1402054378

# 141 150 2001 sellem et al 1999 sellem e de hillerina

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ition with body component thanks to two pairs: L1 and L2 for component 1 and L3 and L4 for component 2. Figure 5: Example Force exerted by this spring on point Pt1 depends on it stiffness noted S but also on actual distance l(1) between point Pt1 and point Pt2. A geometrical pair variation of position introduces a variation of distance between these points, hence a variation of force exerted by the spring, as shown figure 6. Figure 6: Rigid body movement influence We are able to find equation linking parameters of the geometrical pairs’ position and components’ point position: equation 5. Fx(1) = S.(Lini – l(1)) (5) Lini corresponds to the spring length when it is free of forces, and l(1) is actual distance between the two points. 306 G. Cid et al. l(1) = l nom (1) + d1 d2 d3 d4 .v M (1) + .v M (2) .v M (3) − .v M (4) d1 + d 2 d1 + d 2 d3 + d4 d3 + d4 In our example, v M ( 2) = 0 , v M (3) = 0 , v M ( 4) = 0 and l nom (1) has a numerical determined value. So we are able to write boundary conditions associated to this point: S .d 1 ⎧ ⎪ Fx(1) = (S.l ini -...
View Full Document

Ask a homework question - tutors are online