- Order of stiffness matrix corresponds to total dofs
- Singular stiffness matrix means structure is unconstrained and rigid body motion
- Each column of stiffness matrix is an equilibrium set of nodal force required to produce unit respective dof
- Symmetric stiffness matrix shows force is directly proportional to displacement
- Diagonal terms of the matrix are always positive i.e. force directed in say left direction cannot produce a displacement in right direction.
- Diagonal terms will be zero or negative only if the structure is unstable.
Wednesday, 11 April 2012
Properties of stiffness matrix
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Can you please elaborate on the fourth bullet?
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ReplyDeletecan u tell me WHAT ARE THE PROPERTIES OF FLEXIBILITY MATRIX??
ReplyDeleteThis method version of CDM method..
DeleteIs it truth that the determinate of stiffness matrix equals zero? Thank you
ReplyDeleteThe only case where the determinate of the stiffness matrix is nil is when the structure is unconstrained
DeleteIs any difference between. element stiffness matrix or stiffness matrix
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ReplyDeletewhat is dof..?
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DeleteDegree of freedom
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