VM-NR1677-01-2

VM-NR1677-01-2
NUREG/CR-1677: Volume 1, Benchmark Problem No. 2

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 2, Pages 48-80.
Analysis Type(s):
Modal analysis (ANTYPE = 2)
Spectral analysis (ANTYPE = 8)
Element Type(s):
Structural Mass element (MASS21)
3D 2-Node pipe (PIPE288)
Input Listing:

Test Case

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

VM-NR1677-01-2-a

Results Comparison

Table 98: Frequencies Obtained from Modal Solution

ModeFrequency
18.711
28.806
317.508
440.367
541.627

Table 99: Maximum Displacements and Rotations Obtained from Spectrum Solve

Result_NodeValue
UX at node60.461
UY at node8 2.368E-03
UZ at node8 0.450
ROTX at node1 6.597E-03
ROTY at node9 1.289E-05
ROTZ at node16.722E-03

Table 100: Element Forces and Moments obtained from Spectrum Solve

ResultMAPDL
Element 1
PX(I)558.93
VY(I)109.28
VZ(I)109.22
TX(I)1.622
MY(I)5181.6
MZ(I)5228.600
 
PX(J) 558.93
VY(J) 109.28
VZ(J) 109.22
TX(J) 1.622
MY(J) 279.490
MZ(J)235.190
Element 18
PX(I) 14.031
VY(I) 297.170
VZ(I) 12.389
TX(I) 0.140E-01
MY(I) 48.124
MZ(I) 1486.100
 
PX(J) 14.031
VY(J) 297.170
VZ(J) 12.389
TX(J) 0.140E-01
MY(J) 60.936
MZ(J)4049.1

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