rigid body

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Rigid body

An idealized extended solid whose size and shape are definitely fixed and remain unaltered when forces are applied. Treatment of the motion of a rigid body in terms of Newton's laws of motion leads to an understanding of certain important aspects of the translational and rotational motion of real bodies without the necessity of considering the complications involved when changes in size and shape occur. Many of the principles used to treat the motion of rigid bodies apply in good approximation to the motion of real elastic solids. See Rigid-body dynamics

McGraw-Hill Concise Encyclopedia of Physics. © 2002 by The McGraw-Hill Companies, Inc.

rigid body

[′rij·id ′bäd·ē]
(mechanics)
An idealized extended solid whose size and shape are definitely fixed and remain unaltered when forces are applied.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The inertia characteristics of flexible body rigid motion are loaded onto the flexible body itself in the form of inertial forces.
The rigid body motion describes the motion of one end of a beam element, and the elastic motion is measured relative to the rigid motion. The beam elements are represented by 6 degrees of freedom (DOF) for the rigid motion and 9 DOF for the elastic motion (3 axial, 2 flap, 2 lag, and 2 torsion) that results in a 15 DOF for each beam finite element.
Ranola; 'Rigid Motion: A Story About Ninette De Las Penas,' illustrations by Mike Aldaba; 'The Stuff of Life: A Story about Giselle Concepcion,' illustrations by Ma.
In this paper, the rigid motion of the missile is obtained by the technique of automatic determination of the vibration characteristics.
Bulk movement was simulated as rigid motion with six degrees of freedom, comprising three rotation angles and a 3D translation vector.
It is assumed that the pedestal does rigid motion in XY plane.
Quandles and their kin--kei racks, biquandles, and biracks--are algebraic structures whose axioms encode the movement of knots in space, say Elhamdadi and Nelson, in the same way that groups encode symmetry and orthogonal transformations encode rigid motion. They introduce quandle theory to readers who are comfortable with linear algebra and basic set theory but may have no previous exposure to abstract algebra, knot theory, or topology.
Thus the resulting tiling is also monocoronal with mirror-symmetric corona, hence it is a monocoronal tiling up to rigid motion. We can force this tiling to be non-periodic by taking some non-periodic sequence of rotations of L' for odd layers.
From the obtained results, the six initial mode shapes are zero that could be result of rigid motion and rotation around the three coordinate axes.
It is proposed a dynamical analysis of a mobile mechanic system by the overlap of the solid rigid motion with the one of solid deformable.
A rigid motion in a metric manifold is a motion that leaves the metric [dl'.sup.2] unchanged.