2021 Mechanics of Vibration(东南大学)1465273443 最新满分章节测试答案

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本课程起止时间为:2021-08-05到2021-10-31

Chapter 2： Free Vibration of Single-Degree-of-Freedom Systems Quiz one

1、 问题:Stiffness increases when the natural frequency (); The mass increases when the natural frequency (). 
选项：
A:increase  increase
B:decrease  increase
C:increase  decrease
D:decrease  decrease
答案: 【decrease  increase】

2、 问题:The theoretical basis of using energy method to find the natural frequency of the system is ().
选项：
A:Theorem of moment of momentum
B:The kinetic energy theorem
C:Law of conservation of  mechanical energy
D:The momentum theorem
答案: 【Law of conservation of  mechanical energy】

3、 问题:For the following free vibration system, which one decays the fastest ().
选项：
A:Undamped system
B:Underdamped system
C:Critical damping system
D:Overdamped system
答案: 【Critical damping system】

4、 问题:The amplitude of an undamped system varies with time. ()
选项：
A:正确
B:错误
答案: 【正确】

5、 问题:The maximum acceleration of the simplified harmonic vibration of a spring mass system is a, and the natural frequency of the system is ω. What is the maximum velocity of the system ? ()
答案: 【a/ω】

Chapter 3： Harmonically Excited Vibration of SDOF systems Quiz two

1、 问题:The response of an undamped system under resonance will be () ?
选项：
A:very large
B:infinity
C:zero
D:very small
答案: 【infinity】

2、 问题:The frequency of beating is () ? 
选项：
A:ωn-ω
B:ωn
C:ω
D:2ωn
答案: 【ωn-ω】

3、 问题:The complex frequency response, H(iω), is defined by () ?
选项：
A:X/F0
B:kX/F0
C:XF0
D:F0/kX
答案: 【kX/F0】

4、 问题:The magnification factor is also known as _____ factor.
答案: 【amplification】

5、 问题:The phenomenon of _____ can occur when the forcing frequency is close to the natural frequency of the system.
答案: 【resonance】

Chapter 4： Vibration Under General Forcing Condition Quiz three

1、 问题:If a system is subjected to a suddenly applied nonperiodic force, the response will be_?
选项：
A:periodic
B:transient
C:steady
D:zero
答案: 【transient】

2、 问题:The equation of motion of a system subjected to base excitation, y(t), is given by
选项：
A:
B: