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subject of mechanical vibrations
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subject of mechanical vibrations Q2) Mark a circle on the correct answer: 1) Lagrange equation can...
subject of mechanical vibrations
Q2) Mark a circle on the correct answer: 1) Lagrange equation can be applied: A-only for single degree of freedom system. C-only for multiple degree of freedom system. 2) coordinate couplings is considered as: A-single degree of freedom. C-third degree of freedom. B- only for two degree of freedom system. D- for any dynamical system. B-second degree of freedom. D-fourth degree of freedom. 3) Dynamic absorber for undamped system is composed of: A-spring only to be...
Single Degree of Freedom -Free Damped Vibration of Machines and Vibrations problem shows a lever ...
Single Degree of Freedom -Free Damped Vibration of Machines and Vibrations problem shows a lever with spring, mass and damper system. The lever has a moment p9 shows a lever with Agure so kgm2 pivoted at point O with a pulley of mass 4 kg with a radius r-0.5 m Vibration and and load mp4 kg. The load stioping between the puiley and cable supporting the load m. The stiffiess coefficient sippie spring isk=2x105 N/m. Calculate the following when the...
Question 3 (24 marks) A uniform bar of length L= 1.1m and mass m = 4.2kg...
Question 3 (24 marks) A uniform bar of length L= 1.1m and mass m = 4.2kg is connected with a spring with stiffness k = 2000N/m and a damper with damping ratio š = 0.3. The bar is rotating about a point that is 10cm from the left end. (1) Calculate the total kinetic energy and total potential energy. (2) Derive the equation of motion using energy based approach. (3) Determine the undamped natural frequency and damped natural frequency of...
note:Please write it with your hand font by A4 sheet H Assignment submission -MCE 3 X...
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...
Question 3. A vibrating machine is fitted with a damped vibration absorber of the spring-mass type....
Question 3. A vibrating machine is fitted with a damped vibration absorber of the spring-mass type. The absorber has a mass of 5 kg, a damping ration of 0.6, and a damped natural frequency of 25Hz. Find the maximum dynamic force applied to the machine by the absorber when the machine is vibrating sinusoidally at 20HZ and with an amplitude of 1.5mm. machine: a = asin(wt) k C m y Hintl: Start with o, o/ N(1-5°) Hint2: The answer is...
6. An underdamped shock absorber for a moon-buggy is to be designed. The system can be...
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...
A second order mechanical system of a mass connected to a spring and a damper is subjected to a s...
A second order mechanical system of a mass connected to a spring and a damper is subjected to a sinusoidal input force mi+ci +kx- Asin(ot) The mass is m-5 kg, the damping constant is c = 1 N-sec/m, the spring stiffness is 2 N/m, and the amplitude of the input force is A- 3 N. For this system give explicit numerical values for the damping factor un-damped natural frequency on a. and the
A second order mechanical system of a...
QUESTION 4 (140 marks) Determine the damped frequency of the spring-mass system schematically illustrated below if...
QUESTION 4 (140 marks) Determine the damped frequency of the spring-mass system schematically illustrated below if the spring stiffness is 3000 N/m and the damping coefficient c is set at 320 Ns/m. If a periodic 260 N force is applied to the mass at a frequency of 2 Hz, determine the amplitude of the forced vibration. Spring Viscous damper 35 kg Figure 4
3. In a vibrating system, Damping limits the amplitude of vibration at resonance to a finite...
3. In a vibrating system, Damping limits the amplitude of vibration at resonance to a finite value There is no vibration if the exciting force vibrates at very high frequencies comparedto the natural frequency The system vibrates together with the exciting force at very low frequencies compared to the natural frequency All of the above are true. a. b. c. d. 4· The cheapest of composite matenals used in small craft hull construction is: a. b. c. d. Carbon fiber-...
2 with spring stiffness k 1000 N/m, Consider a mass-spring-damper system shown in Figure mass m...
2 with spring stiffness k 1000 N/m, Consider a mass-spring-damper system shown in Figure mass m = 10 kg, and damping constant c-150 N-s/m. If the initial displacement is xo-o and the initial velocity is 10 m/s (1) Find the damping ratio. (2) Is the system underdamped or overdamped? Why? (3) Calculate the damped natural frequency (4) Determine the free vibration response of the system.
subject of mechanical vibrations
Q2) Mark a circle on the correct answer: 1) Lagrange equation can be applied: A-only for single degree of freedom system. C-only for multiple degree of freedom system. 2) coordinate couplings is considered as: A-single degree of freedom. C-third degree of freedom. B- only for two degree of freedom system. D- for any dynamical system. B-second degree of freedom. D-fourth degree of freedom. 3) Dynamic absorber for undamped system is composed of: A-spring only to be...
Single Degree of Freedom -Free Damped Vibration of Machines and Vibrations problem shows a lever with spring, mass and damper system. The lever has a moment p9 shows a lever with Agure so kgm2 pivoted at point O with a pulley of mass 4 kg with a radius r-0.5 m Vibration and and load mp4 kg. The load stioping between the puiley and cable supporting the load m. The stiffiess coefficient sippie spring isk=2x105 N/m. Calculate the following when the...
Question 3 (24 marks) A uniform bar of length L= 1.1m and mass m = 4.2kg is connected with a spring with stiffness k = 2000N/m and a damper with damping ratio š = 0.3. The bar is rotating about a point that is 10cm from the left end. (1) Calculate the total kinetic energy and total potential energy. (2) Derive the equation of motion using energy based approach. (3) Determine the undamped natural frequency and damped natural frequency of...
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...
Question 3. A vibrating machine is fitted with a damped vibration absorber of the spring-mass type. The absorber has a mass of 5 kg, a damping ration of 0.6, and a damped natural frequency of 25Hz. Find the maximum dynamic force applied to the machine by the absorber when the machine is vibrating sinusoidally at 20HZ and with an amplitude of 1.5mm. machine: a = asin(wt) k C m y Hintl: Start with o, o/ N(1-5°) Hint2: The answer is...
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...
A second order mechanical system of a mass connected to a spring and a damper is subjected to a sinusoidal input force mi+ci +kx- Asin(ot) The mass is m-5 kg, the damping constant is c = 1 N-sec/m, the spring stiffness is 2 N/m, and the amplitude of the input force is A- 3 N. For this system give explicit numerical values for the damping factor un-damped natural frequency on a. and the
A second order mechanical system of a...
QUESTION 4 (140 marks) Determine the damped frequency of the spring-mass system schematically illustrated below if the spring stiffness is 3000 N/m and the damping coefficient c is set at 320 Ns/m. If a periodic 260 N force is applied to the mass at a frequency of 2 Hz, determine the amplitude of the forced vibration. Spring Viscous damper 35 kg Figure 4
3. In a vibrating system, Damping limits the amplitude of vibration at resonance to a finite value There is no vibration if the exciting force vibrates at very high frequencies comparedto the natural frequency The system vibrates together with the exciting force at very low frequencies compared to the natural frequency All of the above are true. a. b. c. d. 4· The cheapest of composite matenals used in small craft hull construction is: a. b. c. d. Carbon fiber-...
2 with spring stiffness k 1000 N/m, Consider a mass-spring-damper system shown in Figure mass m = 10 kg, and damping constant c-150 N-s/m. If the initial displacement is xo-o and the initial velocity is 10 m/s (1) Find the damping ratio. (2) Is the system underdamped or overdamped? Why? (3) Calculate the damped natural frequency (4) Determine the free vibration response of the system.
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