Hydro-elastic analysis of standing submerged structures under seismic excitations with SPH-FEM approach

Demir, Abdullah

doi:10.1590/1679-78256266

Cited by 8 publications

(1 citation statement)

References 37 publications

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“…It is important to emphasize that in enhancing the site selection process, it is prudent to refine the chosen locations by incorporating natural hazard assessments. This can be achieved through the application of numerical methods [55][56][57], which specifically focus on seismic activities. Additionally, considerations should extend to factors such as erosion and flood risks [37], as well as potential landslides and debris flows [58].…”

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confidence: 99%

A Novel Procedure for the AHP Method for the Site Selection of Solar PV Farms

Demir,

Dinçer,

Yılmaz

2024

International Journal of Energy Research

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This study proposes a novel approach to enhance the analytic hierarchy process (AHP) for the selection of suitable sites for solar photovoltaic (PV) farms. This approach is particularly beneficial when it is possible to establish a predefined objective relation in the final weights of the AHP method. The methodology focuses on achieving this predefined relation introducing a systematic revision of the constants of related constraints. In this study, the costs of constructing a unit transmission line and road in the Kayseri Province are objectively related, and the initial constant matrix of the AHP method is iteratively revised until the relation of the final weights converges to the predefined one. The suitability of solar PV farm locations is classified into five classes, revealing approximately 28% (40-100% of suitability) of the province as favorably suitable and designating about 67% as restricted zones. The findings reveal notable distinctions between the revised weights and those derived from the conventional AHP method. The disparity in weights for various constraints varies from 13.5% to 7.2%. Consequently, the alterations in the area of suitability regions range from 3.4% to 50%. The revision of AHP weights results in a reduction in higher-suitability areas, coupled with a significant expansion in the region exhibiting lower suitability. Notably, the extent of change in the suitability map increases when the difference in ratios between two criteria obtained from the AHP and the predefined objective relation is high. The proposed method demonstrates its applicability in regions like Kayseri where an objective relation between criteria can be established. Given the inherent subjectivity of the AHP method, the proposed procedure becomes essential to attain more objective weights. Since the methodology objectively adjusts weights based on known ratios, it increases the accuracy and reliability of site selection studies.

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Section: 1mentioning

confidence: 99%

A Novel Procedure for the AHP Method for the Site Selection of Solar PV Farms

Demir,

Dinçer,

Yılmaz

2024

International Journal of Energy Research

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A Fully Coupled Numerical Model for Unbonded Post-tensioned Timber Structures

Dinçer,

Demir

2024

Eur. J. Wood Prod.

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The paper presents a fully Lagrangian mesh-free solver to simulate the dynamic behavior of post-tensioned timber structures. Weakly Compressible Smoothed Particle Hydrodynamics (SPH) is employed to model both the timber and the tendon. An efficient and simple coupling method between the timber and the tendon is proposed by considering the numerical stability. Besides, the same coupling algorithm is used to model the interaction between column and beam elements. Although the column is treated as rigid in the simulations, the coupling algorithm accounts for the initial compression of the column resulting from post-tensioning. For the verification of the code for solids and material nonlinearity of timber, benchmark problems available in the literature are used. Finally, the solver's capability is demonstrated through dynamic analysis of post-tensioned timber structures. The solutions obtained for all the cases are in good agreement with the experimental and theoretical data, which indicates the applicability and accuracy of the solver.

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Wind farm site selection using GIS-based multicriteria analysis with Life cycle assessment integration

Demir,

Dinçer,

Çiftçi

et al. 2024

Earth Sci Inform

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The sustainability of wind power plants depends on the selection of suitable installation locations, which should consider not only economic and technical factors including manufacturing and raw materials, but also issues pertaining to the environment. In the present study, a novel methodology is proposed to determine the suitable locations for wind turbine farms by analyzing from the environmental perspective. In the methodology, the life cycle assessment (LCA) of wind turbines is incorporated into the decision process. The criteria are ranked using analytical hierarchy process (AHP). The study area is chosen as the western region of Türkiye. The obtained suitability map reveals that wind speed is not the sole criterion for selecting a site for wind turbine farms; other factors, such as bird migration paths, distance from urban areas and land use, are also crucial. The results also reveal that constructing wind power plants in the vicinity of İzmir, Çanakkale, Istanbul, and Balıkesir in Türkiye can lead to a reduction in emissions. İzmir and its surrounding area show the best environmental performance with the lowest CO2 per kilowatt-hour (7.14 g CO2 eq/kWh), to install a wind turbine due to its proximity to the harbor and steel factory across the study area. Çanakkale and the northwest region of Türkiye, despite having high wind speeds, are less environmentally favorable than İzmir, Balıkesir, and Istanbul. The findings of LCA reveal that the nacelle and rotor components of the wind turbine contribute significantly (43–97%) to the environmental impact categories studied, while the tower component (0–36%) also has an impact.

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Hydro-elastic analysis of standing submerged structures under seismic excitations with SPH-FEM approach

Cited by 8 publications

References 37 publications

A Novel Procedure for the AHP Method for the Site Selection of Solar PV Farms

A Novel Procedure for the AHP Method for the Site Selection of Solar PV Farms

A Fully Coupled Numerical Model for Unbonded Post-tensioned Timber Structures

Wind farm site selection using GIS-based multicriteria analysis with Life cycle assessment integration

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