ABSTRACT
We now consider the dynamics of a continuum, using the method of finite elements. † We start by going back to Eq. (7.1), which is a statement of the principle of virtual work that incorporates D’Alembert’s principle, with inertia included as a body force distribution. The vector u i (or u) in Eq. (7.1) has three components u, v, w, so that in matrix notation we can say () { u } = { u v w } https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203757574/4235af40-2611-459d-bfa5-b07bb5469fec/content/eq3032.tif"/>
