|Series||VDI -- 2060|
Balance quality of rotating rigid bodies. Keep up to date with ISO. Sign up to our newsletter for the latest news, views and product informationCategory: w. Mechanical vibration -- Balance quality requirements for rotors in a constant (rigid) state -- Part 1: Specification and verification of balance tolerances. Rigid body o. F line of action of force axis point of application of force. Section Solid Mechanics Part I Kelly It should be emphasized that there is not actually a physical axis, such as a rod, at the point o of Fig. ; in this discussion, it is imagined that an axis is Size: KB. out of balance, the ride is quite unpleasant. In the case of a simple wheel, balancing simply involves moving the centre of gravity to the centre of rotation but as we shall see, for longer and more complex bodies, there is more to it. For a body to be completely balanced it must have two things. 1. Static Size: KB.
For workshop balancing machines, attach the flanges and keys to simulate actual rotation. Use balancing speed as close as possible to the operating speed if : Jaafar Alsalaet. attitude control problems of rigid space vehicles will be covered in Chapter 7. Angular Momentum of a Rigid Body Consider a rigid body that is in motion relative to a Newtonian inertial reference frame N, as shown in Fig. The rotational equation of motion of the rigid bodyFile Size: KB. Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state — Part 1: Specification and verification of balance tolerances 1 Scope This part of ISO gives specifications for rotors in a constant (rigid) state. It specifies a) balance tolerances, b) the necessary number of correction planes, and. 2. Balance the attached components separately to ISO grade G1 or better a. Balance should be accomplished normally using shop mandrels or other balance hardware. Mandrels should be precision balanced and have eccentricity.
A rigid rotor can be balanced at the two end planes and will stay in balance when in service. A flexible rotor will require multi-plane balancing. If a rotor is balanced on a low speed balancing machine assuming it is rigid and then in service becomes flexible, then unbalance, and thus high vibration, will be the Size: KB. An applied force on a rigid body can create a torque that causes an angular acceleration about some point. The torque depends on the size of the force, but what else? Consider: Pivot Point, P The forces have equal magnitudes, which force causes the most rotation? (LC) Pivot Point,P The forces have equal magnitudes. The Motion of Rigid Bodies Figure Wolfgang Pauli and Niels Bohr stare in wonder at a spinning top. Having now mastered the technique of Lagrangians, this section will be one big application of the methods. The systems we will consider are the spinning motions of rotation nˆ and the rate of rotation d/dt will change over Size: KB. Chapter Rotation of a Rigid Body. The rigid body model: Practitioners of other sciences often poke fun at physicists who stereotypically start off a class by asking you to “Consider a spherical cow ” In fact, this is the “particle model”, which has actually served us quite well until now.