Question 1 Figure 1(a) shows an overhead travelling crane, consisting of a girder which is simply supported at its ends, a trolley, and a wire rope. The girder is made of steel, having a span of 40 m, an area moment of inertia (I) of 0.03 m*, and a modulus of elasticity (E) of 210 GPa. The trolley has a mass (mı) of 1200 kg, and the load being lifted has a mass (m2) of 5200 kg and the wire rope has a stiffness (k) of 360 kPa. The system can be modelled as a two-degree-of-freedom as shown in Figure 1(b). (a) Find the natural frequencies of the system. (b) Find and also sketch the mode shapes of the system. Girder; Trolley kg. E, I Wire rope Load lifted (a) (b) Figure 1

Elements Of Electromagnetics
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Question 1
Figure 1(a) shows an overhead travelling crane, consisting of a girder which is simply supported at its
ends, a trolley, and a wire rope.
The girder is made of steel, having a span of 40 m, an area moment of inertia (I) of 0.03 m², and a
modulus of elasticity (E) of 210 GPa. The trolley has a mass (m1) of 1200 kg, and the load being lifted
has a mass (m2) of 5200 kg and the wire rope has a stiffness (k) of 360 kPa. The system can be modelled
as a two-degree-of-freedom as shown in Figure 1(b).
(a) Find the natural frequencies of the system.
(b) Find and also sketch the mode shapes of the system.
Girder;
Trolley
kg E, I
Wire
горе
Load
lifted
(a)
(b)
Figure 1
E h00000
Transcribed Image Text:Question 1 Figure 1(a) shows an overhead travelling crane, consisting of a girder which is simply supported at its ends, a trolley, and a wire rope. The girder is made of steel, having a span of 40 m, an area moment of inertia (I) of 0.03 m², and a modulus of elasticity (E) of 210 GPa. The trolley has a mass (m1) of 1200 kg, and the load being lifted has a mass (m2) of 5200 kg and the wire rope has a stiffness (k) of 360 kPa. The system can be modelled as a two-degree-of-freedom as shown in Figure 1(b). (a) Find the natural frequencies of the system. (b) Find and also sketch the mode shapes of the system. Girder; Trolley kg E, I Wire горе Load lifted (a) (b) Figure 1 E h00000
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