# 2dom .docx - 2 A torsional system with discs of moment of...

• No School
• AA 1
• 25

This preview shows page 1 - 4 out of 25 pages.

2. A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear drivensuch that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent 14. The equation of motion for a vibrating system with viscous damping is(d²x/dt²) + (c/m).(dx/dt) + (s/m).x = 0, if the roots of the equation are __________ then the system willbe under damped. When a body is subjected to transverse vibrations, the stress induced in a body will be The critical speed of a shaft with a disc supported in between is equal to the natural frequency of thesystem in In steady state forced vibrations, the amplitude of vibrations at resonance is __________ dampingcoefficient. Equal to Directly proportional to Inversely proportional to Independent of When there is a reduction in amplitude over every cycle of vibration, then the body is said to have Free vibration Forced vibration Damped vibration Under damped vibration The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke) m.ω².r cosθ c.m.ω².r sinθ (1 - c).m.ω².r (cosθ - sinθ) m.ω².r (cosθ - sinθ)  • • • 