Event Archive

A higher gradient theory for solid mixtures and its application to microelectronic materials

Rotational Motion of Pendula Systems for Wave Energy Extraction

The main aim of this work is to investigate different planar base excitation schemes, with respect to energy extraction from a mechanical pendulum. Focus is placed on how each forcing configuration affects the stable rotational motion or stability boundaries associated with stable rotations.

Near Grazing Dynamics of Piecewise Linear Oscillators

Impacts in mechanical systems are ubiquitous. These can be intrinsic; such as suspension cables in bridges acting as one-sided springs, unintentional; such as lateral 'Hunting' motions of trains causing loss of contact with the track, a result of wear or manufacturing errors; such as dead zones or gear rattles or...

Nonlinear Dynamics and control of an Autoparametric System with a Pendulum

Vibrations of an autoparametric system, composed of nonlinear mechanical oscillator with an attached damped pendulum, around 1:2 resonance region, are investigated in this work.

Hysteretic effects in dry friction: Experiment and Modeling

New type of static friction model containing hysteresis is presented.

The interaction of silicon design and progress in communications technologies

A talk on the interaction of silicon design and progress in communications technologies, particularly mobile/wireless devices. Prof Boeck is a member of staff at Berlin University. Georg will be accompanied by Dr Frank Henkel of IMSL. Frank has been involved in a large number of EC funded...

Localised buckling, writhing and cutting of the DNA molecule

Single–molecule tests on DNA in a magnetic tweezer experiment allow the molecule to be stretched and twisted. Under increasing twist the DNA buckles locally and forms a ply (plectoneme) which grows at right–angles to the loading axis. Interpreting this in terms of elastic–rod theory allows the estimation of important parameters...

Experiments on VIV under frequency modulation and at constant Reynold number

Normal vibration modes of a slender beam on elastic foundation with unilateral contact

Nonlinear normal vibration modes of a semi-infinite slender beam on elastic foundation with unilateral contact are addressed using the method of multiple scales.

Experimental unfolding and theoretical model in the transition to complex dynamic of a sagged cable

A good correlation between the experiments and theory allowed to unfold the complex forced dynamics of a sagged cable triggered by a divergence-Hopf codimension two bifurcation.