Roof Design

Bow–Roof Prediction Formula:-

W = [1.73 x 10^(-3) x L] + [1.85 x 10^(-8) x (R^2)/t] + [ 1.10x10^(-3) x l] - 2.68

Judgment Condition

OK< 2.7

sr.no	BOW's	`	Ry	R	l	L	t	R*2/t	W	OK/NG
1	FR & 1st	5737.29	2578.37	3557.83	396.7	2028	0.75	16877539.078	1.5770	OK
2	1st & CTR	4957.16	6263.26	5534.19	388.7	2028	0.75	40836345.274	2.011	OK
3	CTR & 2nd	3996	10496	5788.29	444.7	2028	0.75	44672401.498	2.144	OK
4	2nd & RR	3279.69	14591.55	5355.61	864.42	2028	0.75	38243411.296	2.486	OK

conclusion:- From above tabular valus of W we can conclude that designed roof satisfies heat distortion croiteria.

Snow Load Prediction Formula:-

Qr = [Iy x t²] / [α x s x [(Rx + Ry)/2]² x 10^-8]

Judgment condition

Qr ≥ 3.1

sr.no	BOW's	Rx	Ry	S	Iy	t>2	((Rx+Ry)/2)>2	Lx	Ly	Y	My	a	Q	OK/NG
1	front bow	4509.55	2630.74	480.14	707.31	0.5625	16877539.078	1136.84	1948.26	491.67	716161.60	0.925	7.02	OK
2	centre bow	3767.56	6174.20	496.63	789.45	0.5625	40836345.274	1086.28	1948.26	960.29	948737.71	1.11	3.26	OK
3	rear bow	4267.76	10976.66	493.98	714.35	0.5625	44672401.498	1058.70	1948.26	1484.95	742475	0.809	1.73	NG

conclusion:- From above tabular valus of Q Satisfies for front & rear bows.but Q Value does not satisfy at central bow.to satisfy snow load at central bow we have to move central bow to satisfy Q judment value.

DRAFT ANALYSIS

1-Front roof rail :-

1-Rear roof rail :-

1-Front roof bow :-

2-Rear roof bow :-

3-Central roof bow :-

Conclusion:-

Green colour shows part tooling direction is feasible for manucturing.hence above draft analysis concludes that all above parts are feasible for manufacturing.