Method for predicting tyre running noise
View Patent ↗In a method for predicting a rolling noise B of a tire on a pavement, a real profile of the pavement is charted, at least one value of at least one descriptor of the pavement is determined based on the real profile, and use is made of a law for predicting rolling noise B of a tire. The law is of a type given by B=g(V 1 , . . . , V n ), where V 1 , . . . , V n are values of descriptors D 1 , . . . , D n of the pavement, where 1≦n≦2, where D 1 is a characteristic number of indenters of the pavement, and where D 2 is a characteristic dimension of the indenters of the pavement.
1. A pavement design method based on a prediction of a rolling noise B of a tyre on a roadway pavement, the method comprising steps of:
obtaining a measurement of a surface of the pavement, the measurement providing data of a real profile of the pavement;
filtering the data of the real profile, using a computer, to extract pavement descriptors N and R, in which:
N is a value of a characteristic number of indenters per unit area of the pavement, and
R is a value of a characteristic dimension of indenters of the pavement;
calculating the prediction of the rolling noise B of the tyre, using the computer, by utilizing information extracted in the filtering step in a law given by:
B
=
20
log
[
(
R
Ro
)
1
5
(
No
N
)
3
5
(
C
Co
)
k
(
0.75
1
-
v
2
E
Eo
)
1
5
]
+
Bo
,
in which
C is a rolling speed of the tyre,
E is a stiffness modulus of a rubber of the tyre,
v is a Poisson's ratio of the rubber of the tyre,
k is a value in an interval from 1.2 to 2, and
Ro, No, Co, Eo, and Bo are reference values; and
utilizing the prediction of the rolling noise B of the tyre calculated in the calculating step to modify a process for manufacturing pavement.
2. The method according to claim 1 , wherein:
at least one law of variation of at least one pavement descriptor is determined based on the real profile, as a function of a variable parameter of the real profile,
an interaction value of each of the at least one pavement descriptor is determined at an interaction value of the variable parameter, for each law of variation, and
a value of the prediction of the rolling noise B of the tyre is calculated based on an interaction value of the at least one pavement descriptor.
3. The method according to claim 2 , wherein the real profile is sectioned into plural strata, each stratum corresponding to an altitude of the real profile, such that:
the law of variation of each of the at least one pavement descriptor is determined as a function of an altitude of the real profile,
the at least one pavement descriptor includes at least one virtual pavement descriptor, and
the interaction value of each of the at least one virtual pavement descriptor is determined at an interaction value of the altitude, for the law of variation of each of the at least one pavement descriptor.
4. The method according to claim 1 , wherein:
the at least one pavement descriptor includes at least one real pavement descriptor of indenters of the pavement,
the method includes a step of determining an interaction value of each of the at least one real pavement descriptor, and
a value of the prediction of the rolling noise B the tyre is calculated based on an interaction value of the at least one real pavement descriptor.
5. The method according to claim 4 , wherein, the at least one real pavement descriptor includes a number of real indenters per unit area of the pavement, in which a value N is an interaction value of the number of real indenters per unit area of the pavement.
6. The method according to claim 5 , wherein the interaction value of the number of real indenters per unit area of the pavement is a maximum value of a law of variation of the number of real indenters per unit area of the pavement.
7. The method according to claim 4 , wherein:
the at least one real descriptor includes at least one virtual pavement descriptor of virtual indenters of the pavement for modelling real indenters of the pavement;
an interaction value of each of the at least one virtual pavement descriptor is determined based on:
a law of interaction between the tyre and the pavement, and
a law of variation of the virtual indenters of the pavement, and
a value of the prediction of the rolling noise B of the tyre is calculated based on an interaction value of the at least one virtual pavement descriptor.
8. The method according to claim 7 , wherein
the virtual indenters of the pavement are represented by identical spheres for each value of a variable parameter,
the at least one virtual pavement descriptor includes a radius of the spheres, and
a value of N is an interaction value of the radius of the spheres.
9. The method according to claim 1 , wherein the method is performed using a computer program with code instructions executed on a computer.
10. A pavement design method based on a prediction of a rolling noise B of a tyre on a roadway pavement, the method comprising steps of:
obtaining a measurement of a surface of the pavement, the measurement providing data of a real profile of the pavement;
filtering the data of the real profile, using a computer, to extract pavement descriptors N and R, in which:
N is a value of a characteristic number of indenters per unit area of the pavement, and
R is a value of a characteristic dimension of indenters of the pavement;
calculating the prediction of the rolling noise B of the tyre, using the computer, by utilizing information extracted in the filtering step in a law given by:
B
=
20
log
[
(
R
Ro
)
1
5
(
No
N
)
3
5
(
C
Co
)
k
]
+
Bo
′
,
in which
C is a rolling speed of the tyre,
k is a value in an interval from 1.2 to 2, and
Ro, No, Co, and Bo′ are reference values; and
utilizing the prediction of the rolling noise B of the tyre calculated in the calculating step to modify a process for manufacturing pavement.
