Dynamic Analysis of Flapper/Nozzle Electrohydraulic Servovalve Considering the Influence of the First-Stage Parameters

2014 ◽  
Vol 687-691 ◽  
pp. 316-321
Author(s):  
Wei Zhang ◽  
Song Jing Li
Keyword(s):  
Dynamic Response ◽  
Dynamic Analysis ◽  
Simulation Model ◽  
Discharge Coefficient ◽  
Mathematic Model ◽  
Viscous Damping ◽  
Response Characteristics ◽  
The Past ◽  
Simulation Results ◽  
Dynamic Response Characteristics

The mathematic model of flapper/nozzle electrohydraulic servovalves is rearranged, many factors are reconsidered which have been omitted in the past analysis which are for the purposes of convenience or on the assumption that they are of no particular significance. According to the rearranged mathematic model, the simulation model of the servovalve is established using the Matlab/simulink software, dynamic response characteristics of the servovalve is simulated when the parameters of the discharge coefficient of nozzles and the viscous damping constant of torque motor and flapper are changed. Simulation results show that the change of the parameters influence the dynamic response of the spool displacement.

The Dynamic Response of Zhengyangmen Gate Tower Induced by Beijing Metro Line 2

2014 ◽  
Vol 580-583 ◽  
pp. 1212-1217
Author(s):  
Qi Song ◽  
Jia Qi Guo ◽  
Wen Hua Chen ◽  
Ping Guo
Keyword(s):  
Dynamic Response ◽  
Dynamic Analysis ◽  
Test Data ◽  
Vibration Test ◽  
Analysis Model ◽  
Response Characteristics ◽  
The North ◽  
Cultural Relic ◽  
Dynamic Response Characteristics ◽  
South Axis

Zhengyangmen gate tower is a national emphasis cultural relic unit along the north-south axis of Beijing, which is above the Beijing metro line 2. Based on dynamic analysis model of gate tower and the position of gate tower and subway, the dynamic response characteristics of gate tower induced by Beijing metro line 2 are calculated, and compared with the in-site vibration test data.

The Simulation about Collision of the Truck Fence

2010 ◽  
Vol 139-141 ◽  
pp. 1052-1055 ◽  
Author(s):  
Yu Bao Zhang ◽  
En Hui Zhang
Keyword(s):  
Kinetic Energy ◽  
Dynamic Response ◽  
Occupant Safety ◽  
Response Characteristics ◽  
Deformation Velocity ◽  
Simulation Results ◽  
Dynamic Response Characteristics ◽  
Improved Model

The collision characteristics of the truck fences are very important to occupant safety in car, when the car’s front collisions the tail of truck. This study is a kind of the truck fence structure and simulates its crash. First, simulates the original truck guards. Second, improves the truck fence, and the truck fence is simulated by ANSYS / LS-DYNA. Finally, the simulation results and unimproved simulation results are compared. The results show that the dynamic response characteristics (deformation, velocity and acceleration) and the absorb energy (interna energy and kinetic energy) of the improved model are significantly enhanced.

Intracellular Dynamic Response Characteristics of Pineal Photoreceptors

1984 ◽  
Vol 16 (1-2) ◽  
pp. 119-122
Author(s):  
Y. Morit ◽  
K. Segi ◽  
M. Samejima ◽  
T. Nakamura
Keyword(s):  
Dynamic Response ◽  
Response Characteristics ◽  
Dynamic Response Characteristics ◽  
Pineal Photoreceptors ◽  
Intracellular Dynamic

Dynamic response characteristics of the plynlimon catchments and preliminary analysis of relationships to physical descriptors

1995 ◽  
Vol 6 (5) ◽  
pp. 465-472 ◽  
Author(s):  
C. E. M. Sefton ◽  
P. G. Whitehead ◽  
A. Eatherall ◽  
I. G. Littlewood ◽  
A. J. Jakeman
Keyword(s):  
Dynamic Response ◽  
Preliminary Analysis ◽  
Response Characteristics ◽  
Dynamic Response Characteristics

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

2012 ◽  
Vol 499 ◽  
pp. 238-242
Author(s):  
Li Zhang ◽  
Hong Wu ◽  
Yan Jue Gong ◽  
Shuo Zhang
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Modal Analysis ◽  
Natural Frequency ◽  
High Precision ◽  
3D Model ◽  
Finite Element Models ◽  
Dynamics Analysis ◽  
Response Characteristics ◽  
Dynamic Response Characteristics

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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