VM-NR1677-01-1

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

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 1, Pages 24-47.
Analysis Type(s):
Modal analysis (ANTYPE = 2)
Spectral analysis (ANTYPE = 8)
Element Type(s):
Structural Mass Element (MASS21)
3D 3-Node Pipe (PIPE289)
3D 3-Node Elbow (ELBOW290)
Input Listing:

Test Case

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

VM-NR1677-01-1-a

Results Comparison

Table 95: Frequencies Obtained from Modal Solution

ModeFrequency
128.515
256.441
382.947
4144.140
5166.260

Table 96: Maximum Displacements and Rotations Obtained from Spectrum Solve

Result_NodeValue
UX at node10 7.830E-03
UY at node36 2.648E-03
UZ at node28 1.748E-02
ROTX at node 9 1.867E-04
ROTY at node18 2.123E-04
ROTZ at node97.217E-05

Table 97: Element Forces and Moments Obtained from Spectrum Solve

ResultMAPDL
Element 12
PX(I)24.019
VY(I)7.514
VZ(I)34.728
TX(I)123.39
MY(I)2131.700
MZ(I)722.790
  
PX(J) 24.018
VY(J) 7.514
VZ(J) 34.728
TX(J) 123.390
MY(J) 2442.700
MZ(J)786.730
Element 14
PX(I) 5.1505
VY(I) 7.2987
VZ(I) 7.9178
TX(I) 450.42
MY(I) 675.58
MZ(I) 314.97
  
PX(J) 6.0056
VY(J) 6.6138
VZ(J) 7.9146
TX(J) 157.85
MY(J) 858.09
MZ(J)302.94

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