scholarly journals Estimation of Pipeline.Soil Interaction Force for the Response Analysis of Buried Pipeline

2003 ◽  
Vol 7 (3) ◽  
pp. 57-67 ◽  
Keyword(s):  
Interaction Force ◽  
Response Analysis ◽  
Buried Pipeline

Free and Forced Response of an Axially Moving String Transporting a Damped Linear Oscillator

1993 ◽  
Author(s):  
W. D. Zhu ◽  
C. D. Mote
Keyword(s):  
Initial Conditions ◽  
Numerical Algorithms ◽  
Time History ◽  
Coupled System ◽  
Interaction Force ◽  
Forced Response ◽  
Linear Oscillator ◽  
Response Analysis ◽  
History Of ◽  
Axially Moving

Abstract The transverse response of a cable transport system, which is modelled as an ideal, constant tension string travelling at constant speed between two supports with a damped linear oscillator attached to it, is predicted for arbitrary initial conditions, external forces and boundary excitations. The exact formulation of the coupled system reduces to a single integral equation of Volterra type governing the interaction force between the string and the payload oscillator. The time history of the interaction force is discontinuous for non-vanishing damping of the oscillator. These discontinuities occur at the instants when transverse waves propagating along the string interact with the oscillator. The discontinuities are treated using the theory of distributions. Numerical algorithms for computing the integrals involving generalized functions and for solution of the delay-integral-differential equation are developed. Response analysis shows a discontinuous velocity history of the payload attachment point. Special conditions leading to absence of the discontinuities above are given.

Response Analysis of Buried Pipeline Subjected to Fault Movements

ICPTT 2009 ◽  
2009 ◽  
Author(s):  
Zhongliang Jiao ◽  
Jian Shuai ◽  
Kejiang Han
Keyword(s):  
Response Analysis ◽  
Buried Pipeline

Isolation Mechanism and Method for Buried Segmental Pipeline under Earhquake-Induced Large Displacement

2011 ◽  
Vol 99-100 ◽  
pp. 410-413
Author(s):  
Ai Ping Tang ◽  
Ai Hua Wen ◽  
Li Hua Gai ◽  
Ru Hong Zhong
Keyword(s):  
Slope Failure ◽  
Soil Types ◽  
Response Analysis ◽  
Buried Pipeline ◽  
Soil Slope ◽  
Seismic Response Analysis ◽  
Ground Displacement ◽  
Isolation System ◽  
Reliable Isolation ◽  
Rock And Soil

This paper deals with an isolation design methods of buried segment pipeline for large ground displacement in earthquake. The buried pipeline is always damaged due to the strong shaking and earthquake-induced large or permant ground displacement and deformation (PGD), including liquefaction, rock and soil slope failure, fault and fissure. Based on the seismic response analysis for buried segment pipeline, the isolation mechanism and an equipment for resisting ground displacement trigged by liquefaction and fault is presented in this paper. Some related parameters to isolation system like stiffness and damp of isolator, soil types and its displacement, depth of pipeline, are discussed for developing a reliable isolation system fitting the buried segment pipeline.

Analytical and Experimental Frequency Response Analysis of Microcantilevers Subject to Tip-Sample Interaction

2009 ◽  
Author(s):  
Aidin Delnavaz ◽  
S. Nima Mahmoodi ◽  
Nader Jalili ◽  
Hassan Zohoor
Keyword(s):  
Water Layer ◽  
Interaction Force ◽  
Attraction Domain ◽  
Multiple Time Scales ◽  
Response Analysis ◽  
Multiple Time ◽  
Sensors And Actuators ◽  
Experimental Frequency ◽  
Widespread Application ◽  
Experimental Findings

Improvement of microcantilever-based sensors and actuators chiefly depends on how comprehensively they are modeled and precisely formulated. Atomic Force Microscopy (AFM) is the most widespread application of microcantilever beam as a sensor, which is usually influenced by the tip-sample interaction force. For this, vibration of AFM microcantilever probe is analyzed in this paper, along with analytical, numerical and experimental investigation of the influence of the sample interaction force on the microcantilever vibration. Nonlinear integro-partial equation of microcantilever vibration subject to the tip-sample interaction is then derived and numerically simulated. Moreover, multiple time scales method is utilized to estimate the tip amplitude while it is vibrating near the sample. An experimental setup is developed using AFM in order to validate the theoretical and simulation results. Hysteresis, instability and amplitude drop can be identified in the experimental curves inside the particle attraction domain. These are likely related to the interaction force between the tip and sample as well as the presence of the water layer during the experiments. A fair agreement is observed between the theoretical analysis, numerical simulation and experimental findings which obviously demonstrates the effectiveness and applicability of the developed model.

A Dose-Response Analysis of Nicotine Sensitization in Adolescent Rats D2-Primed as Neonates

2010 ◽  
Author(s):  
Elizabeth A. Hanchak ◽  
Meredith L. Smith ◽  
Jessie J. Smith ◽  
Marla K. Perna ◽  
Russell W. Brown
Keyword(s):  
Dose Response ◽  
Response Analysis ◽  
Adolescent Rats
Sign in / Sign up

Export Citation Format

Share Document