MT-1620 Fall 2002 Have considered the vibrational behavior of a discrete system How does one use this for a continuous structure? First need the concept of Influence Coefficients which tell how a force/displacement at a particular point " influences a displacement/force at another point useful in matrix methods finite element method lumped mass model (will use this in next unit consider an arbitrary elastic body and define Figure 21.1 Representation of general forces on an arbitrary elastic body 马 刁 Paul A Lagace @2001 Unit 21-2MIT - 16.20 Fall, 2002 Have considered the vibrational behavior of a discrete system. How does one use this for a continuous structure? First need the concept of….. Influence Coefficients which tell how a force/displacement at a particular point “influences” a displacement/force at another point --> useful in matrix methods… • finite element method • lumped mass model (will use this in next unit) --> consider an arbitrary elastic body and define: Figure 21.1 Representation of general forces on an arbitrary elastic body Paul A. Lagace © 2001 Unit 21 - 2