弹簧隔振器的系数k0=4.5

hc=3.5



d=[3.15 3.23]

a1=tan(pi*(d)./(2*hc))

a2=cot(pi*(d)./(2*hc))

％ plot(d,a1)

y=(a1+a2)*2*k0*hc*1e-3./pi

y=y./9.8*8



％

var=1+(tan(pi*(d+0.25)./(2*hc))).^2

k=2*k0*hc/pi*( var*pi./(2*hc)+var*pi./(2*hc)./(var-1