Linear and nonlinear analyses of a wideband gyro-TWT

1989 ◽  
Vol 36 (4) ◽  
pp. 802-810 ◽  
Author(s):  
B.R. Cheo ◽  
A. Rekiouak
Keyword(s):  
Nonlinear Analyses ◽  
Linear And Nonlinear

Analysis of Straight-Line Motion of Towed Ships

1991 ◽  
Vol 35 (04) ◽  
pp. 304-313
Author(s):  
Fotis Andrea Papoulias
Keyword(s):  
Dynamic Response ◽  
Periodic Solutions ◽  
Bifurcation Theory ◽  
Loss Of Stability ◽  
Nonlinear Analyses ◽  
Surface Ship ◽  
Numerical Integrations ◽  
Straight Line ◽  
Linear And Nonlinear ◽  
Dynamic Loss

The problem of dynamic loss of stability in steady towing of a surface ship is considered. The two coordinates of the towing point and the towline length are the main bifurcation parameters. Bifurcation theory techniques are used in order to compute equilibrium and periodic solutions. The results are confirmed by numerical integrations. It is shown that both linear and nonlinear analyses are required to thoroughly understand, predict, and evaluate the system dynamic response.

Analysis of the Effective Seismic Support Damping in a Class I Piping System

2008 ◽  
Author(s):  
Nima Zobeiry ◽  
Wolf Reinhardt
Keyword(s):  
Response Spectrum ◽  
Time History ◽  
Class I ◽  
Piping System ◽  
Nonlinear Analyses ◽  
Response Spectrum Analysis ◽  
Specific Support ◽  
The Subject ◽  
Linear And Nonlinear ◽  
The Relationship

Based in the existing literature, it is understood that the supports strongly influence the behaviour of piping during earthquake. Given that the level of seismic dissipation depends on the specific support system, the subject of effective damping provided by seismic supports has not been widely explored. This paper investigates this issue for the feeder pipes of a CANDU® reactor. Feeders are numerous class I pipes in parallel, which are separated by frictional spacer elements. The piping system is analyzed using the time history method, taking into account the different damping mechanisms present. By comparing this and a response spectrum analysis of piping, the effective damping in the system is deduced. The effect of specific parameters on the results and the relationship between linear and nonlinear analyses are discussed.

scholarly journals Vowel harmony in Klao linear and nonlinear analyses

1983 ◽  
Vol 14 (1) ◽  
pp. 1-33
Author(s):  
John Victor Singler
Keyword(s):  
Special Interest ◽  
Vowel Harmony ◽  
The Other ◽  
Nonlinear Analyses ◽  
Counter Example ◽  
Linear And Nonlinear ◽  
Pharyngeal Constriction ◽  
Made In

Klao, a Kru language spoken in Liberia, has a nine-vowel system. Like most other Kru languages, it displays harmony sensitive to pharyngeal constriction (tongue-root retraction). What gives the Klao vowel-harmony system special interest is the fact that a great deal of variation occurs, suggesting that vowel harmony is in some way optional. This provides a counter-example to the claim (made in Clements [1977l) that root-controlled vowel harmony is always obligatory. Given this optionality, the question arises as to which model best captures the facts of Klao vowel harmony. 'l,w frameworks are considered: one, along the lines of Anderson [1930], treats vowel harmony as one more assimilation rule, and the other, following the model found in Clements [1981] handles vowel harmony autosegmentally.

Ambient Vibration-Based System Identification of a Medieval Masonry Bastion for Health Assessment using Nonlinear Analyses

2018 ◽  
Vol 19 (2) ◽  
pp. 107-124 ◽  
Author(s):  
Ahmet Can Altunişik ◽  
Ali Fuat Genç ◽  
Murat Günaydin ◽  
Süleyman Adanur ◽  
Fatih Yesevi Okur
Keyword(s):  
Finite Element ◽  
System Identification ◽  
Frequency Domain ◽  
Dynamic Characteristics ◽  
Health Assessment ◽  
Ambient Vibration ◽  
Earthquake Ground Motion ◽  
Nonlinear Analyses ◽  
Exterior Surface ◽  
Linear And Nonlinear

AbstractEarthquakes have underlined the need for health monitoring and safety assessment of engineering structures in general and especially historical heritage. These structures can be exposed to many different loads such as earthquake and wind that may cause the deterioration and loss of structural integrity. In this study, ambient vibration-based system identification of Zağanos Bastion is carried out for health assessment using linear and nonlinear analyses. 3D finite element analyses of the bastion are performed using relievo drawings and analytical dynamic characteristics are obtained. Ambient vibration tests are conducted on the bastion and experimental dynamic characteristics such as natural frequencies, mode shapes and damping ratios are determined. Enhanced Frequency Domain Decomposition Method in the frequency domain and Stochastic Subspace Identification Method in the time domain are used to extract the experimental dynamic characteristics. Maximum differences are minimized using some uncertain parameters to obtain the updated finite element model. Linear and nonlinear time history analyses are carried out using 1999 Kocaeli earthquake ground motion record to display the maximum displacements, stresses and local damage regions with detail. This study suggests that minor damage at the connection points and exterior surface will sustain under destructive earthquakes.

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