The Translational Elasto Gap (or Elasto Gap) component models a Spring Damper that can lift-off.

When the distance between the flanges is greater than the relaxed spring length, no force is exerted. Outside of this region, contact is present and the contact force is basically computed with a linear spring/damper characteristic. The parameter $n$ can be used to model a nonlinear spring force.

$\mathrm{contact}\&equals;\left(s_{\mathrm{rel}}<s_{\mathrm{rel0}}\right)$

$s_{\mathrm{rel}}\&equals;s_b-s_a$

$v_{\mathrm{rel}}\&equals;{\stackrel{\&period;}{s}}_{\mathrm{rel}}$

$f\&equals;f_c\&plus;f_d\&equals;-f_a\&equals;f_b$

$f_c\&equals;\{\begin{array}{cc}-c{\left|s_{\mathrm{rel}}-s_{\mathrm{rel0}}\right|}^n& \mathrm{contact}\\ 0& \mathrm{otherwise}\end{array}$

$f_d\&equals;\{\begin{array}{cc}0& \neg \mathrm{contact}\\ f_c& f_{\mathrm{d2}}<f_c\\ -f_c& -f_c<f_{\mathrm{d2}}\\ f_{\mathrm{d2}}& \mathrm{otherwise}\end{array}$

$f_{\mathrm{d2}}\&equals;\{\begin{array}{cc}d{v}_{\mathrm{rel}}& \mathrm{contact}\\ 0& \mathrm{otherwise}\end{array}$

$\mathrm{lossPower}\&equals;f_d{v}_{\mathrm{rel}}$

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.