Ortho-planar linear-motion springs

Planar analysis of a quasi-zero stiffness mechanism using inclined linear springs

Negative stiffness mechanisms have seen renewed attention in recent years for their ability to reduce the resonance frequency of a structure without impeding their load-bearing ability. Such devices are often described as having quasi-zero stiffness when the negative stiffness is tuned to reduce the overall stiffness of the system as close to zero as possible without creating an instability. Th...

chaotic motion and its control for a non-planar non-linear cantilever beam with parametric excitation

in this paper, chaotic motion analysis and its control for a non-planar non-linear cantilever beam with axial and lateral parametric excitation in the free end is accomplished. this is a new method for control of chaotic motion of a non-linear planar beam. in this survey, internal resonance of the beam is 2:1 and the initial resonance is in the outside of plane and it is assumed a sub-resonance...

Planar Motion

Dynamic extension-contraction motion in supramolecular springs.

One of the most significant recent highlights in the field of supramolecular polymer chemistry is the development of folded helical structures which are important modules in the engineering of functional nanoobjects such as nanotubes, nanowires, and nanomachines.1 In particular, helical architecture that undergoes conformational changes triggered by external stimuli has received attractive atte...

Particles held by springs in a linear shear flow exhibit oscillatory motion.

The dynamics of small spheres that are held by linear springs in a low Reynolds number shear flow at neighboring locations is investigated. The flow elongates the beads, and the interplay of the shear gradient with the nonlinear behavior of the hydrodynamic interaction among the spheres causes in a large range of parameters a bifurcation to a surprising oscillatory bead motion. The parameter ra...