11. A pavement design method based on a prediction of a rolling noise B of a tyre on a roadway pavement, the method comprising steps of:
obtaining a measurement of a surface of the pavement, the measurement providing data of a real profile of the pavement;
filtering the data of the real profile, using a computer, to extract a pavement descriptor N, in which N is a value of a characteristic number of indenters per unit area of the pavement;
calculating the prediction of the rolling noise B of the tyre, using the computer, by utilizing information extracted in the filtering step in a law given by:
B
=
20
log
[
(
No
N
)
3
5
(
C
Co
)
k
]
+
Bo
″
,
in which
C is a rolling speed of the tyre,
k is a value in an interval from 1.2 to 2, and
No, Co, and Bo″ are reference values; and
utilizing the prediction of the rolling noise B of the tyre calculated in the calculating step to modify a process for manufacturing pavement.
12. A pavement design method based on a prediction of a rolling noise B of a tyre on a roadway pavement, the method comprising steps of:
obtaining a measurement of a surface of the pavement, the measurement providing data of a real profile of the pavement;
filtering the data of the real profile, using a computer, to extract a pavement descriptor N, in which N is a value of a characteristic number of indenters per unit area of the pavement;
calculating the prediction of the rolling noise B of the tyre, using the computer, by utilizing information extracted in the filtering step in a law given by:
B
=
20
log
[
(
No
N
)
3
5
(
C
Co
)
k
(
0.75
1
-
v
2
E
Eo
)
1
5
]
+
Bo
′′′
,
in which
C is a rolling speed of the tyre,
E is a stiffness modulus of a rubber of the tyre,
v is a Poisson's ratio of the rubber of the tyre,
k is a value in an interval from 1.2 to 2, and
No, Co, Eo and Bo″′ are reference values; and
utilizing the prediction of the rolling noise B of the tyre calculated in the calculating step to modify a process for manufacturing pavement.
13. A pavement design method based on a prediction of a rolling noise B of a tyre on a roadway pavement, the method comprising steps of:
obtaining a measurement of a surface of the pavement, the measurement providing data of a real profile of the pavement;
filtering the data of the real profile, using a computer, to extract pavement descriptors N and R, in which:
N is a value of a characteristic number of indenters per unit area of the pavement, and
R is a value of a characteristic dimension of indenters of the pavement;
calculating the prediction of the rolling noise B of the tyre, using the computer, by utilizing information extracted in the filtering step in a law given by:
B
=
20
log
[
(
R
Ro
)
1
5
(
No
N
)
3
5
]
+
Bo
′′′′
,
in which
Bo″″ is a reference value; and
utilizing the prediction of the rolling noise B of the tyre calculated in the calculating step to modify a process for manufacturing pavement.
14. A non-transitory computer-readable recording medium storing code instructions that, when executed by a computer, causes the computer to perform a pavement design method based on a prediction of a rolling noise B of a tyre on a roadway pavement, the method comprising steps of:
filtering data of a real profile of the pavement, the data being obtained by measurement of a surface of the pavement, to extract pavement descriptors N and R, in which:
N is a value of a characteristic number of indenters per unit area of the pavement, and
R is a value of a characteristic dimension of indenters of the pavement;
calculating the prediction of the rolling noise B of the tyre by utilizing information extracted in the filtering of the data in a law given by:
B
=
20
log
[
(
R
Ro
)
1
5
(
No
N
)
3
5
(
C
Co
)
k
(
0.75
1
-
v
2
E
Eo
)
1
5
]
+
Bo
,
in which
C is a rolling speed of the tyre,
E is a stiffness modulus of a rubber of the tyre,
v is a Poisson's ratio of the rubber of the tyre,
k is a value in an interval from 1.2 to 2, and
Ro, No, Co, Eo, and Bo are reference values; and
utilizing the prediction of the rolling noise B of the tyre, as calculated in the calculating of the prediction of the rolling noise B of the tyre, to modify a process for manufacturing pavement.
15. A pavement design method based on a prediction of a rolling noise B of a tyre on a roadway pavement, the method comprising steps of:
installing, on a first computer connected to a telecommunications network, computer code that includes:
filtering data of a real profile of the pavement, the data being obtained by measurement of a surface of the pavement, to extract pavement descriptors N and R, in which:
N is a value of a characteristic number of indenters per unit area of the pavement, and
R is a value of a characteristic dimension of indenters of the pavement;
calculating the prediction of the rolling noise B of the tyre by utilizing information extracted by the computer code for the filtering of the data in a law given by:
B
=
20
log
[
(
R
Ro
)
1
5
(
No
N
)
3
5
(
C
Co
)
k
(
0.75
1
-
v
2
E
Eo
)
1
5
]
+
Bo
,
in which
C is a rolling speed of the tyre,
E is a stiffness modulus of a rubber of the tyre,
v is a Poisson's ratio of the rubber of the tyre,
k is a value in an interval from 1.2 to 2, and
Ro, No, Co, Eo, and Bo are reference values;
enabling the computer code to be downloaded by a second computer connected to the telecommunications network; and
utilizing the prediction of the rolling noise B of the tyre, as calculated by the computer code for the calculating of the prediction of the rolling noise B of the tyre, to modify a process for manufacturing pavement.