An implicit time integration scheme for inelastic constitutive equations with internal state variables

1986 ◽  
Vol 23 (4) ◽  
pp. 533-554 ◽  
Author(s):  
Detlef Cordts ◽  
Franz G. Kollmann
Keyword(s):  
Constitutive Equations ◽  
Internal State ◽  
Time Integration ◽  
Implicit Time ◽  
Integration Scheme ◽  
State Variables ◽  
Internal State Variables ◽  
Implicit Time Integration ◽  
Time Integration Scheme

Dynamics of Disconnected Risers Under Rigid and Compliant Hang-Off

1990 ◽  
Vol 112 (2) ◽  
pp. 106-114
Author(s):  
N. M. Patrikalakis ◽  
D. Y. Yoon
Keyword(s):  
Efficient Solution ◽  
Time Integration ◽  
Implicit Time ◽  
Integration Scheme ◽  
Nonuniform Grid ◽  
Implicit Time Integration ◽  
Time Integration Scheme ◽  
Type Response ◽  
Nonlinear Motions ◽  
Excitation Conditions

An efficient solution scheme to simulate the nonlinear motions of hanging risers based on an adaptive nonuniform grid finite difference method and an implicit time integration scheme is presented. Dynamic buckling-type response of hanging risers under rigid hang-off due to heave acceleration of the support platform in extreme excitation conditions is studied, and the important parameters affecting the response are identified. Significant reduction of motions and resulting stresses is obtained by employing compliant hang-off.

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