Prediction of tire tread vibration that propagates on tire is important for developing low-noise ... more Prediction of tire tread vibration that propagates on tire is important for developing low-noise tire structure. To obtain reasonable results, excitation input model is necessary that can represent real excitations caused by tread-road surface contact and is simple enough. In this study, stress distribution on a tire belt was calculated by FEM non-linear contact analyses. The loading conditions of this FEA were measured tread surface displacements pushed by small spheres that represent pavement shingles. To make the results of this analysis easy to be used in vibration analysis, the stress distribution was modeled with Gaussian functions that are either standing alone or connected with each other according to shingle geometrical distribution on pavement. The results show that the stress distribution shapes on the steel belt, which should be similar to excitation force waveforms, are functions of tread rubber block thickness, width and stiffness. To prove this excitation model, measu...
The Proceedings of Mechanical Engineering Congress, Japan, 2019
Maintenance and management of road network as public asset across the nation at low cost is urgen... more Maintenance and management of road network as public asset across the nation at low cost is urgent and vital. Repair costs can be reduced if the slight deterioration on the road surface is detected in early stage, and the construction period can be shortened. In this report, a measuring system using acoustic signal emitted by tire-road contact is disclosed as a potential solution for this. The system has a microphone in a tire cavity that sends signal via radio wave to a receiver/controller on board while driving on road. This system is affected neither by the vehicle vibration characteristics nor by rain or dust. This system enables us to collect road surface roughness data covering the whole road system twenty-four hours by a number of privately owned vehicles instead of special vehicles. The results both on a chassis dynamometer and actual roads are disclosed.
Prediction of tire tread vibration that propagates on tire is important for developing low-noise ... more Prediction of tire tread vibration that propagates on tire is important for developing low-noise tire structure. To obtain reasonable results, excitation input model is necessary that can represent real excitations caused by tread-road surface contact and is simple enough. In this study, stress distribution on a tire belt was calculated by FEM non-linear contact analyses. The loading conditions of this FEA were measured tread surface displacements pushed by small spheres that represent pavement shingles. To make the results of this analysis easy to be used in vibration analysis, the stress distribution was modeled with Gaussian functions that are either standing alone or connected with each other according to shingle geometrical distribution on pavement. The results show that the stress distribution shapes on the steel belt, which should be similar to excitation force waveforms, are functions of tread rubber block thickness, width and stiffness. To prove this excitation model, measu...
The Proceedings of Mechanical Engineering Congress, Japan, 2019
Maintenance and management of road network as public asset across the nation at low cost is urgen... more Maintenance and management of road network as public asset across the nation at low cost is urgent and vital. Repair costs can be reduced if the slight deterioration on the road surface is detected in early stage, and the construction period can be shortened. In this report, a measuring system using acoustic signal emitted by tire-road contact is disclosed as a potential solution for this. The system has a microphone in a tire cavity that sends signal via radio wave to a receiver/controller on board while driving on road. This system is affected neither by the vehicle vibration characteristics nor by rain or dust. This system enables us to collect road surface roughness data covering the whole road system twenty-four hours by a number of privately owned vehicles instead of special vehicles. The results both on a chassis dynamometer and actual roads are disclosed.
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