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structural dynamics

Giorgio Carta's picture

A phononic band gap model for long bridges. The ‘Brabau’ bridge case

In this paper, we study the dynamic flexural behaviour of a long bridge, modelled as an infinite periodic structure. The analysis is applied to the ‘Brabau’ bridge across the river Tirso in Italy. The approach reduces to a spectral problem leading to the analytical expression of the dispersion relation, which provides the ranges of frequencies for which waves do and do not propagate. The contributions of the bridge structural elements on the dispersive properties of the structure are investigated in detail.

Bhisham Sharma's picture

PhD position in Mechanics and Dynamics at Wichita State University

A funded PhD position is open for summer or fall 2017 in the Mechanics and Dynamics Laboratory in the Department of Aerospace Engineering at Wichita State University. The research program will focus on the design and development of mechanical metamaterials, their application towards aerospace structures, and will involve a combination of analytical, numerical, and experimental methods. The candidate must have a MS in Aerospace or Mechanical Engineering and a strong background in structural mechanics and dynamics.

Flavio Stochino's picture

RC beams under blast load: Reliability and sensitivity analysis

The effects of blast loading on structures can be very dangerous: damages and failures are expected with serious threats to structural safety and human life. Materials stresses and strains are often pushed to the limit and the modelling of these phenomena can be very complex. In order to design blast-resistant structures it is very important to determine what are the key parameters of this problem.

 

Flavio Stochino's picture

What is the importance of strain rate on structural response under blast load?

What is the importance of strain rate on structural response under blast load?

This and other issues are discussed in the recent paper from Stochino F. and Carta G.:

“SDOF models for reinforced concrete beams under impulsive loads accounting for strain rate effects”, DOI: 10.1016/j.nucengdes.2014.05.022, Nuclear Engineering and Design 276, (2014), 74-86.

Chris W Smith's picture

Chair in Structural Dynamics

Chair in Aerospace Structural Dynamics, University of Exeter

The University of Exeter is seeking a full Professor in the field of Aerospace Structural Dynamics.

Julian J. Rimoli's picture

Faculty Positions in Solid Mechanics, Structural Dynamics & Aeroelasticity at the Georgia Institute of Technology

The School of Aerospace Engineering at Georgia Institute of Technology invites nominations and applications for two faculty positions in the areas of solid mechanics, structural dynamics, and aeroelasticity.  Appointments at all ranks will be considered. While candidates in all related areas of research will be considered, candidates with a strong experimental background are particularly sought.

Chris W Smith's picture

New Chairs at University of Exeter

The University of Exeter will shortly announce several new chairs it is seeking to fill.

The chairs are full tenured chairs and in the following areas -

Cell Mechanics (two chairs, one nominally experimental and one nominally theoretical).

Structural Dynamics, possibly with an aerospace flavour.

If you are interested, or know someone who might be, please contact me (c.w.smith-at-exeter.ac.uk) for an informal discussion.

Regards,

Chris Smith

 

ABAQUS/CAE - How can I model a two-storey shear frame with rigid floors and LUMPED masses?

Choose a channel featured in the header of iMechanica: 

This would seem like a simple task. Anyhow, I am having some trouble.

 Problem description: I want to model a two-storey shear frame with rigid floors and lumped masses? I.e., in all its simplicity, a two-DOF system ignoring the mass of the columns and lumping the mass at the two rigid floor beams. A typical example in all books on structural dynamics.

 The columns are modelled with B23-elements while the floors are chosen as analytically rigid parts. I have used 'special - intertia - point masses' to simulate the lumped mass at the reference point of the floors.

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