Parameter identification method for determination of elastic modulus of rock based on adjoint equation and blasting wave measurements

2009 ◽  
Vol 33 (12) ◽  
pp. 1513-1533 ◽  
Author(s):  
Naoto Koizumi ◽  
Mutsuto Kawahara
Keyword(s):  
Elastic Modulus ◽  
Parameter Identification ◽  
Adjoint Equation ◽  
Identification Method ◽  
Wave Measurements ◽  
Blasting Wave

Parameter Identification of Elastic Modulus of Rock Based on Blasting Waves in Tunnel Excavation

2011 ◽  
Vol 403-408 ◽  
pp. 75-79
Author(s):  
Yuto Motoyama ◽  
Mutsuto Kawahara
Keyword(s):  
Elastic Modulus ◽  
Parameter Identification ◽  
Elastic Moduli ◽  
Adjoint Equation ◽  
Measured Data ◽  
Blasting Vibration ◽  
Tunnel Excavation ◽  
First Order ◽  
Identification Method ◽  
Identification Technique

The objective of this research is to present an identification method for elastic moduli of ground rock, through the first-order adjoint equation method using the measurements of the blasting vibration in tunnel excavation. Parameter identification is a minimization problem of the square sum of discrepancy between the computed and observed velocities. For the identification of these parameters, the magnitudes of the blasting force should be identified beforehand. In this study, propagation of an elastic wave is assumed because the amplitude of such a wave is infinitesimal. After the identification of the blasting force, the elastic moduli of three layers are identified simultaneously. We assume that the damping of vibration is linear. By applying the identification technique at the Ohyorogi tunnel site, we verify that the method is useful for tunnel excavation. Using measured data from actual tunnel excavation sites, the numerical identification method presented in this paper is shown to be useful for practical tunnel excavation.

scholarly journals Parameter identification method of hydraulic automatic gauge control system based on chaotic wolf pack optimization algorithm

AIP Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 055302
Author(s):  
Yong Zhu ◽  
Guangpeng Li ◽  
Shengnan Tang ◽  
Wanlu Jiang ◽  
Zhijian Zheng
Keyword(s):  
Control System ◽  
Parameter Identification ◽  
Optimization Algorithm ◽  
Identification Method ◽  
Automatic Gauge Control

scholarly journals Uncertainty in the determination of elastic modulus by tensile testing

2021 ◽  
Author(s):  
Sonja Kostic ◽  
Jasmina Miljojkovic ◽  
Goran Simunovic ◽  
Djordje Vukelic ◽  
Branko Tadic
Keyword(s):  
Elastic Modulus ◽  
Tensile Testing
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