Principles of Engineering Mechanics (2nd Edition) Episode 12 pps

... above equations gives so substituting 12. 11 into 12. 9 and using 12. 10 we (12. 7) finally obtain FL a= AE a2u a2u ax2 at2 E- = p- (12. 12) A state of tension resulting in an extension ... or h= (12. 51) and from 12. 48 ETAT+ERAR 6R = %-e (12. 52) From equations 12. 49 and 12. 50 the forces in each component can be found and hence the stresses. 12. 28...

Ngày tải lên: 12/08/2014, 16:21

... product of co- 7 Hz sinusoidal force of amplitude equal to 1% of the ordinates.) weight of machine A is applied to the machine at A what is the amplitude of motion of the structure ... a function of time for a given function 01. Note that a purely mechanical analogue of this system could consist of a flywheel of moment of inertia I connected to a sh...

Ngày tải lên: 12/08/2014, 16:21

... (a < b) U 12. 10 5.39 kNrn 12. 11 w'= w/4 12. 12 2.49 x lo6 mm4 12. 13 5.61 kN 12. 14 10.086 kN/m 12. 15 75 kN/m 12. 16 e = WL~/(~EI), 6 = WL3/(8EI) 12. 17 P = W(3L/a ... = W(3L/a - 1)/2, d3 12. 19 6 = -7WL3/(6ZcD) 12. 20 Ratio = 1.7 12. 21 5.1 mm 12. 22 50.5 mm, 142 kW 12. 23 4.3 kN, 127 .6 mm 12. 24 352 N, 148 N 12. 25 E,...

Ngày tải lên: 12/08/2014, 16:21

... moment of external forces = C moment of (mass x acceleration) = moment of the rate of change of = rate of change of the moment of or momentum momentum We may n~~ke use of ... equal to the product of the total mass and the acceleration of the centre of mass. We must now consider the effect of the positions of the lines of action of t...

Ngày tải lên: 12/08/2014, 16:21

... side of a hill which slopes at 30" away from the centre of curvature of the path as shown. The radius of curvature to the centre of mass can be taken as 30m. The coefficient of ... Moment of inertia of a right circular uniform i) Moment of inertia about the axis of the cylinder. In Fig. 6.8, the mass of an elemental rod is pLdr(rdO), where p is the...

Ngày tải lên: 12/08/2014, 16:21

... and that of the spider is 0.09 kg m2. Each planet has a mass of 2.0 kg and an axial moment of inertia of 0.0025 kg m2. The centres of the Planet wheels are at a radius of 120 mm from ... A and D. The moment of inertia of AB about A is 0.45 kg m2, that of BC about its mass centre G is 0.5 kg m2 and that of CD about D is 0 .12 kg m2. The mass of...

Ngày tải lên: 12/08/2014, 16:21

... consider a general case (Fig. 8 .12) just after the front of the box has made Shaft BC: [MG = IGh] d%C + Qo = 12- dt 1; Qodt = 1 Wc 12 d%c = 12 (wc - Y) Adding equations ... (ii) Y (~1 +12) ~c-(~1w1 +124 = 0 and we note that, for this case, there is no change in moment of momentum. The final angular negligible. velocity is wc = (11w, +12@ 2)/(11 +1...

Ngày tải lên: 12/08/2014, 16:21

... the total mass times the acceleration of the centre of mass, and is independent of any rotation. Moment of momentum The moment of momentum of a particle about a point 0 is defined ... a flywheel of moment of inertia I, and the damping torque at the load is equal to C times the angular velocity of the load. The moment of inertia of the rotor of t...

Ngày tải lên: 12/08/2014, 16:21

... study of the motion of material bodies and of the associated forces. The study of motion is called kinematics and involves the use of geometry and the concept of time, whereas the study of the ... vector sum of the external forces acting on a particular set of particles equals the total mass times the acceleration of the centre of mass, irrespective of the indi...

Ngày tải lên: 27/06/2014, 05:20

... Part 3 Engineering Mechanics syllabuses of degree courses in engineering. The emphasis of the book is on the principles of mechanics and examples are drawn from a wide range of engineering ... vector sum of the external forces acting on a particular set of particles equals the total mass times the acceleration of the centre of mass, irrespective of the indi...

Ngày tải lên: 27/06/2014, 18:20