An elastoplastic hinge model for transient beam response analysis hasbeen developed. A variety of monotonic curves as well as hystereutic cyclescan be constructed. Special models…
Abstract
An elastoplastic hinge model for transient beam response analysis has been developed. A variety of monotonic curves as well as hystereutic cycles can be constructed. Special models for unstable cycles of constitutive relationships are offered by this model. Practical cases such as impact of a hollow section or cracking of a reinforced concrete beam can be handled. The application to the analysis of the impact of a rectangular hollow section is shown. Good performance is obtained and comparison is made with the use of an explicit impact code.
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Gives a bibliographical review of the finite element methods (FEMs) applied for the linear and nonlinear, static and dynamic analyses of basic structural elements from the…
Abstract
Gives a bibliographical review of the finite element methods (FEMs) applied for the linear and nonlinear, static and dynamic analyses of basic structural elements from the theoretical as well as practical points of view. The range of applications of FEMs in this area is wide and cannot be presented in a single paper; therefore aims to give the reader an encyclopaedic view on the subject. The bibliography at the end of the paper contains 2,025 references to papers, conference proceedings and theses/dissertations dealing with the analysis of beams, columns, rods, bars, cables, discs, blades, shafts, membranes, plates and shells that were published in 1992‐1995.
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Jonathan Núñez Aedo, Marcela A. Cruchaga and Mario A. Storti
This paper aims to report the study of a fluid buoy system that includes wave effects, with particular emphasis on validating the numerical results with experimental data.
Abstract
Purpose
This paper aims to report the study of a fluid buoy system that includes wave effects, with particular emphasis on validating the numerical results with experimental data.
Design/methodology/approach
A fluid–solid coupled algorithm is proposed to describe the motion of a rigid buoy under the effects of waves. The Navier–Stokes equations are solved with the open-source finite volume package Code Saturne, in which a free-surface capture technique and equations of motion for the solid are implemented. An ad hoc experiment on a laboratory scale is built. A buoy is placed into a tank partially filled with water; the tank is mounted into a shake table and subjected to controlled motion that promotes waves. The experiment allows for recording the evolution of the free surface at the control points using the ultrasonic sensors and the movement of the buoy by tracking the markers by postprocessing the recorded videos. The numerical results are validated by comparison with the experimental data.
Findings
The implemented free-surface technique, developed within the framework of the finite-volume method, is validated. The best-obtained agreement is for small amplitudes compatible with the waves evolving under deep-water conditions. Second, the algorithm proposed to describe rigid-body motion, including wave analysis, is validated. The numerical body motion and wave pattern satisfactorily matched the experimental data. The complete 3D proposed model can realistically describe buoy motions under the effects of stationary waves.
Originality/value
The novel aspects of this study encompass the implementation of a fluid–structure interaction strategy to describe rigid-body motion, including wave effects in a finite-volume context, and the reported free-surface and buoy position measurements from experiments. To the best of the authors’ knowledge, the numerical strategy, the validation of the computed results and the experimental data are all original contributions of this work.
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Gives a bibliographical review of the finite element meshing and remeshing from the theoretical as well as practical points of view. Topics such as adaptive techniques for meshing…
Abstract
Gives a bibliographical review of the finite element meshing and remeshing from the theoretical as well as practical points of view. Topics such as adaptive techniques for meshing and remeshing, parallel processing in the finite element modelling, etc. are also included. The bibliography at the end of this paper contains 1,727 references to papers, conference proceedings and theses/dissertations dealing with presented subjects that were published between 1990 and 2001.
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Marcela Cruchaga and Diego Celentano
This work is devoted to the experimental analysis, numerical modelling and validation of ice melting processes.
Abstract
Purpose
This work is devoted to the experimental analysis, numerical modelling and validation of ice melting processes.
Design/methodology/approach
The thermally coupled incompressible Navier‐Stokes equations including water density inversion and isothermal phase‐change phenomena are assumed as the governing equations of the problem. A fixed‐mesh finite element formulation is proposed for the numerical solution of such model. In particular, this formulation is applied to the analysis of two different transient problems.
Findings
The numerical results computed with the finite element formulation have been found to be very similar to the corresponding predictions, also obtained in this study, provided by a finite volume enthalpy‐based technique. Both numerical results, in turn, satisfactorily approached the available experimental measurements expressly conducted in the context of this work for validation purposes.
Research limitations/implications
They are mainly due to some model simplifications (e.g. no volume changes are considered during the solid‐liquid transformation) and to the inherent difficulties associated with the experimental measurements.
Practical implications
This study may be relevant for a better understanding of the phenomena occurring in different engineering applications involving phase‐change in water: food freezing, ice formation in pipes, freezing/melting processes in soils, ice growth in plane wings, etc.
Originality/value
The study is mainly focused on the validation of the numerical predictions obtained with the finite element formulation mentioned above with other results provided by a well‐known finite volume technique and, in addition, with available laboratory measurements carried out in the context of this work.
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Krishanu Ganguly, Saurabh Chandraker and Haraprasad Roy
The purpose of this study is to bring down collective information about various issues encountered in modelling of rotor systems.
Abstract
Purpose
The purpose of this study is to bring down collective information about various issues encountered in modelling of rotor systems.
