TRANSIENT WAVE ENVELOPE ELEMENTS FOR WAVE PROBLEMS

1996 ◽  
Vol 192 (1) ◽  
pp. 245-261 ◽  
Author(s):  
R.J. Astley
Keyword(s):  
Transient Wave ◽  
Wave Problems

A Numerical Method for Predicting the Pressure History of a Sonic Boom Wave Incident on Arbitrarily Oriented Plane Walls

1970 ◽  
Vol 37 (4) ◽  
pp. 889-894 ◽  
Author(s):  
B. M. Rao ◽  
G. W. Zumwalt
Keyword(s):  
Numerical Method ◽  
Three Dimensional ◽  
Artificial Viscosity ◽  
Oklahoma City ◽  
Sonic Boom ◽  
Transient Wave ◽  
Pressure History ◽  
History Of ◽  
Mathematical Foundations ◽  
Wave Problems

The conservation laws for a plane fluid flow were simplified by the weak wave approximations valid for sonic boom-type waves and applied to a field of mesh points, utilizing the “artificial viscosity” concept for numerical stability. The numerical analysis was applied to predict the pressure history of the sonic boom wave on the window of a commercial store building in Oklahoma City which was broken during a sonic boom test in 1964. The results were compared with the results of a two-dimensional analytical method which was developed earlier by the authors and which rests on firm physical and mathematical foundations. Agreement was very good. The numerical method is not limited to plane cases but should be capable of extension to three-dimensional transient wave problems.

STRAIN CHARACTERISTICS OF SOIL AND METHODS OF THEIR DETERMINATION

2018 ◽  
pp. 39-43
Author(s):  
K.S. Sultanov ◽  
P.V. Loginov ◽  
Z.R. Salikhova
Keyword(s):  
Dynamic Loading ◽  
Dynamic Compression ◽  
Loess Soil ◽  
Seismic Loads ◽  
Static Compression ◽  
Plastic Model ◽  
Laboratory Conditions ◽  
Coefficient Of Viscosity ◽  
Wave Problems

The method to define strain characteristics of soil under dynamic loading is proposed based on the results of experiments on dynamic compression of soils on the device for dynamic loading in laboratory conditions; the method allows solving wave problems with the statement similar to the statement of experiments. Using the proposed method, the modulus of dynamic and static compression, the modulus of unloading, the coefficient of viscosity of loess soil in the range of seismic loads are determined in accordance with elastic-visco-plastic model of soil developed by G.M.Lyakhov.

­A Transient Wave of Cellular Senescence is Required for Myofiber Growth and Myonuclear Accretion Following Injury

2020 ◽  
Author(s):  
Laura V. Young ◽  
Alasdair WR Cameron ◽  
Stevan SA Springer ◽  
Joel Ross ◽  
Grant Wolters ◽  
...  
Keyword(s):  
Cellular Senescence ◽  
Transient Wave

Extreme runup events around a ship-shaped floating production, storage and offloading vessel in transient wave groups

2021 ◽  
Vol 911 ◽  
Author(s):  
L.F. Chen ◽  
P.H. Taylor ◽  
D.Z. Ning ◽  
P.W. Cong ◽  
H. Wolgamot ◽  
...  
Keyword(s):  
Transient Wave ◽  
Wave Groups

Abstract

scholarly journals Near-Fault Seismic Response Analysis of Bridges Considering Girder Impact and Pier Size

Mathematics ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 704
Author(s):  
Wenjun An ◽  
Guquan Song ◽  
Shutong Chen
Keyword(s):  
Seismic Response ◽  
Bending Moment ◽  
Expansion Method ◽  
Response Analysis ◽  
Seismic Action ◽  
Transient Wave ◽  
Cross Sectional ◽  
Displacement Response ◽  
Near Fault ◽  
Continuous Girder Bridge

Given the influence of near-fault vertical seismic action, we established a girder-spring-damping-rod model of a double-span continuous girder bridge and used the transient wave function expansion method and indirect modal function method to calculate the seismic response of the bridge. We deduced the theoretical solution for the vertical and longitudinal contact force and displacement response of the bridge structure under the action of the near-fault vertical seismic excitation, and we analyzed the influence of the vertical separation of the bridge on the bending failure of the pier. Our results show that under the action of a near-fault vertical earthquake, pier-girder separation will significantly alter the bridge’s longitudinal displacement response, and that neglecting this separation may lead to the underestimation of the pier’s bending damage. Calculations of the bending moment at the bottom of the pier under different pier heights and cross-sectional diameters showed that the separation of the pier and the girder increases the bending moment at the pier’s base. Therefore, the reasonable design of the pier size and tensile support bearing in near-fault areas may help to reduce longitudinal damage to bridges.

Transient wave-based methods for anomaly detection in fluid pipes: A review

2021 ◽  
Vol 160 ◽  
pp. 107874
Author(s):  
Tong-Chuan Che ◽  
Huan-Feng Duan ◽  
Pedro J. Lee
Keyword(s):  
Anomaly Detection ◽  
Transient Wave
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