created macro-model for a weft-knitted reinforced composite structure. The plugin correctly extracts the concepts of homogenization based on micromechanics parametric inputs of fiber and resin which are considered separately by the software's user. Afterward, the homogenized constants of the composites are automatically applied to the macro-model to achieve the most susceptible areas for failure after the localization step. It also enables the prediction of the composite strength and the identification of the sample's critical mesoscale regions. This paper also explains the plugin's homogenization and localization-based approach. Prior to carrying out parametric research, the simulation findings are verified using experimental data. Furthermore, experimental instances demonstrating its implementation and validation are provided. A comparative analysis of tensile characteristics between the multi-scale finite element model and experimental results disclosed that the model exhibited an overestimation of the failure strength in the course and wale directions by approximately 13%. Furthermore, the error due to predicting the tensile modulus in both directions is less than 7%. The results obtained from the prediction of the plugin revealed the approximate locations of failures within the composite unit cell under tensile loading in both course and wale directions.

关键词： Multi-scale modeling Finite element Weft-knitted composites Auto textile plugin Mechanical behavior python scripting

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Structural optimization of composite corrugated cores with variable stiffness

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MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES 2024年第9期52卷 6078-6100页

作者： Monsef, Mohammad Sajad Shamsi Shaban, Mahdi Khoshlesan, Sanaz Bu Ali Sina Univ Mech Engn Dept Hamadan Iran

Outstanding progress in manufacturing technology of fiber-reinforced composite materials, allows designers to go beyond classical design rules. Composites with variable stiffness are an innovative division of composite materials that provide more efficient designs for engineers due to their diverse design parameters. In this study, a straightforward methodology is presented for the design of sandwich panels with corrugated variable stiffness core. Based on the homogenization method, a unit-cell of the sandwich panel is used as a representative volume element for the sandwich panel with corrugated core. Due to multiple design variables, conventional numerical and analytical methods cannot be applied to variable stiffness composites, thus python/ABAQUS framework is developed to determine the extensional and bending behavior of unit-cells. Details of this framework including python scripting and ABAQUS finite element solver are given along with their corresponding functions. Furthermore, the elitist genetic algorithm is incorporated into a framework for the optimum design of variable stiffness cores. Two optimization problems, namely composites with variable thickness and variable angle are considered for unit-cells, and associated constraints, boundary conditions, and fitness functions are discussed in detail. In addition to the benefits of the proposed framework, the obtained results reveal notable enhancement in the extensional and bending behavior of unit-cell. Results reveal that corresponding displacements are significantly improved (up to 80%) when using the optimum variable thickness case. For variable angle cases, the improvement of displacements is up to about 28%.

关键词： Corrugated core variable stiffness composite sandwich panel python scripting optimization elitist genetic algorithm

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Estimation of parameters for 3D geomechanical modeling from triaxial test results

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Energy Geoscience 2025年第1期6卷 1-6页

作者： Artem Kukhtinskii Perm National Research Polytechnic University Komsomolskiy Pr.29PermRussia

Triaxial testing serves as a fundamental method for evaluating the elastic and strength properties of rocks,crucial for developing accurate 3D geomechanical *** paper presents a novel method for determining strength parameters by incorporating the dependence of uniaxial compressive strength(UCS)on P-wave velocity into the Hoek-Brown ***,a new approach is introduced to process triaxial test data efficiently using python libraries such as SciPy,NumPy,Matplotlib,and ***,the paper addresses challenges in determining elastic parameters through triaxial testing.A python script is developed to automate the calculation of elastic modulus and Poisson's ratio,over-coming subjectivity in selecting the linear portion of stress-strain *** script optimally identifies the linear region by minimizing the fit error with appropriate constraints,ensuring a more objective and standardized *** proposed methodologies are demonstrated using limestone specimens from Central Asian gas *** innovations offer faster,more reliable results,reducing error and enhancing the comparability of analyses in geomechanics,with potential applications across various geological settings.

关键词： Strength criterion P-wave Elastic modulus Triaxial test python scripting

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Design approach against failure of the earth support using the finite element method

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BAUTECHNIK 2023年第9期100卷 526-534页

作者： Jurgens, Hauke Henke, Sascha Univ Bundeswehr Hamburg Helmut Schmidt Univ Geotechn Holstenhofweg 85 D-22043 Hamburg Germany

The application of the finite element method (FEM) in geotechnical engineering has been established in the last decades for the prediction of deformations in the serviceability limit state (SLS). In practice, stability analyses in the ultimate limit state (ULS) are only partially performed using the FEM and are currently still state of the art. The next generation of Eurocode 7 is intended to regulate numerical methods with regard to their application in the ULS. However, the handling of the additionally required analysis of the German National Annex and DIN 1054 is still unsolved. In this paper, an approach for the numerical analysis of the earth support is presented. Following the wellestablished strength reduction method, the weight of the soil. and the cohesion c0 on the earth resistance side are reduced until failure occurs. On the basis of this, the analysis in ULS is carried out by defining a safety factor for the existing embedment depth of the retaining wall. This is followed by a comparison with the analytical free earth support method, identifying system reserves using the FEM.

