C=15米的竹竿做成L=10米的跨度拱形能有多高H?
弧半径为R,弧所对的圆心角为A.
Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*Rn
R0=5
R1=5.014
R2=5.014
R=5.014米
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((10/2)/5.014)
=171.34度
H=R-R*COS(A/2)
=5.014-5.014*COS(171.34/2)
=4.64米
C=15米的竹竿做成L=10米的跨度拱形能有多高H?
弧半径为R,弧所对的圆心角为A.
Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*Rn
R0=5
R1=5.014
R2=5.014
R=5.014米
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((10/2)/5.014)
=171.34度
H=R-R*COS(A/2)
=5.014-5.014*COS(171.34/2)
=4.64米