Dear SACS experts,
Need your help again.
I have some doubts , when we're perform eigen value analysis (dynamic) for fatigue spectral analysis.
If there is command KEEP and DELETE for appurtenances such as boatlanding,
Is it really required to deactivate or turn off KEEP and DELETE command to run dynamic analysis so all appurtenances converted to structural and the weight included in member elements?
If I'm still keeping the KEEP and DELETE command , the result will show such as below;
What is the definition of weight factors highlighted below, because in dyninp , the weight contingency factor is = 1.05
************ NON-STRUCTURAL WEIGHT DATA ************ FLUID **** COORDINATES **** FACTORED WIGHT ADDED ITEM GROUP WEIGHT WEIGHT X Y Z W EIGHT FACTORS X Y Z DENSITY VOLUME WEIGHT NO. ID KN ID M M M X Y Z KN KN KN MT/M**3 M **3 KN
1 DUM1 714.0 BL-NORTH 0.6 10.1 0.7 1.32 1.33 1.19 942.4 949.6 949.6 0.000 0.0 0.0
*** TOTAL *** 942.4 949.6 849.6
SACS CONNECT Edition (v11.0) McDermott ID=dm11cHR6d3tumXZrpmqVmZ5jZWhufGhlbKtqlZlyZHk= QATAR GAS -WHP 1 FATIGUE ANALYSIS DATE 02-APR-2018 TIME 14:43:03 DYN PAGE 36
************* WEIGHT AND CENTER OF GRAVITY SUMMARY *************
************ ITEM DESCRIPTION ************ ************** WEIGHT ************** ******** CENTER OF GRAVITY ******** X Y Z X Y Z KN KN KN M M M
PLATE ELEMENTS 0.001 0.001 0.001 -1.670 0.000 -15.402
PLATE ELEMENT ADDED MASS 5.155 5.155 5.155 -1.648 0.000 -23.860
MEMBER ELEMENTS 16764.208 16764.208 16764.208 1.182 0.100 -20.909
MEMBER ELEMENT NORMAL ADDED MASS 9408.137 9408.228 3289.238 1.104 0.056 -37.313
FLOODED MEMBER ELEMENT ENTRAPPED FLUID 5476.904 5476.904 5476.904 0.626 0.008 -30.320
LOAD CASES CONVERTED TO WEIGHTS 18032.535 18032.535 18032.535 2.733 -0.609 11.599
NON-STRUCTURAL WEIGHTS 942.436 949.576 849.621 0.560 10.100 0.725
************ TOTAL ************ 50629.376 50636.608 44417.662 1.648 0.017 -9.673
Thank you for your help.
Cheers,
Lenny farida
If KEEP and DELETE card is existed in you input file. Added mass contribution from these appurtenances will be missed and hence not calculated in Eigen Value analysis.