01 Introduction to Virtual work principle | Potential Energy Principles
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Introduction to Virtual work principleThe
Introduction to Virtual work principle
The principle of virtual work is introduced first for static equilibrium and then, together with the D’Alembert principle, it is extended to the analysis of dynamical systems. While we are on the subject of equilibrium, an alternative method known as the principle of potential energy, is also introduced. These principles are helpful in understanding the variational principles in mechanics.
. The term virtual work, therefore, implies the hypothetical work which would have been done to result in a virtual displacement under the application of the given system of forces and couple-moments.
The principle of virtual work which we set out to enunciate is valid for a body in equilibrium. It states that the virtual work should be zero for a body to be in equilibrium
The principle of virtual work applies to a system of connected particles or of rigid bodies as good as to a single rigid body or to a single particle. Only the forces external to the system of connected bodies need be considered for virtual work; the internal forces cannot contribute to the virtual work. Care must be taken to select the virtual displacements in a manner which do not violate the constraints.
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The principle of virtual work is introduced first for static equilibrium and then, together with the D’Alembert principle, it is extended to the analysis of dynamical systems. While we are on the subject of equilibrium, an alternative method known as the principle of potential energy, is also introduced. These principles are helpful in understanding the variational principles in mechanics.
. The term virtual work, therefore, implies the hypothetical work which would have been done to result in a virtual displacement under the application of the given system of forces and couple-moments.
The principle of virtual work which we set out to enunciate is valid for a body in equilibrium. It states that the virtual work should be zero for a body to be in equilibrium
The principle of virtual work applies to a system of connected particles or of rigid bodies as good as to a single rigid body or to a single particle. Only the forces external to the system of connected bodies need be considered for virtual work; the internal forces cannot contribute to the virtual work. Care must be taken to select the virtual displacements in a manner which do not violate the constraints.
If like this video please donate PAYTM 9422112581 UPI "9422112581@UPI"
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