Influence of viscous damping in the dynamic analysis of an earth dam using simple constitutive models

1996 ◽  
Vol 19 (3) ◽  
pp. 245-263 ◽  
Author(s):  
P.K. Woodward ◽  
D.V. Griffiths
Keyword(s):  
Dynamic Analysis ◽  
Constitutive Models ◽  
Earth Dam ◽  
Viscous Damping

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 EFFECT OF EARTHQUAKE ACCELERATION RECORDS AND THEIR EQUIVALENT DYNAMIC LOADS ON EARTH-DAM RESPONSES

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Sara Mamani ◽  
Siamak Yazdani
Keyword(s):  
Dynamic Analysis ◽  
Performance Indicator ◽  
Earth Dam ◽  
Harmonic Load ◽  
Acceleration Time ◽  
Linear Dynamic ◽  
Earthquake Records ◽  
Acceleration Time Histories ◽  
Non Linear ◽  
Time Histories

This paper studies the dynamic behavior of a typical earth-dam using non-linear dynamic analysis under different earthquake records. One of the most important components in non-linear dynamic analysis of earth-dams is the evaluation of their stability considering the permanent displacement as a performance indicator. Varieties in acceleration time histories coupled with various geometry and heterogeneous material properties of the earth structures lead to diversity in non-linear responses under different real accelerograms. In this study, an equivalent harmonic load related to earthquake records with specific magnitude and frequency is defined and is applied to a 70m tall earth-dam during four real acceleration time histories. The induced-displacements were then measured under each real time record along with their defined harmonic loads at the dam crest. The resulting displacements and their harmonic equivalent loads are compared showing a good agreement in their deformations at the crest. Appropriate parameters including equivalent number of cycles and peak ground acceleration (PGA) for unique equivalent harmonic load were obtained based on the response analyses.

Fully coupled dynamic analysis of an earth dam

Géotechnique ◽  
2011 ◽  
Vol 61 (7) ◽  
pp. 549-563 ◽  
Author(s):  
G. ELIA ◽  
A. AMOROSI ◽  
A.H.C. CHAN ◽  
M.J. KAVVADAS
Keyword(s):  
Dynamic Analysis ◽  
Earth Dam ◽  
Coupled Dynamic Analysis ◽  
Fully Coupled

scholarly journals On the relative merits of simple and advanced constitutive models in dynamic analysis of tunnels

Géotechnique ◽  
2011 ◽  
Vol 61 (10) ◽  
pp. 815-829 ◽  
Author(s):  
S. KONTOE ◽  
L. ZDRAVKOVIC ◽  
D.M. POTTS ◽  
C.O. MENKITI
Keyword(s):  
Dynamic Analysis ◽  
Constitutive Models

scholarly journals Dynamic analysis of earth dam damaged by the 2011 Off the Pacific Coast of Tohoku Earthquake

2014 ◽  
Vol 64 ◽  
pp. 50-62 ◽  
Author(s):  
Bhuddarak Charatpangoon ◽  
Junji Kiyono ◽  
Aiko Furukawa ◽  
Chayanon Hansapinyo
Keyword(s):  
Dynamic Analysis ◽  
Pacific Coast ◽  
Tohoku Earthquake ◽  
Earth Dam ◽  
The Pacific
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