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Answer the following problems in detail.

problem 1) Describe the functions of vibration absorber.

problem 2) Front axle of a car has pivot centres 1.1 m apart. Length of each steering arm is 150 mm while the track rod is of 1.0 m length. Compute the wheelbase for perfect rolling of the car wheels when inner wheel stub axle is at 55° to the rear centre line.

problem 3) Holzer’s method is the trial and error method used to determine the natural frequency and mode shapes of multimass lumped parameter system for free and forced vibration? Describe in detail.

problem 4) Describe the effect of camber and camber angle in a car.

problem 5) Springs of the automobile trailer are compressed 0.1 m under its own weight. Determine the critical speed when the trailer is passing over a road with a profile of sine wave whose amplitude is 80 mm and the wave length is 14 m. Determine amplitude of vibration at a speed of 60 km/hr.

problem 6) Car whose wheel base is equal to five times the height of its centre of gravity above the ground, is moving on a horizontal road when brakes are applied. If a coefficient of limiting friction between car tyres and rod is 0.5, find out the percentage of weight transferred from the rear to the front axle, on braking.

problem 7) prepare a detailed note on Dunkerby’s lower bound method for finding fundamental frequency.

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M99133

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