subject
Engineering, 06.07.2019 03:10 cchotshot

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg. a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg. m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?

ansver
Answers: 1

Other questions on the subject: Engineering

image
Engineering, 03.07.2019 14:10, makaylashrout77
Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.
Answers: 2
image
Engineering, 03.07.2019 23:20, abbz13
Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct
Answers: 3
image
Engineering, 04.07.2019 18:10, selenamr
Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed. gi) ifn 1, what will happen to the material when transformed material when
Answers: 1
image
Engineering, 04.07.2019 18:10, oliviasoreo92
Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa
Answers: 1
You know the right answer?
Tom is having a problem with his washing machine. he notices that the machine vibrates violently at...

Questions in other subjects:

Konu
Mathematics, 15.09.2020 01:01
Konu
English, 15.09.2020 01:01
Konu
Mathematics, 15.09.2020 01:01
Konu
Social Studies, 15.09.2020 01:01
Konu
French, 15.09.2020 01:01
Konu
Social Studies, 15.09.2020 01:01
Konu
Mathematics, 15.09.2020 01:01
Konu
History, 15.09.2020 01:01
Konu
Social Studies, 15.09.2020 01:01
Konu
Mathematics, 15.09.2020 01:01