Iteration check list with non-linear elastic soil and non-linear geometric behaviour based on nodes list (Output Table)
The output data table ITCHECS provides data on the accuracy of the calculations performed.
Accuracy data are provided for each pipe node and each soil sub-model: lateral soil reaction, axial soil friction and torsional soil friction.
The parameters LER, FER and TER provide a quick overview on the magnitude of still existing deviations from the theoretical reaction/displacement curve. Deviations are measured on the reaction line through the displacement point calculated. Deviations are expressed in the respective VARAR allowance The parameters LVAR, FVAR and TVAR provide similar information expressed in percentages of the respective curve reaction values. At last the disequilibrium forces in the nodes are provided.
At the end of each iteration a new lateral soil coordinate system is used, such that one of the new axes coincides with the direction of the displacement of the pipe node relative to the soil. The deviation angle between the direction of the lateral soil reaction and the pipe displacement after the last calculated soil iteration is given in the parameter LDEV.
Loadcase name, analysis type, iteration and phase number, if applicable, are shown in the table heading.
Boundary points have to meet the linearity criteria, else the conditions for proper application of the soil support stiffness matrix at that points are violated.
H500522, last changed: 11/4/2020