VM-NR1677-01-3

VM-NR1677-01-3
NUREG/CR-1677: Volume 1, Benchmark Problem No. 3

Overview

Reference:P.Bezler, M. Hartzman & M. Reich, Dynamic Analysis of Uniform Support Motion Response Spectrum Method, (NUREG/CR-1677), Brookhaven National Laboratory, August 1980, Problem 3, Pages 81-121.
Analysis Type(s):
Modal analysis (ANTYPE = 2)
Spectral analysis (ANTYPE = 8)
Element Type(s):
3D 3-Node pipe (PIPE289)
3D 3-Node elbow (ELBOW290)
Spring-Damper Element (COMBIN14)
Mass element (MASS21)
Input Listing:

Test Case

For test case description, problem sketch, material properties, geometry properties and loadings refer to

VM-NR1677-01-3-a

Results Comparison

Table 101: Frequencies Obtained from Modal Solution

ModeFrequency
18.26797
210.275
318.567
420.380
522.808
627.092
733.031
838.275
944.508
1052.015

Table 102: Maximum Displacements and Rotations Obtained from Spectrum Solve

Result_NodeValue
UX at node960.302
UY at node980.309
UZ at node400.340
ROTX at node84 4.079e-03
ROTY at node76 5.866e-03
ROTZ at node104.249e-03

Table 103: Element Forces and Moments obtained from Spectrum Solve

ResultMAPDL
Element 28
PX(I)280.23
VY(I)281.60
VZ(I)420.65
TX(I)4672.7
MY(I)7469.5
MZ(I)9523.2
 
PX(J) 280.25
VY(J) 283.90
VZ(J) 422.04
TX(J) 4673.3
MY(J) 14867.
MZ(J)14934.
Element 50
PX(I) 456.94
VY(I) 129.01
VZ(I) 171.80
TX(I) 7337.8
MY(I) 3432.5
MZ(I) 11935.0
 
PX(J) 473.97
VY(J) 96.759
VZ(J) 208.29
TX(J) 6566.6
MY(J) 2729.1
MZ(J)12364.0

Note:  PX (I) and PX (J) = Section axial force at node I and J

VY (I) and VY (J) = Section shear forces along Y direction at node I and J

VZ (I) and VZ (J) = Section shear forces along Z direction at node I and J

TX (I) and TX (J) = Section torsional moment at node I and J

MY (I) and MY (J) = Section bending moments along Y direction at node I and J

MZ (I) and MZ (J) = Section bending moments along Z direction at node I and J