Page 312 - Finite Element Modeling and Simulations with ANSYS Workbench

Structural Vibration and Dynamics 297

All dimensions are in
Load
centimeters.
1.000

R1.000
1.000
3.000
8.000

8.8 The following two-bar assembly consists of four components made of struc-
tural steel with Young’s modulus E = 200 GPa, Poisson’s ratio ν = 0.3, and den-
3
sity ρ = 7850 kg/m . As shown in the figure below, the two bars are identical
in size. Each bar has a diameter of 2 cm and a length of 16 cm. The two identi-
cal end blocks each has a thickness of 2 cm and a fillet radius of 1 cm at the
round corners. The distance of the gap in between the two blocks is 8 cm.
Suppose that the two blocks are fixed on the bottom. The bars are applied a
2
harmonic pressure load of magnitude 100 N/cm as shown below. Using the
FEA, compute:
a. The first five natural frequencies and normal modes of the assembly
b. The frequency response of the x directional deformation (along the load
direction) of the cylindrical bar surface under the given harmonic load

All dimensions are in centimeters.
Use bonded contact for all contact regions.

2.000 5.000 Load

R1.000
Load

6.000
10.000

8.9 The following clevis assembly consists of a yoke, a pin, and a u-shape. The
assembly components are made of structural steel with Young’s modulus
E = 200 GPa, Poisson’s ratio ν = 0.3, and density ρ = 7850 kg/m . The profile
3
sketches of the yoke and the u-shape are shown below. Both components have
an extrusion depth of 5 cm. The pin has a diameter of 2 cm and a length of
16 cm, and is centered 2.5 cm away from both the front and the side faces of
the u-shape. Assume that the yoke is fixed on the left end, and the u-shape is