A Lanczos Procedure for Efficient Mode Superposition in Dynamic Analysis

2002 ◽  
Author(s):  
Daniel Rixen
Keyword(s):  
Dynamic Analysis ◽  
Mode Superposition ◽  
Lanczos Procedure

The application of the Lanczos Mode Superposition Method in dynamic analysis of offshore structures

1987 ◽  
Vol 25 (4) ◽  
pp. 615-625 ◽  
Author(s):  
Alvaro L.G.A. Coutinho ◽  
Luiz Landau ◽  
Edison C.P. Lima ◽  
Nelson F.F. Ebecken
Keyword(s):  
Dynamic Analysis ◽  
Offshore Structures ◽  
Superposition Method ◽  
Mode Superposition ◽  
Mode Superposition Method

scholarly journals On the Use of Material-Dependent Damping in ANSYS for Mode Superposition Transient Analysis

2011 ◽  
Author(s):  
Jinsuo Nie ◽  
Xing Wei
Keyword(s):  
Dynamic Analysis ◽  
Nuclear Power ◽  
Power Plants ◽  
Superposition Method ◽  
Complex Structures ◽  
Transient Dynamic Analysis ◽  
Transient Dynamic ◽  
Mode Superposition ◽  
Mode Superposition Method ◽  
Dynamic Analyses

The mode superposition method is often used for dynamic analysis of complex structures, such as the seismic Category I structures in nuclear power plants, in place of the less efficient full method, which uses the full system matrices for calculation of the transient responses. In such applications, specification of material-dependent damping is usually desirable because complex structures can consist of multiple types of materials that may have different energy dissipation capabilities. A recent review of the ANSYS manual for several releases found that the use of material-dependent damping is not clearly explained for performing a mode superposition transient dynamic analysis. This paper includes several mode superposition transient dynamic analyses using different ways to specify damping in ANSYS, in order to determine how material-dependent damping can be specified conveniently in a mode superposition transient dynamic analysis.

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