关键词： FEM soil-structure-interaction excavation pits ULS verification earth support python scripting

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swmm_api: A python Package for Automation, Customization, and Visualization in SWMM-Based Urban Drainage Modeling

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WATER 2025年第9期17卷 1373-1373页

作者： Pichler, Markus Graz Univ Technol Inst Urban Water Management & Landscape Water Engn A-8010 Graz Austria

The python package swmm_api addresses a critical gap in urban drainage modeling by providing a flexible, script-based tool for managing SWMM models. Recognizing the limitations of existing solutions, this study developed a python-based approach that seamlessly integrates SWMM model creation, editing, analysis, and visualization within python's extensive ecosystem. The package offers intuitive, dictionary-like interactions with model components, enabling manipulation of input files and extraction of results as structured data. It supports advanced GIS integration, sensitivity analysis, calibration, and uncertainty estimation through libraries like GeoPandas, SALib, and SPOTPY. Results demonstrate significant efficiency improvements in repetitive tasks, including batch simulations, sensitivity analyses, and automated GIS data processing, exemplified by practical applications such as model updates for municipal sewer systems. The package significantly enhances reproducibility and facilitates transparent sharing of scientific workflows. Overall, swmm_api provides researchers and practitioners with a robust, adaptable solution for streamlined urban drainage modeling.

关键词： urban hydrology stormwater management model automation GIS integration model calibration sensitivity analysis python scripting sewer network data visualization open science

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Numerical Modeling of Connections with Screws in Cross-Laminated Timber

Numerical Modeling of Connections with Screws in Cross-Lamin...

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Annual Conference of the Canadian-Society-for-Civil-Engineering (CSCE)

作者： Sejkot, Petr Iqbal, Asif Czech Tech Univ Prague Czech Republic Univ Northern British Columbia Prince George BC Canada

ISBN: (纸本)9783031615337;9783031615313;9783031615306

Reinforced angle brackets are commonly used as connectors in wood structures. These connectors are typically installed with ring shank nails or screws. This paper presents the experimental results of cross-laminated timber (CLT) connections which consist of reinforced angle brackets and heavy-duty screws. These screws are one of the stiffest and the strongest options for the fasteners which can be used with the reinforced angle brackets. However, this option has not been extensively studied by many scholars yet. Therefore, this paper contains detailed numerical simulations with aim to be able to predict the failure modes and the load-bearing capacities of experimentally tested connections. Benefits together with the limitations of the presented numerical method are discussed.

关键词： Timber connections Angle brackets Screws Numerical simulation Full-scale tests python scripting

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Balancing Detection Speed and Resource Efficiency in Healthcare Vulnerability Scanning 29

Balancing Detection Speed and Resource Efficiency in Healthc...

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29th IEEE Symposium on Computers and Communications (IEEE ISCC)

作者： Belghith, Aymen Saudi Elect Univ Comp Sci Dept Riyadh Saudi Arabia

ISBN: (纸本)9798350354249;9798350354232

Vulnerable systems are a prime target for cyberattacks in healthcare organizations. This paper explores how automatic vulnerability scanning, triggered by network changes through python scripting, can significantly reduce the window of opportunity for attackers. We delve into the crucial yet challenging task of finding the optimal scan frequency, balancing faster detection of vulnerabilities with minimized resource consumption on healthcare networks. A risk- based framework is presented to guide this selection process. Furthermore, we address the issue of false positives in Network Traffic Analysis (NTA) and propose mitigation strategies to enhance the accuracy of threat detection. By implementing these recommendations, healthcare organizations can establish a proactive approach to network security, safeguarding sensitive patient data and ensuring the continuity of critical healthcare services.

关键词： Healthcare Network Security Automatic Vulnerability Scanning python scripting Network Traffic Analysis (NTA) Risk-Based Scanning Frequency

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An Abaqus plug-in to simulate fatigue crack growth

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ENGINEERING WITH COMPUTERS 2022年第4期38卷 2991-3005页

作者： Malekan, Mohammad Khosravi, Ali St-Pierre, Luc Aarhus Univ Dept Mech & Prod Engn DK-8000 Aarhus C Denmark Aalto Univ Dept Mech Engn Espoo Finland

Fatigue crack propagation is an important consideration in evaluating the design life of engineering components, especially in the energy and transport industries. Despite its importance, fatigue analyses are not usually supported by commercial Finite Element (FE) codes;in fact, most FE codes require the addition of costly plug-ins to perform fatigue crack growth simulations. Therefore, this paper introduces a new, freely distributed plug-in to simulate fatigue crack growth with the commercial FE code Abaqus. The plug-in includes five different fatigue crack growth models and relies on the extended FE method to simulate crack propagation. The plug-in is limited to 2D analyses, but covers all necessary steps for fatigue crack growth simulations, from creating the geometry to job submission and post-processing. The implementation of the plug-in is validated by comparing its predictions to analytical and experimental results. Finally, we hope that the simplicity of the plug-in and the fact that it is distributed freely will make it a useful simulation tool for industrial, research and educational purposes.

关键词： Fatigue crack growth Abaqus plug-in python scripting Finite element method Life estimation

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