Important International Journal Publications in 2020 in the field of computational wind engineering and bridge aerodynamics
The assessment of wind-induced vibrations is considered vital for designing important civil engineering structures such as long-span bridges and tall towers. In this regard, the published journal articles contribute significantly to the development of hybrid aerodynamic models using artificial neural networks, an extension of vortex particle methods for aeroelastic interaction of thin-walled systems, quantitative assessment of existing aerodynamic force models, and framework for single and multi-objective shape optimization in bridge aerodynamics.
Prediction of aeroelastic response of bridge decks using artificial neural networks
Link: https://doi.org/10.1016/j.compstruc.2020.106198
A methodological framework is developed for robust and efficient prediction strategies for complex aerodynamic phenomena using hybrid models that employ numerical analyses as well as meta-models. Here, an approach to predict motion-induced aerodynamic forces is developed using an artificial neural network (ANN). The input to the ANN is the response time histories of a bridge section, whereas the output is the motion-induced forces. The proposed methodology has wide application in the analysis and design of long-span bridges.
An extension of pseudo-3D vortex particle methods for aeroelastic interactions
Link: https://doi.org/10.1016/j.jweia.2020.104391
Accurate prediction of interaction between fluid flow and moving deformed body is a challenging multi-physics problem. A new extension of vortex particle methods (VPM) is developed, which is in the context of a pseudo-three-dimensional (pseudo-3D) multi-slice coupled model for complex fluid-structure interaction of thin-walled structures. The coupled model allows analysing aeroelastic interactions of thin- flexible shell systems such as membrane roofs and chimneys.
Comparison Metrics for Time-Histories: Application to Bridge Aerodynamics
Link: https://doi.org/10.1061/(ASCE)EM.1943-7889.0001811
A significant number of aerodynamic force models are used to assess the performance of bridges that indicates an important question regarding their comparison and validation. This study utilizes a unified set of metrics for a quantitative comparison of time-histories in bridge aerodynamics with a host of characteristics. The outcome of the study is intended to provide a framework for quantitative comparison and validation of aerodynamic models based on the underlying physics of fluid-structure interaction.
Single and multi-objective shape optimization of streamlined bridge decks
Link:https://doi.org/10.1007/s00158-019-02431-3
Shape optimization of tall buildings and bridge cross-sections is still an open and inspiring research field. The paper presents a framework for single and multi-objective shape optimization of static aerodynamic forces for a streamlined box section. Computational fluid dynamic simulation based on the vortex particle method provides the quantities of interest approximately treated by a Kriging surrogate for the optimization.