Time Inversion of Physical Quantity and Physical Equation

2019 ◽  
Vol 09 (03) ◽  
pp. 162-175
Author(s):  
大庆 李
Keyword(s):  
Physical Quantity ◽  
Time Inversion ◽  
Physical Equation

2-D crustal Poisson’s ratio from seismic travel time inversion in Changbaishan Tianchi volcanic region

2005 ◽  
Vol 18 (3) ◽  
pp. 345-353 ◽  
Author(s):  
Zhi Liu ◽  
Xian-kang Zhang ◽  
Fu-yun Wang ◽  
Yong-hong Duan ◽  
Xiao-ling Lai
Keyword(s):  
Travel Time ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Time Inversion ◽  
Volcanic Region ◽  
Travel Time Inversion

Penalty Method Involving Electric Sliding Contact Problem

2014 ◽  
Vol 701-702 ◽  
pp. 246-249
Author(s):  
Sai Tan ◽  
Jun Yong Lu ◽  
Xin Lin Long ◽  
Xiao Zhang
Keyword(s):  
Finite Element ◽  
Contact Problem ◽  
Physical Quantity ◽  
Penalty Method ◽  
Sliding Contact ◽  
Interface Condition ◽  
Calculation Results ◽  
Coupled Equation ◽  
Finite Element Formulations ◽  
Methods Numerical

Basing on governing Maxwell and energy equation of rail gun considering armature movement in two dimension, The total domain to be solved is divided into two subdomains: moving (armature) part and static (rail) part, finite element formulations of two subdomains are built independently, then using the interface condition of two subdomains, formulations are connected by coupled equation which is derived out by penalty method. Shifted physical quantity is used to simulate movement. The final magnetic-thermal coupled fields finite element formulations of rail gun are established by these methods. Numerical calculation results compared by theoretical and other numerical results verify that penalty method is an effective way to deal with electric sliding contact problem associating with Shifted physical quantity method.

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