1. MOMENTY BEZWŁADNOŚCI WZGLĘDEM OSI YZ ORAZ MOMENTY ODŚRODKOWE FIGUR SKŁADOWYCH.
Iy1 = $\frac{36cm\ \times \ 37cm3}{3}$ = 607836,000cm4
Iz1 = $\frac{37cm\ \times \ 36cm3\ }{3}$ = 575424,000cm4
Iy2 = 13cm4 × $(\frac{\Pi}{16}$ - $\frac{4}{9\Pi})$ + 132,732cm2 × ($\frac{4}{3\Pi}$ × 13)2 = 5607,930cm4
Iz2 = 13cm4 × $(\frac{\Pi}{16}$ - $\frac{4}{9\Pi})$ + 132,732cm2 × ($31 - \frac{4}{3\Pi}$ × 13)2 = 87758,815cm4
Iy3 = $\frac{10cm\ \times \ 26cm3}{36}$ + 130cm2 × (45,667cm)2 = 275993,958cm4
Iz3 = $\frac{26cm\ \times \ 10cm3}{36}$ + 130cm2 × (29,333cm)2 = 112577,458cm4
Iyz1 = 1332,000cm2 × 18,5cm ×18cm = 443556cm4
Iyz2 = 134cm × -[$(\frac{1}{8}$ - $\frac{4}{9\Pi}$)] + 132,732cm2 × $\frac{4}{3\Pi}$ × 13cm × 25,483cm = 19132,440cm4
Iyz3 = - $\frac{10cm2\ \times \ 26cm2}{72}$ + 130cm2 × 45,667cm × 29,333cm = 173202,626cm4
2. MOMENTY BEZWŁADNOŚCI CAŁEJ FIGURY WZGLĘDEM OSI YZ.
Iy = Iy1 + Iy3 - Iy2 = 607836,000cm4 + 275910,850cm4 - 5607,930cm4 = 878138,920cm4
Iz = Iz1 + Iz3 - Iz2 = 575424,000cm4 + 112554,579cm4 - 87758,815cm4 = 600219,764cm4
Iyz = Iyz1 + Iyz3 – Iyz2 = 443556cm4 + 173202,626cm4 – 19132,440cm4 = 597626,186cm4
3. MOMENTY BEZWŁADNOŚCI WZGLĘDEM OSI CENTRALNYCH RÓWNOLEGŁYCH DO OSI YZ.
Iy0 = Iy – A × z02 = 878138,920cm4 – 1329,268cm2 × 22,4502cm = 208184,525cm4
Iz0 = Iz – A × y02 = 600219,764cm4 – 1329,268cm2 × 18,3622cm = 152039,719cm4
Iy0z0 = Iyz – A × y0 × z0 = 597626,186cm4 – 1329,268cm2 × 18,362cm × 22,453cm = 49592,935cm4
4. POŁOŻENIE OSI GŁÓWNYCH (Rys 3).
tg (2ø0) = $\frac{2\ \times \ Iy0z0}{Iz0 - Iy0}$ = $\frac{2\ \times \ 49592,935cm4\ }{152039,719cm4\ - \ 208184,525cm4\ }$ = - 1,767 stąd 2ø0 = -60,49 °
Kąt ø0 mierzony przeciwnie do ruchu wskazówek zegara ø0 = - 30,24 °
5. MOMENTY BEZWŁADNOŚCI WZGLĘDEM ŚRODKOWYCH OSI GŁÓWNYCH.
Imax,min = $\frac{Iy0 + Iz0}{2}\ $± $\sqrt{\left( \frac{Iy0\ \ Iz0}{2} \right)}$2 + Iy0z02 gdzie;
$\frac{Iy0 + Iz0}{2}$ = $\frac{208184,525cm4\ + 152039,719cm4\text{\ \ }}{2}$ = 180112,122cm4
$\sqrt{\left( \frac{Iy0\ \ Iz0}{2} \right)}$2 + Iy0z02 = $\sqrt{\left( \frac{208184,525cm4\ - \ 152039,719cm4\text{\ \ }}{2} \right)} +$ 49592,9352 cm = 49593,218cm4
Imax = Iyg = 180112,122cm4 + 49593,218cm4 = 229705,340cm4
Imin = Izg = 180112,122cm4 - 49593,218cm4 = 130518,904cm4
6. KONTROLA NIEZMIENNIKÓW
Iyo + Izo = Iyg + Izg
208184,525cm4 + 152039,719cm4 = 229705,340cm4 + 130518,904cm4
360224,244cm4 = 360224,244cm4
BŁĄD WZGLĘDNY
$\frac{Iyg + Izg - (Iyo\ + Izo)}{Iyo\ + Izo}$ = $\frac{360224,244cm4\ - \ 360224,244cm4\text{\ \ }}{360224,244cm4}$ = 0%
Iyo × Izo – Iyozo2 = Iyg × Izg
Iyo × Izo – Iyozo2 = 208184,525cm4 × 152039,719cm4 – (49592,935cm4)2 = 31652267088,213cm8
Iyg × Izg = 229705,340cm4 × 130518,904cm4 = 29980889219,747cm8
BŁĄD WZGLĘDNY
$\frac{Iyo\ \times \ Izo\ \ Iyozo2 - \ Iyg\ \times Izg\ }{Iyo\ \times \ Izo\ \ Iyozo2}$ = $\frac{31652267088,213cm8\ - \ 29980889219,747cm8\ }{31652267088,213cm8}$ = 1,668 × 10-12 ≈ 0