D was a Spanish civil engineer and professor of ports at the School of Civil Engineering in Madrid.
Photos 9
![Graph illustrating the required weight of armourstone (in tonnes) against the slope (α) of a breakwater. The relationship is governed by the Iribarren formula:
P
=
N
×
A
3
×
d
(
cos
(
α
)
−
sin
(
α
)
)
3
×
(
d
−
1
)
3
{\displaystyle P={\frac {N\times A^{3}\times d}{(\cos(\alpha )-\sin(\alpha ))^{3}\times (d-1)^{3}}}}
The weight of the armourstone is proportionally related to the cube of the wave height, emphasising the significant increase in stone weight as wave height increases.[37]](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Armourstone_Weight_vs_Slope.png/500px-Armourstone_Weight_vs_Slope.png)
Graph illustrating the required weight of armourstone (in tonnes) against the slope (α) of a breakwater. The relationship is governed by the Iribarren formula:
P
=
N
×
A
3
×
d
(
cos
(
α
)
−
sin
(
α
)
)
3
×
(
d
−
1
)
3
{\displaystyle P={\frac {N\times A^{3}\times d}{(\cos(\alpha )-\sin(\alpha ))^{3}\times (d-1)^{3}}}}
The weight of the armourstone is proportionally related to the cube of the wave height, emphasising the significant increase in stone weight as wave height increases.[37]
Graph showing the relationship between density
d
{\displaystyle d}
and coefficient for use in the Iribarren formula. The curves represent coefficients calculated for Rock armourstone
N
=
0.015
{\displaystyle N=0.015}
and Concrete blocks
N
=
0.019
{\displaystyle N=0.019}
.
Graph comparing results using early breakwater formulas (Castro Pascual-Briones, Iribarren and Hudson) for a 1:3 slope using 2.6t/m3 rock
Equilibrium of loose rock in a breakwater, as the basis for stability analysis in the Iribarren formulaAwards 3
About this person
Ramón Iribarren Cavanilles Ing.D was a Spanish civil engineer and professor of ports at the School of Civil Engineering in Madrid. He was chairman of the Spanish delegation to the Permanent International Association of Navigation Congresses and was elected as an academic at the Spanish Royal Academy of Sciences, although he did not take up the latter position. He made notable contributions in the field of coastal engineering, including methods for the calculation of breakwater stability and research which led to the development of the Iribarren number.
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