CAJ | 학술논문

分析某直型辐板车轮是否喷涂阻尼材料的振动声辐射特性，通过力锤敲击试验，获得车轮的固有频率、模态阻尼比及频率响应函数，分析喷涂式阻尼车轮振动特性，通过半消声室声辐射测试，给出喷涂式阻尼车轮的声能量级，结合车轮振动分析声辐射特性。结果表明喷涂式阻尼车轮可以有效降低车轮振动和声能量级，与裸轮相比，径向激励下总声能量级可降低6.4 dB，轴向激励下总声能量级可降低4.3 dB。
분석모직형복판차륜시부분도조니재료적진동성복사특성，통과력추고격시험，획득차륜적고유빈솔、모태조니비급빈솔향응함수，분석분도식조니차륜진동특성，통과반소성실성복사측시，급출분도식조니차륜적성능량급，결합차륜진동분석성복사특성。결과표명분도식조니차륜가이유효강저차륜진동화성능량급，여라륜상비，경향격려하총성능량급가강저6.4 dB，축향격려하총성능량급가강저4.3 dB。
This paper analyzes the vibration and sound radiation characteristics of a straight web railway wheel with and without sprayed damping material. The natural frequencies, damping ratios and frequency response function (FRF) are obtained through the test by using force hammer excitation. The sound energy level (SEL) is obtained through the test of sound radiation in the semi-anechoic room, and is analyzed with vibration characteristics. The analysis results show that the FRF and SEL of the damped wheel reduce efficiently. The SEL of the damped wheel in the overall range in radial and axial excitations are, respectively, 6.4 dB and 4.3 dB less than those of the naked one.