Open Access

Appendix B

All phases degrees of freedom

Phase 1
Phase 2
Phase 3

δis a random value of small displacement.

hc is the height distance between points A and B before any loads are applied.

uc is the necessary deflection of point A for point B to touch the floor.

It is calculated by solving phase 1.

hs is the height distance between points A and C before any loads are applied.

e is the difference between the free length and the solid length of the spring.

– means the displacement is unknown and the corresponding load is null.

0 means the displacement is blocked (see Fig. 9).

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