CAJ | 학술논문

汽车的噪声、振动和舒适度（NVH）是衡量汽车制造质量的一个综合性技术指标，尤其体现为驾驶室的振动噪声水平。采用统计能量分析法（SEA）原理对某一型号农用收割机的驾驶室进行噪声预测分析，并对SEA的建模有效性进行实验验证。研究结果表明：在低频域，驾驶室背板的振动是引起驾驶室噪声的主要因素，而在高频段，驾驶室噪声水平则主要取决于外部噪声。对此，可采用增加壁板结构阻尼的方法来有效拟制驾驶室内部低频噪声，同时通过增加驾驶室壁板厚度等方法降低驾驶室内的低频噪声。另外，减少各个子系统连接间的泄漏也是改善高频噪声的一个有效途径。
기차적조성、진동화서괄도（NVH）시형량기차제조질량적일개종합성기술지표，우기체현위가사실적진동조성수평。채용통계능량분석법（SEA）원리대모일형호농용수할궤적가사실진행조성예측분석，병대SEA적건모유효성진행실험험증。연구결과표명：재저빈역，가사실배판적진동시인기가사실조성적주요인소，이재고빈단，가사실조성수평칙주요취결우외부조성。대차，가채용증가벽판결구조니적방법래유효의제가사실내부저빈조성，동시통과증가가사실벽판후도등방법강저가사실내적저빈조성。령외，감소각개자계통련접간적설루야시개선고빈조성적일개유효도경。
Noise, vibration and harshness (NVH) is a comprehensive measure of the quality of automobiles. Especially, the cabin noise level is an important index which can represent the quality of the vehicles. In the present paper, the Statistical Energy Analysis (SEA) modeling technique was employed to analyze and predict the interior cabin noise of an agricultural harvester. The validity of the SEA model was verified by in-situ measurements. The results reveal that for the agricultural harvester, the vibration of the back wallboard of the cabin is the main source of its interior noise in the low frequency range. While for the high frequency range the interior noise of the cabin is mainly associated with the exterior noise. Consequently, increasing the structural damping and the thickness of the back wallboard can effectively reduce the internal noise level at low frequencies. In addition, decreasing the leakage of subsystem’s junctions is another effective way for reducing the high frequency cabin noise.