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Dynamic Shock Response Analysis Problem
This chapter contains a dynamic shock response analysis problem and Creo Simulate's results. In a dynamic shock response analysis, Structure calculates maximum values of displacements and stresses on your model in response to a base excitation with a specified response spectrum. Structure also automatically calculates all predefined measures. This list of measures differs based on the analysis type.
mvsk001: Seismic Response of a Beam Structure
Analysis Type:
Dynamic Shock
Model Type:
3D
Comparison:
ANSYS No. 70
Reference:
Biggs, J. M. Introduction to Structural Dynamics. McGraw-Hill Book Co., New York, 1964.
Description:
A simply supported beam is subjected to a vertical motion of both supports. The motion is defined in terms of a seismic displacement response spectrum. Determine the maximum displacement and the corresponding maximum bending stress.
Specifications
Element Type:
beam (2)
Units:
IPS
Dimensions:
length: 240
height: 14
Beam Properties:
Area: 273.9726
IYY: 333.333
Shear FY: 0.83333
CY: 7
J: N/A
IZZ: 333.333
Shear FZ: 0.83333
CZ: 7
Material Properties:
Mass Density: 0.00073
Cost Per Unit Mass: 0
Young's Modulus: 3e7
Poisson's Ratio: 0.3
Thermal Expansion: 0
Conductivity: 0
Constraints:
Location:
Degrees of Freedom:
constraint1
placed on point A
fixed in TransY and TransZ
placed on point B
fixed in TransX, TransY, TransZ
placed on point C
fixed in TransZ, RotX, RotY
Response Spectrum:
Frequency:
Displacement:
resp_spectrum1
0
10
0.44
0.44
Comparison of Results Data
Theory
ANSYS
Structure
% Difference
Frequency
6.0979
6.0974
6.0953
0.04%
Max. Displacement
(m=disp_max)
0.560
0.553
0.560
0%
Max. Bending Stress
20158
20156
20138
0.1%
Convergence %: 0.0% on Frequency
Max P: 6
No. Equations: 70