Results 11 to 20 of about 257,298 (302)

Shock-induced collapse of a gas bubble in shockwave lithotripsy [PDF]

open access: yes, 2008
The shock-induced collapse of a pre-existing nucleus near a solid surface in the focal region of a lithotripter is investigated. The entire flow field of the collapse of a single gas bubble subjected to a lithotripter pulse is simulated using a high ...
Colonius, Tim, Johnsen, Eric
core   +2 more sources

Study on a Nonlinear Dynamic Model and Its Parameters Determination Method for Half-Sine Programmer

open access: yesXibei Gongye Daxue Xuebao, 2019
A nonlinear dynamic model for describing shock response of half-sine programmer in shock test is constructed, in which many important factors in half-sine programmer such as size, hard nonlinearity, damping and initial impact velocity are considered ...

doaj   +1 more source

Prediction of Shock Wave Velocity Induced by a Combined Millisecond and Nanosecond Laser Based on Convolution Neural Network

open access: yesPhotonics, 2023
The variation of shock-wave velocity with time induced by a millisecond-nanosecond combined pulse laser (CPL) on silicon is investigated. The convolution neural network (CNN) is used to predict the shock-wave velocity induced by a single ns laser and CPL
Jingyi Li   +3 more
doaj   +1 more source

Plastic Deformation in Laser-Induced Shock Compression of Monocrystalline Copper [PDF]

open access: yes, 2002
Copper monocrystals were subjected to shock compression at pressures of 10–60 GPa by a short (3 ns initial) duration laser pulse. Transmission electron microscopy revealed features consistent with previous observations of shock-compressed copper, albeit ...
Boehly, T.   +8 more
core   +1 more source

Holographic recording of fast phenomena [PDF]

open access: yes, 2002
We report on a holographic method for recording fast events whose speed is limited by the laser pulse duration if the recording material has sufficient sensitivity to reliably record a frame of the fast event with a single pulse.
Liu, Zhiwen   +2 more
core   +1 more source

Influence of the shaper parameters on the characteristics of acceleration pulses reproduced by mechatronic shock machines [PDF]

open access: yesE3S Web of Conferences, 2021
In this paper the influence of the shaper parameters on the characteristics of acceleration pulses (peak value and duration) reproduced on mechatronic shock machines is analyzed.
Shtreker Denis   +2 more
doaj   +1 more source

Research of the echo-impulse method of control of drilled pieces (non-destructive control) [PDF]

open access: yesMATEC Web of Conferences, 2021
The results of field and computational experimental studies of the pulse echo method are presented. Typical reflectograms of bored piles are presented. The factors that complicate the interpretation of control data are noted. An analysis of the formation
Snezhkov Dmitry, Budrevich Neli
doaj   +1 more source

The Shock Characteristics of Tilted Support Spring Packaging System with Critical Components

open access: yesShock and Vibration, 2014
The nonlinear dynamical equations of tilted support spring packaging system with critical components were obtained under the action of half-sine pulse. To evaluate the shock characteristics of the critical components, a new concept of three-dimensional ...
An-Jun Chen
doaj   +1 more source

A Fault Feature Extraction Method for Rolling Bearing Based on Pulse Adaptive Time-Frequency Transform

open access: yesShock and Vibration, 2016
Shock pulse method is a widely used technique for condition monitoring of rolling bearing. However, it may cause erroneous diagnosis in the presence of strong background noise or other shock sources. Aiming at overcoming the shortcoming, a pulse adaptive
Jinbao Yao, Baoping Tang, Jie Zhao
doaj   +1 more source

Shock ion acceleration by an ultrashort circularly polarized laser pulse via relativistic transparency in an exploded target [PDF]

open access: yes, 2015
We investigated ion acceleration by an electrostatic shock in an exploded target irradiated by an ultrashort, circularly polarized laser pulse by means of one- and three-dimensional particle-in-cell simulations.
Cho, Myung-Hoon   +6 more
core   +1 more source

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