Page 554 - Automotive Engineering Powertrain Chassis System and Vehicle Body

Standard sedan (saloon) – baseline load paths C HAPTER 16.2

Z
R ZXR /2
Y
X /2
F x
F xpr /2
F /2
x
/2
F xpf
F xpr /2
R XR /2
R ZXF /2
R ZYR /2
/2 F /2
F xpt xpf
F xpt /2
R XR /2
R ZXF /2
R /2
XF
/2
R XF
Fig. 16.2-29 Baseline model – braking loads.
R ZXF ¼ R ZXR
Moments about the lower rear corner
¼fF xpt ðh pt þ h Þþ F xpf ðh þ h Þ R ZXF l 1 =2 F xpt h pt =2 R XF h =2 P h 1 ¼ 0
pf
f
00
f
þ F xpr ðh pr þ h Þþ F ðh þ h Þg=L f 4 (16.2.61)
f
f
l
xl
(16.2.58)
00
00
00
Hence P ; P and P are obtained:
5
3
4
The loading on the front structure (Fig. 16.2-31)is
now known so applying the equations of statics to each
of the SSSs. 16.2.5.2 Dash panel (5)
16.2.5.1 Inner wing panels (3) and (4) Resolving forces vertically and by symmetry
00
00
2P 2P ¼ 0 (16.2.62)
The inertia forces from the power-train F xpt /2 are 6 3
assumed to act into each of the inner wing panels.
16.2.5.3 Front parcel shelf (6)
00
Resolve forces vertically R ZXF =2 P 0 (16.2.59)
3
Resolve forces horizontally Resolving forces horizontally
00
00
R XF =2 F xpt =2 P þ P ¼ 0 (16.2.60) 2P 2P ¼ 0 (16.2.63)
00
00
5
4
4
7
l 6 l 7 l 8
F xpf F xpr F x
F xpt
h pf h pr h
h pt
R ZXF h f R ZXR
R XF R XR
L

Fig. 16.2-30 Baseline model (side view) – braking loads.

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