The logarithmic decrement is equal to 0.003. Calculate the number of complete oscillations it takes for vibration amplitude to decrease to 0.5 of its initial value.
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
3. The initial amplitude of the simple pendulum A = 0.2m. The amplitude after 10 oscillations is A = 0.1. Find the logarithmic decrement and damping coefficient if the period of oscillations is 1 = 5s. Write down the equation of oscillations.
A mass of 10 kg is suspended by a spring having a stiffness of 10000o N/m. The viscous damping causes the amplitude to decrease to one-tenth of the initial value in four complete oscillations. If a periodic force of 150 cos 50t is applied to the mass in vertical direction, (a) Find the amplitude of the forced vibration (b) What is its amplitude at resonance? (c) Comment on the results obtained in part (a) and (b) (15 markah/marks)
6. An underdamped shock absorber for a moon-buggy is to be designed. The system can be considered as simple SDOF system weighing 2500 N as shown in Figure 2 (a) and its damped free vibration response is shown in Figure 2 (b).lf the damped period of vibration is to be 0.8 sec and the amplitude x, is to be reduced to one-third in one half cycle. A/2 a. Draw the free-body and kinetic diagrams for the system. b. Determine the...
3. A particle makes 100 oscillations during 100 s. Amplitude is diminished by factor of 2.718 during this period of time. Find the damping coefficient and the logarithmic decrement.
note:Please write it with your hand font by A4
sheet
H Assignment submission -MCE 3 X Bb EMT 4923 Mechanical vibrations x X Cluil ()X nylearn.hct.ac.ae/bbcswebdav/pid-12428971-dt-content-rid-20811679 1/courses/201830 30831/LO2.pdf 6. An underdamped shock absorber for a moon-buggy is to be designed. The system can be considered as simple SDOF system weighing 2500 N as shown in Figure 2 (a) and its damped free vibration response is shown in Figure 2 (b).If the damped period of vibration is to be 0.8 sec...
I need complete and accurate solution.i am stuck here,I have to submit tommorow. Pr.86.7A platform of weight W 4000 lb is being supported by four equal columns which are clamped to the foundation as well as to the platform. Experimentally it has been determined that a static force of F= 1000 lb applied horizontally to the platform produces a displacement of A = 0.10 in. It is estimated that damping in the structures is of the order of 5% of...
Damped SHM motion A mass M is suspended from a spring and oscillates with a period of 0.840 s. Each complete oscillation results in an amplitude reduction of a factor of 0.965 due to a small velocity dependent frictional effect. Calculate the time it takes for the total energy of the oscillator to decrease to 69% of its initial value. The amplitude after N oscillations- (initial amplitude) x(damping factor)N Submit wIncorrect. Tries 2/6 Previous Tries 1998-2018 by Florida State University....
QUESTION 10 Q8 (a): shock absorber for a car is to be designed. The system can be considered as simple SDOP system with a mass of m kg as shown in figure (below) and its damped free vibration response is shown beside that. The damped period of vibration is to be Td sec. n u It is observed that the amplitude reduced to,% of initial value after 2 oscillations. x(o) 2 For the above question, determine the damped natural frequencies...
clear handwriting , no typing , show all
work please!
e.g.25 A mass of 5 kg is suspended on a spring and set oscillating. It is observed that the amplitude reduces to 5% of its initial value after 2 oscillations. It takes 0.5 seconds to do them. Calculate the following: i. The damping ratio. ii. The natural frequency. iii. The actual frequency. iv. The spring stiffness. v. The critical damping coefficient. vi. The actual damping coefficient.
uestion 2 (25% total a) For a lightly-damped SDOF system, let x, and 1,- be the free vibration displacement amplitudes at the initial (reference) moment and m cycles later, respectively. (15%) In the class we concluded that the damping ratio can be estimated using logarithmic decrement as (LI) 27m Does this method still work if instead of displacement amplitudes, we use velocity amplitudes? That is, can be estimated based on 1+m where v, and Vi+ are the free vibration velocity...