Ainara Pradera-Mallabiabarrena

• PhD
• Researcher at Universidad de Navarra - Tecnun

Steel cylindrical shell structures such as silos and tanks are very sensitive to geometric imperfections and prone to a plastic instability failure known as elephant's foot (EF) buckling. This type of buckling arises under axial compression. The aim of this paper is to explore the plastic collapse response in conical shells with low semi-vertex ang...

The air spring is the main part of the secondary suspension of passenger railway vehicles. The aim of this paper is to review existing modelling techniques for air springs in order to check if challenges set in the past decade for available models have been met. The advantages and disadvantages of different air spring models (phenomenological/mecha...

As result of the advances made in additive manufacturing in recent years, the design of porous materials with controlled mechanical properties has gained importance due to their capability to offer case-specific solutions in multiple applications. In terms of biomaterials, the use of lattice structures provides a considerable variety of mechanical...

An abdominal aortic aneurysm (AAA) is a permanent focal dilatation of the abdominal aorta of at least 1.5 times its normal diameter. Although the criterion of maximum diameter is still used in clinical practice to decide when to proceed with surgical intervention, numerical studies have demonstrated the importance of other geometric factors. In thi...

This paper deals with a new designed joint system for single-layer spatial structures. As the stability of these structures is greatly influenced by the joint behaviour, the aim of this paper is the characterization of the joint response in bending through Finite Element Method (FEM) analysis using ABAQUS. The behaviour of the joints studied here w...

This paper presents what we call the Multiple Approach Experimental Project (MAEP), a project based on the modelbuilding approach to learning. The MAEP complements theoretical lectures by placing students in a real situation where they design and build a physical structure. A total of 65 students divided into 24 teams voluntarily took part in the c...

The purpose of this paper is to demonstrate that a recently published methodology for predicting flow generated noise by compact surfaces under free-field conditions [1] can be extended to a different and more complex configuration of industrial interest. In the previous paper, the methodology was applied to low Mach number flow past a circular cyl...

Sound generation has been widely studied using numerical hybrid methods. The aim of this paper is to introduce a flexible procedure where the acoustic source data may be synthesized and stored from commercially available Computational Fluid Dynamics (CFD) codes and later used to predict radiated noise. Different applications will require either ana...

Two aspects related to the synthesis of equivalent sources from CFD data for their use in Curle's analogy are investigated in this work. On the one hand, the number of equivalent sources that describe a quadrupolar field can be significantly reduced with respect to the original size of the CFD data, provided that every equivalent quadrupole account...

The aim of this study is the prediction of the aerodynamic noise generated by the fluid flow past a circular cylinder at Re=3900, combining numerical simulation of the fluid flow with an analytical noise evaluation. This case has been extended to the flow around a cylinder with Re=140000. The Large Eddy Simulation (LES) turbulence model of FLUENT v...