To evaluate a contribution of oscillation on a tire surface to sound radiation generating from tires in a rolling motion.SOLUTION: An evaluation method of sound radiation from tires includes the steps of: obtaining a relationship between a sound at a sound source location and tire surface oscillation thereat from a signal of the sound at the sound source location when acoustically oscillating a tire surface standing still by the sound from the sound source, and a signal obtained by measuring the tire surface oscillation generating due to the acoustic oscillation at an oscillation measurement location; causing the tire to roll, and measuring the tire surface oscillation in a rolling motion at the oscillation measurement location, and measuring sound radiation from the tire in the rolling motion at the sound source location; obtaining a calculatory signal at a sound source location of the sound arising from the tire surface oscillation in the rolling motion from a signal of the tire surface oscillation in the rolling motion, and the relationship; and obtaining a ratio of the signal of the sound radiation from the tire in the rolling motion measured at the sound source position, and the calculatory signal at the sound source position of the sound arising from the tire surface oscillation in the rolling motion measured at the sound source position.SELECTED DRAWING: Figure 2
【課題】転動中のタイヤから発生する放射音への、タイヤ表面の振動の寄与を評価する。【解決手段】静止中のタイヤ表面を音源位置からの音により音響加振したときの音源位置での音の信号と、音響加振により生じたタイヤ表面振動を振動測定位置において測定して得られた信号とから、前記音源位置での音とタイヤ表面振動との関係を求める工程と、タイヤを転動させ、転動中のタイヤ表面振動を振動測定位置で測定するとともに、転動中のタイヤからの放射音を音源位置で測定する工程と、転動中のタイヤ表面振動の信号と前記関係とから、転動中のタイヤ表面振動に起因する音の音源位置での計算上の信号を求める工程と、音源位置で測定された転動中のタイヤからの放射音の信号と、転動中のタイヤ表面振動に起因する音の音源位置での計算上の信号との比を求める工程とを含む、タイヤからの放射音の評価方法。【選択図】図2
TIRE SOUND RADIATION EVALUATION METHOD
タイヤ放射音の評価方法
2021-06-17
Patent
Electronic Resource
Japanese
IPC: | G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B60C VEHICLE TYRES , Fahrzeugreifen / G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen |
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