Design/methodology/approach
The most important and basic part of “rotor dynamics” is the study related to its different modelling techniques which further involves the analysis of shaft for understanding the system potential, competence and reliability. The issues addressed in this study are classified mainly into two parts: the initial part gives out a vast overview of significant problems as well as different techniques applied to encounter modelling of rotor systems, while the latter part of the study describes the post-processing problem that occurs while performing the dynamic analysis.
Findings
The review incorporates the most important research works that have already placed a benchmark right from the beginning as well as the recent works that are still being carried out to further produce better outcomes. The review concludes with the modal analysis of rotor shaft to show the importance of mathematical model through its dynamic behaviour.
Originality/value
A critical literature review on the modelling techniques of rotor shaft systems is provided from earliest to latest along with its real-time application in different research and industrial fields.
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This paper gives a bibliographical review of the finite element and boundary element parallel processing techniques from the theoretical and application points of view. Topics…
Abstract
This paper gives a bibliographical review of the finite element and boundary element parallel processing techniques from the theoretical and application points of view. Topics include: theory – domain decomposition/partitioning, load balancing, parallel solvers/algorithms, parallel mesh generation, adaptive methods, and visualization/graphics; applications – structural mechanics problems, dynamic problems, material/geometrical non‐linear problems, contact problems, fracture mechanics, field problems, coupled problems, sensitivity and optimization, and other problems; hardware and software environments – hardware environments, programming techniques, and software development and presentations. The bibliography at the end of this paper contains 850 references to papers, conference proceedings and theses/dissertations dealing with presented subjects that were published between 1996 and 2002.
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Walid Simmou, Anas Hattabou and Samira Simmou
In Morocco, as in many developing countries, environmental responsibility is not well integrated into corporate management at the operational, tactical, and strategic levels…
Abstract
In Morocco, as in many developing countries, environmental responsibility is not well integrated into corporate management at the operational, tactical, and strategic levels. While the management literature offers a rich body of knowledge on Corporate Social Responsibility (CSR) strategies and practices, less attention has been paid to exploring the complexity of environmental responsibility through the lens of corporate culture. This research aims to address this gap by examining the influence of cultural factors on the deployment of environmental responsibility using Johnson's (2000) model of corporate culture. This model identifies seven components of corporate culture: stories or myths, symbols, power structures, organizational structures, control systems, rituals and routines, and paradigms. Through a Moroccan industrial group case study, this chapter presents the successful deployment of environmental responsibility and describes how managing cultural factors facilitated this transition. This chapter also identifies the unique aspects of the group's culture that allowed redesigning the company's management systems. These insights offer valuable implications for managers and policymakers seeking to improve the environmental performance of large enterprises in developing countries.
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Mahalakshmi, Bharath H, Krishna Koppa and Anitha Nallasivam
The tourism industry is undergoing a metamorphosis as an outcome of the integration of new technologies, which has an impact on products, business experiences, ecosystems and…
Abstract
The tourism industry is undergoing a metamorphosis as an outcome of the integration of new technologies, which has an impact on products, business experiences, ecosystems and tourism complexes. As a result, to adjust to these changes, the sector needs to develop new business alliances, models and skill sets. Emerging technologies such as virtual reality (VR), augmented reality (AR), artificial intelligence (AI), and data analytics are set to bring in a new chapter in the history of travel experiences. Deepening global linkages, optimising operating efficiency, and transforming visitor experiences are all being brought about by these advancements. The report also evaluates the wider effects of this digital revolution, such as the levelling of access to travel information, the introduction of fresh business strategies and the crucial role of cyber security. With practical advice drawn from empirical research, real-world case studies and industry expert interviews, this study prepares businesses and travel destinations for success in the digital age. ‘From Pixels to Paradise’ is an indispensable tool for all those involved in the travel and tourism sector, helping them navigate the digital environment and take advantage of the opportunities brought about by the convergence of travel and technology. This study tries to map out a route towards a more sustainable, engaging and technologically improved tourism experience against the backdrop of significant industry changes.
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Yongsheng Xiao, Lizhen Huang and Jianjiang Zhou
The purpose of this paper is to solve the azimuth sensitivity of a high-resolution range profile (HRRP), which is one of the biggest obstacles faced by a radar automatic target…
Abstract
Purpose
The purpose of this paper is to solve the azimuth sensitivity of a high-resolution range profile (HRRP), which is one of the biggest obstacles faced by a radar automatic target recognition (RATR) system.
Design/methodology/approach
Aimed at addressing the shortcomings of the equal angular-sector segmentation based on the scatterer model, an adaptive angular-sector segmentation is proposed on the basis of grey incidence analysis (GIA).
Findings
The main conclusions reached are as follows. First, the adaptive angular-sector segmentation in terms of GIA is suitable for RATR based on the HRRP; and, second, the adaptive angular-sector segmentation based on the type-B degree of grey incidence model is better than the Deng-Si degree of grey incidence model and the degree of grey slope incidence model.
Practical implications
The outcome obtained in this paper can be selected for the RATR application.
Originality/value
This paper has been built on the basis of previous research achievements, and a new RATR method of adaptive angular-sector segmentation is presented based on the GIA.