Dynamics Analysis of Refrigeration Compressor Based on Finite Element and Experimental Modes

Based on the 3D model of refrigeration's compressor by Pro/E software, the analyses of theoretical and experimental mode are carried out in this paper. The results show that the finite element models of compressor have high precision dynamic response characteristics and the natural frequency of the compressor, based on experimental modal analysis, can be accurately obtained, which will contribute to further dynamic designs of mechanical structures.

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Study on dynamic response characteristics of high and steep layered rock mass slopes using a modal analysis method

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/570/6/062013 ◽

2020 ◽

Vol 570 ◽

pp. 062013

Author(s):

D Q Song ◽

J Huang ◽

X L Liu ◽

E Z Wang ◽

J M Zhang

Keyword(s):

Rock Mass ◽

Dynamic Response ◽

Modal Analysis ◽

Analysis Method ◽

Response Characteristics ◽

Layered Rock ◽

Layered Rock Mass ◽

Dynamic Response Characteristics ◽

Rock Mass Slopes

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Simulation and Analysis on Dynamic Response Characteristics of Six-High Rolling Mill Based on FEM

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.572.154 ◽

2012 ◽

Vol 572 ◽

pp. 154-159

Author(s):

Kai Fu Mi ◽

Jie Zhang ◽

Hong Bo Li ◽

Sheng Hui Jia ◽

Yu Gang Chu

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Working Conditions ◽

Rolling Mill ◽

Finite Element Method Simulation ◽

Finite Element Models ◽

Response Characteristics ◽

Dynamic Response Characteristics ◽

Set Up

The vibration influence on the quality of strip for 2180mm six-high cold tandem rolling mill is discussed. The abnormal frequency of mill is analysis by spot examination. The methods of numerical computation and finite element method simulation by the ANSYS are adopted to set up dynamic model of six-high mill. At the same time, the natural frequency of mill and the response to mill at different excitation is calculated. Comparing the analysis results with the data from the experiment, the finite element models presented in the thesis were proved to be an efficient and valid way to simulate actual working conditions.

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Vibration and Noise Analysis for a Motor of Pure Electric Vehicle

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.915-916.98 ◽

2014 ◽

Vol 915-916 ◽

pp. 98-102 ◽

Cited By ~ 1

Author(s):

Meng Bao ◽

En Wei Chen ◽

Yi Min Lu ◽

Zheng Shi Liu ◽

Shuai Liu

Keyword(s):

Finite Element ◽

Modal Analysis ◽

Electric Vehicle ◽

Natural Frequency ◽

Noise Analysis ◽

Three Dimensional ◽

Time Signal ◽

Element Analysis ◽

Response Characteristics ◽

Coil Winding

To control the pure electric vehicle motors vibration and noise, the dynamic characteristics of the motor are analyzed. Dynamic characteristic include the natural frequency and response characteristics of different parts of the motors structural member. This paper uses three-dimensional software Pro/E modeling of the motor: By making appropriate assumptions and equivalent treatment of the motors stator, rotor core and coil winding, establish the finite element simulation model of the various components .Using the finite element analysis software Workbench analyzes the windings and motor model modal analysis, to get natural frequency of each mode. To make a modal analysis test, we can use hammering method done on the motor. By using real-time signal analyzer AWA6291 make spectral analysis of the motor online, comprehensive comparative analysis of the results and used to guide motor design.

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Dynamic Response Characteristics and Failure Mechanism of Coal Slopes with Weak Intercalated Layers under Blasting Loads

Advances in Civil Engineering ◽

10.1155/2020/5412795 ◽

2020 ◽

Vol 2020 ◽

pp. 1-18

Author(s):

Guang-wei Liu ◽

Dan-qing Song ◽

Zhuo Chen ◽

Ju-wen Yang

Keyword(s):

Dynamic Response ◽

Failure Mechanism ◽

Natural Frequency ◽

Shaking Table ◽

Slope Instability ◽

Dynamic Loads ◽

Blasting Operation ◽

Response Characteristics ◽

Weak Interlayer ◽

Dynamic Response Characteristics

Rock slopes with weak intercalated layers could experience disturbance from various deep mining activities; however, their dynamic stability has not been thoroughly investigated. In this paper, the dynamic response characteristics and failure mechanism of the coal slopes with weak intercalated layers under blasting loads were studied by means of numerical analysis, shaking table tests, and field tests. The effects of dynamic loads with different frequencies on the dynamic response of the slope were analyzed, and the natural frequency of the slope was also determined. The results show that the dynamic amplification effect of the slope is smaller than that of the homogeneous slope, and weak layers weaken the wave propagation in the rock mass. Both experimental and field investigation results show that the slope’s natural frequency was approximately 35 Hz. The slope deformation decreased with the distance of the blasting source. Cracks appear along the weak interlayer firstly under the action of horizontal vibration; then, longitudinal cracks occur at the slope crest. With the increase of dynamic loads, cracks continue expanding, deepening, and penetrating in the main controlled weak interlayer; then, the sliding body presents tensile shear failure along the sliding surface. This study could provide insights into the understanding of the coal slope instability and failure mechanism; this could benefit the blasting operation of the coal slope in fields.

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