Time-frequency domain analysis study on dynamic response characteristics of kerosene-fueled scramjet combustor

2017 ◽  
Author(s):  
Xiaobao Han ◽  
Huacong Li ◽  
Qiusheng Jia ◽  
Hongliang Xiao ◽  
Qiang Fu
Keyword(s):  
Dynamic Response ◽  
Frequency Domain ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Analysis Study ◽  
Time Frequency ◽  
Response Characteristics ◽  
Scramjet Combustor ◽  
Dynamic Response Characteristics

scholarly journals Numerical Investigation on Dynamic Response Characteristics and Deformation Mechanism of a Bedded Rock Mass Slope Subject to Earthquake Excitation

2021 ◽  
Vol 11 (15) ◽  
pp. 7068
Author(s):  
Danqing Song ◽  
Zhuo Chen ◽  
Lihu Dong ◽  
Wencheng Zhu
Keyword(s):  
Rock Mass ◽  
Dynamic Response ◽  
Frequency Domain ◽  
Time Domain ◽  
Seismic Analysis ◽  
Domain Analysis ◽  
Response Characteristics ◽  
Geological Conditions ◽  
Dynamic Response Characteristics ◽  
Bedded Rock

In order to systematically reveal the dynamic response characteristics of rock mass slopes subject to seismic excitation, time-domain and frequency-domain analyses are used to investigate the dynamic response of a bedded rock slope from multiple perspectives, using the two-dimensional numerical dynamic analyses. Based on the numerical simulation results, the influence of the weak bedded structural planes on the propagation characteristics of seismic waves in the slope is analyzed. The time-domain analysis suggests that the topographic and geological conditions have an influence on the dynamic response of the slope. The effects of ground motion direction on the dynamic response characteristics of the slope are identified. In addition, according to the frequency-domain analysis, the impacts of slope surface, elevation, and structural plane on the seismic response characteristics of the slope are also clarified. The intrinsic characteristics of the slope are investigated by using Fourier spectral analysis and modal analysis, and the deformation response characteristics of the slope are clarified. The relationship between different natural frequencies of the slope, the predominant frequency of the seismic wave, and the dynamic response characteristics of the slope is discussed. Moreover, the dynamic failure mechanism of the slope is analyzed. This work provides a reference for the seismic analysis of this type of slope.

A Portable Detecting and Analytic Instrument of Vibration Signal

2012 ◽  
Vol 442 ◽  
pp. 305-308
Author(s):  
Jian Wei Li ◽  
Ling Wang ◽  
Hong Mei Zhang
Keyword(s):  
Frequency Domain ◽  
Virtual Instrument ◽  
Vibration Signal ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Time Frequency ◽  
Notebook Computer ◽  
Usb Bus ◽  
Data Acquisition Card

It is often needed in engineering that detecting and analyzing vibration signal of some equipment. To meet the requirement, a portable detecting and analytic instrument was designed using virtual instrument concept. In the instrument, notebook computer was used as the platform of hardware. Vibration signal was obtained by integrated piezoelectric acceleration sensor (DTS0104T), and was transferred to a notebook computer through data acquisition card (NI USB-6210) based on USB bus. The software, running on the notebook computer, was developed under LabVIEW. Vibration signal could be displayed on screen, recorded in disk or printed by printer, retrieved, and analyzed. The analysis functions of the instrument include: time-domain analysis, frequency-domain analysis, time-frequency domain analysis, and correlation analysis. The instrument is compact, portable, powerful, and with friendly interfaces, has broad application prospects.

scholarly journals Diagnosis on Surface Failure in Gear Equipment Using Time - Frequency Domain Analysis

Engineering ◽  
2011 ◽  
Vol 03 (08) ◽  
pp. 851-858 ◽  
Author(s):  
Yuji Ohue ◽  
Toshiya Kounou ◽  
Katsuhiko Yazama
Keyword(s):  
Frequency Domain ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Time Frequency ◽  
Surface Failure
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