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Theory

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Simulation

Posttest

References

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Motor on a Foundation as a 2DOF system - Forced Vibration with rotating unbalance

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Intermediate

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How many modes does a 2DOF system have:

a: One normal mode Explanation

Explanation

b: Two normal modes Explanation

Explanation

c: Multiple normal modes Explanation

Explanation

d: No normal modes Explanation

Explanation

A system is vibrating at one of its natural frequency, it's configuration is called:

a: Natural mode Explanation

Explanation

b: Natural Frequency Explanation

Explanation

c: Solution Explanation

Explanation

d: All the above Explanation

Explanation

For a 2DOF system, the equation of motions are in the form of:

a: coupled algebraic equations Explanation

Explanation

b: coupled differential equations Explanation

Explanation

c: uncoupled equations Explanation

Explanation

d: None of the above Explanation

Explanation

At node and antinode, the amplitude is:

a: zero, zero Explanation

Explanation

b: zero, maximum Explanation

Explanation

c: maximum, zero Explanation

Explanation

d: maximum,maximum Explanation

Explanation

Which of the following statements is true?

a: The system will always exhibit resonance at the natural frequency of the first mode. Explanation

Explanation

b: The second mode shape of the system will have a higher natural frequency than the first mode. Explanation

Explanation

c: The damping ratio affects the amplitude of vibrations in both modes. Explanation

Explanation

d: The stiffness matrix for this system will be diagonal. Explanation

Explanation

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