DYNAMICS OF PACKAGE CUSHIONING 



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Fig. 1.7.2 — A tension spring package. 



The load-displacement characteristics of the spring system may be found 

 by statical considerations. We shall examine, first, the displacement in the 

 vertical direction in Fig. 1.7.1, using the following notations: 

 P = force applied to the suspended object, 

 .V2 = displacement of suspended object, 



.To = perpendicular distance (IR, Fig. 1.7.1) from inner spring support 

 point (/, Fig. 1.7.1) to nearest plane, perpendicular to displacement 

 direction and containing four outer spring support points (A , B, C, 

 A Fig. 1.7.1); 



