FORMULA ANGKA STABILITAS UNIT LAPIS LINDUNG PEMECAH GELOMBANG TIPE GELOMBANG TAK PECAH
ABSTRACT: The objective of
research is to evaluate variables that influence the stability number of
breakwater armor units (Ns), such as
height of wave, wave period, wave angle direction, layer coefficient,
and porosity. While the aim of this research is to find a new Number stability
formula,that is (Hs/ΔDn or Ns ), at
non breaking wave, that can be applied on all type of breakwater
armor units. The research used undistorted physical model methode. Furthermore,
wave data is analyzed using Zero up crossing and regression analysis using least square methode. Mat Lab software version 6.5. is used as a tool
in analysis. The result of this research is stability number of breakwater
armor units (Ns) for non-broken wave, that is Ns = 0,0874 oP -4,1580 d 0,0486
N-0,0278 C 7,3935(cos )0,5385 z -0,4640 Then
the evaluation result is compared with
the existing formula, such as Hudson
formula and Vander Meer formula, with
armor units material
are stones, cube,
tetrapod and dolos.
It can be
seen that in
new formula, stability
number (Ns) is the
smalest number, therefore
it is the
most reliable or
optimal, if compared
with Vander Meer
formula, and Hudson. The
formula is applied
for slope angle
of the structure(cot
1,5), until slope
angle of the
structure (cot 3).
The result also shows that the number of stability being bigger, in a
row to the number of (H/L) value, and being smaller in increasing angle wave
direction for slope (cot 1,5), (cot 2,5) and (cot 3).
Penulis: Sriyana
Kode Jurnal: jptsipildd090017
