The Spring Loaded Accumulator component consists of a preloaded spring, a piston, and a hydraulic chamber connected to a hydraulic port. When the fluid pressure at the port exceeds the preloaded spring pressure, fluid flows into the chamber, moving the piston and compressing the spring. The amount of fluid stored in the accumulator depends on the size and spring load. The stroke of the piston is restricted by end cushion parameters used to set the boundary of the component respectively.

$a_{\mathrm{rel}}\=\frac{\mathrm{d}{v}_{\mathrm{rel}}}{\mathrm{d}t}{v}_{\mathrm{rel}}\=\frac{\mathrm{d}{s}_{\mathrm{rel}}}{\mathrm{d}t}$

$f_{\mathrm{spring}}\=-A{p}_{\mathrm{preload}}-c{s}_{\mathrm{rel}}-d\cdot v_{\mathrm{rel}}$

$f_{c_1}\&equals;\{\begin{array}{cc}0& s_{\mathrm{rel}}<L_{\max }\\ c_{\mathrm{ES}}\left(s_{\mathrm{rel}}-L_{\max }\right)& \mathrm{otherwise}\end{array}{f}_{c_2}\&equals;\{\begin{array}{cc}0& 0\le s_{\mathrm{rel}}\\ c_{\mathrm{ES}}{s}_{\mathrm{rel}}& \mathrm{otherwise}\end{array}$

$f_{d_1}\&equals;\{\begin{array}{cc}0& s_{\mathrm{rel}}<L_{\max }\\ d_{\mathrm{ES}}\frac{\mathrm{d}{s}_{\mathrm{rel}}}{\mathrm{d}t}& \mathrm{otherwise}\end{array}{f}_{d_2}\&equals;\{\begin{array}{cc}0& 0\le s_{\mathrm{rel}}\\ d_{\mathrm{ES}}\frac{\mathrm{d}{s}_{\mathrm{rel}}}{\mathrm{d}t}& \mathrm{otherwise}\end{array}$

$f_{e_1}\&equals;\{\begin{array}{cc}0& f_{c_1}\&plus;f_{d_1}\le 0\\ f_{c_1}\&plus;\min \left(f_{c_1}\&comma;f_{d_1}\right)& \mathrm{otherwise}\end{array}{f}_{e_2}\&equals;\{\begin{array}{cc}0& 0\le f_{c_2}\&plus;f_{d_2}\\ f_{c_2}\&plus;\max \left(f_{c_2}\&comma;f_{d_2}\right)& \mathrm{otherwise}\end{array}$

$p\&equals;p_A$

$q\&equals;q_A\&equals;A{v}_{\mathrm{rel}}$

$v_{\mathrm{rel}}\&equals;\frac{\mathrm{d}{s}_{\mathrm{rel}}}{\mathrm{d}t}$

$f_{\mathrm{chamber}}\&equals;pA$

$m{a}_{\mathrm{rel}}\&equals;f_{\mathrm{chamber}}\&plus;f_{\mathrm{spring}}-f_{e_1}-f_{e_2}$