Results 21 to 30 of about 264,957 (299)

NON-RIGID KINEMATIC EXCITATION FOR MULTIPLY-SUPPORTED SYSTEM WITH HOMOGENEOUS DAMPING

open access: yesInternational Journal for Computational Civil and Structural Engineering, 2018
This paper continues the discussion of linear equations of motion. The author considers non-rigid kinematic excitation for multiply-supported system leading to the deformations in quasi-static response. It turns out that in the equation of motion written
Alexander G. Tyapin
doaj   +1 more source

Influence of Structural Pseudo-Static Components on Seismic Responses of Low-Medium Speed Maglev Vehicle-Bridge System

open access: yesShanghai Jiaotong Daxue xuebao, 2022
Unlike the traditional seismic analysis on bridge engineering which mainly concerns the relative motion, the seismic analysis of vehicle-bridge system focuses more on the absolute motion of the vehicle system, where the pseudo-static components need to ...
HUANG Fenghua, CHENG Bin, TENG Nianguan
doaj   +1 more source

Enhancement of a High Speed De-Excitation System for Brushless Synchronous Machines by large blocking voltage semiconductors [PDF]

open access: yes, 2015
One of the main disadvantage of the synchronous machines with brushless excitation is that the field winding is not accessible for the de-excitation.
Blánquez Delgado, Francisco   +5 more
core   +1 more source

Nonlinear Frequency Response Analysis of Herringbone Gear Pair based on Incremental Harmonic Balance Method

open access: yesJixie chuandong, 2021
The torsional dynamics model of herringbone gear pair considering time-varying meshing stiffness, constant backlash, dynamic backlash, static transmission error and external dynamic excitation is established. The frequency response characteristics of the
Libang Wang, Hao Dong
doaj  

Electromagnetic Acoustic Detection of Steel Plate Defects Based on High-Energy Pulse Excitation

open access: yesApplied Sciences, 2020
The conventional electromagnetic ultrasonic transducers (EMATs) rely on the static magnetic field created by magnets. The magnet increases the size of the EMATs, and the strong magnetic force of the magnet attracts the detected steel and even ...
Suzhen Liu   +4 more
doaj   +1 more source

A versatile dual spot laser scanning confocal microscopy system for advanced fluorescence correlation spectroscopy analysis in living cell [PDF]

open access: yes, 2009
A fluorescence correlation spectroscopy (FCS) system based on two independent measurement volumes is presented. The optical setup and data acquisition hardware are detailed, as well as a complete protocol to control the location, size and shape of the ...
Aillaud, A.   +5 more
core   +2 more sources

Effect of Parameters on the Design of a Suspension System with Four Oblique Springs

open access: yesShock and Vibration, 2021
This paper presents the fundamental static and dynamic characteristics of a suspension system consisting of four linear springs arranged in an X-shaped configuration to achieve geometric nonlinearity.
Gianluca Gatti
doaj   +1 more source

All-Fiber Pulse-Train Optical Frequency-Domain Interferometer for Dynamic Absolute Distance Measurements of Vibration

open access: yesPhotonics, 2023
In this paper, we propose an all-fiber co-axial optical frequency-domain interferometer (OFDI) in a pulse-train mode with a sample rate of 9 kHz for measuring the vibrations in an internal structure without any contact.
Heli Ma   +10 more
doaj   +1 more source

Frequency response function measurement of a rotor system utilizing electromagnetic excitation by a built-in motor

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2020
In this paper, we propose a practical method for evaluating the robustness and stability of rotating machines. This entails using electromagnetic excitation and measuring the frequency response functions (FRFs) of the rotor system during rotation.
Ren YANG   +4 more
doaj   +1 more source

EVALUATION OF VOLTAGE STABILITY DYNAMIC LOADING MARGIN CONSIDERING THE EFFECT OF LOAD MODELS, EXCITATION SYSTEM PARAMETERS AND REACTIVE POWER GENERATION LIMITS OF GENERATORS WITH A COMBINATION METHOD [PDF]

open access: yesمجله مدل سازی در مهندسی, 2010
Nowadays, Voltage stability is an important types of power system stabilities. To analysis of voltage stability, different static and dynamic boundaries such as maximum Loadability point (MLP) and bifurcation points such as saddle node bifurcation (SNB),
نیما Amjady   +1 more
doaj   +1 more source

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