In order to suppress the low-frequency vibration of a high-precision instrument, an
orthogonal six-DOFs vibration isolation system with tunable high-static-low-dynamic stiffness …

This paper develops a new solution approach to solve nonlinear forced vibrations of
functionally graded (FG) piezoelectric shells in multi-physics fields. The FG piezoelectric …

Circular cam-roller (CCR) quasi-zero stiffness (QZS) vibration isolators have been
extensively studied. As the CCR isolator can only achieve low stiffness in a very small range …

This study focusses on the vibration transmission and energy flow characteristics of low
dimensional models of dynamical systems with Coulomb friction. The Karnopp friction model …

Although retaining clips are widely used to constrain high-velocity fluid-conveying pipes,
there are few studies on the influence of retaining clips on the supercritical vibration …

The dynamic model of the curved pipes conveying fluid, established by the generalized
Hamiltonian principle, has been widely used to study the vibration properties of pipes with …

As the main cutting unit of Polycrystalline diamond compact (PDC) bit, PDC cutter directly
determines the drilling performance and service life of PDC bit. According to failure analysis …

Gravity effects are generally ignored in the study on the pipe vibration. However, in this
paper, the effect of gravity on the nonlinear vibration of a pipe conveying fluid has been …

The bifurcation-based mass sensor can take advantage of amplitude jumps between
multiple steady states to realize quantitative mass detection and mass warning. Compared …

Horizontal well is one of the main measures to improve oil and gas production capacity.
However, with the extension of horizontal section, the risk of pipe string buckling will be …