Environmental Engineering Reference
In-Depth Information
Sandwich panel
Face
Adhesive layer
Core
Flange load-carrying laminate compression
Adhesive
joint
Adhesive
joint
Web sandwich
Flange load-carrying laminate-tension
Cross-section principal rotoblade with different construction elements
FIGURE 2.4
Cross-section. principal. with. rotor. blade. with. different. blade. construction. elements.. (From.
TPI. Composites,. Inc..
20 percent energy by 2030
.. Online. at. www.20percentwind.org.. With.
permission.)
Cross-section. principal. with. rotor. blade. with. different. blade. construc-
tion. elements. is. shown. in. Figure 2.4.. The. thickness. shell. has. been. car-
ried.to.the.load.of.the.blade.and.adhesive.layers.transfer.this.load.to.the.
web.beams.
5
.The.parts.design.section.of.the.turbine.blade.can.be.seen.in.
Figure 2.5,.And,.the.power.turbine.blade.with.coordinate.system.is.shown.
in.Figure 2.6.
2.5.1
Theoretical Investigation
In. the. linear. performance. relationship. between. acting. forces. and. linear.
deformation.in.matrix.form,.the.following.was.established:
Fz, Fy Q
Q x
Q
Q
ε
ε
ε
ε
R
εθ
R
M
Q
Qx
Q
Q
x
z
x
ε
xR
x
θ
.
.
(2.11)
R
M
Q
Q x
Q
Q
y
R
ε
R
R
R
θ
R
R
M
Q
Q x
Q y
Q
x
θε
θ
θ
θ
θ
Here:
R,.θ,.X.. =.current.polar.coordinates;
ε,ϒx,ϒ
R
,ϒ
θ
=.current.deformation.existing.from.the.acting.forces.Fz,.Fy.and.
bending.moments.Mz,.My,.and.torsion.moment.Mx;.Qki.=.coeficient.
of.stiffness.in.polar.coordinates;.a.Qki.=.Qik.(k,I.=.ε,.x,.R,.θ).
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