METHOD FOR ESTIMATING NOISE PERFORMANCE OF ROLLING TIRE
First Claim
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1. A computer-implemented method for estimating noise performance of a rolling tire, comprising:
- a tire model defining process in which a tire model, which is a finite element model of the tire and has a tread and grooves therein, is defined in a computer,a rough road surface model defining process in which a rough road surface model, which is a finite element model of a rough road surface, is defined in the computer,a rolling simulation process in which calculations of the tire model, which contacts with the rough road surface model and is rolling thereon, are performed,a coordinates data obtaining process in which coordinates data on node points appearing in the outer surface of the rolling tire model which data are obtained through the rolling simulation process, are stored in the computer as time-series coordinates data,a sound field defining process in whicha smooth road surface model, which is a finite element model of a smooth road surface,a tire outer surface model, which is the outer surface of the tire model defined by said coordinates data obtained, anda sound field in which airflow is possible and which encompasses at least a ground contacting part of the tire outer surface model and the corresponding part of the smooth road surface model,are defined in the computer,a noise simulation process in which physical quantities of the sound field are computed, rolling the tire outer surface model by the use of the time-series coordinates data.
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Abstract
A method for simulating a rolling tire and estimating its noise performance is disclosed, wherein a tire model rolling on a rough road surface model is simulated, and coordinates of node points appearing in the outer surface of the rolling tire model are stored as time-series coordinates data. A small gap is formed between a tire outer surface model defined by the time-series coordinates data and a smooth road surface model. Then, a sound field filled with air is defined including the gap, and pressure variations of the air are computed.
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Citations
10 Claims
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1. A computer-implemented method for estimating noise performance of a rolling tire, comprising:
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a tire model defining process in which a tire model, which is a finite element model of the tire and has a tread and grooves therein, is defined in a computer, a rough road surface model defining process in which a rough road surface model, which is a finite element model of a rough road surface, is defined in the computer, a rolling simulation process in which calculations of the tire model, which contacts with the rough road surface model and is rolling thereon, are performed, a coordinates data obtaining process in which coordinates data on node points appearing in the outer surface of the rolling tire model which data are obtained through the rolling simulation process, are stored in the computer as time-series coordinates data, a sound field defining process in which a smooth road surface model, which is a finite element model of a smooth road surface, a tire outer surface model, which is the outer surface of the tire model defined by said coordinates data obtained, and a sound field in which airflow is possible and which encompasses at least a ground contacting part of the tire outer surface model and the corresponding part of the smooth road surface model, are defined in the computer, a noise simulation process in which physical quantities of the sound field are computed, rolling the tire outer surface model by the use of the time-series coordinates data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification
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Current AssigneeSumitomo Rubber Industries Limited
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Original AssigneeSumitomo Rubber Industries Limited
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InventorsIMAMURA, Ao
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current703/6
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CPC Class CodesB60C 19/002 Noise damping elements prov...B60C 99/006 Computer aided tyre design ...G06F 2119/10 Noise analysis or noise opt...G06F 30/20 Design optimisation, verifi...G06F 30/23 using finite element method...
