CAJ | 학술논문

以某款SUV车用油箱为研究对象，采用流-固耦合有限元和边界元分析方法，在Virtual ．Lab仿真平台上分别对油箱的干模态、湿模态以及装满燃油时的流-固耦合模态进行仿真计算，得到3种情况下的油箱模态频率变化规律，并给油箱施加一定频率范围的激励力，研究其对外辐射噪声水平。结果表明，油箱干模态和湿模态的频率相差不大，而装入燃油后油箱的耦合模态频率大幅降低，油箱对外辐射噪声的高频成分得到很大衰减，但低频噪声成分有所增加。
이모관SUV차용유상위연구대상，채용류-고우합유한원화변계원분석방법，재Virtual ．Lab방진평태상분별대유상적간모태、습모태이급장만연유시적류-고우합모태진행방진계산，득도3충정황하적유상모태빈솔변화규률，병급유상시가일정빈솔범위적격려력，연구기대외복사조성수평。결과표명，유상간모태화습모태적빈솔상차불대，이장입연유후유상적우합모태빈솔대폭강저，유상대외복사조성적고빈성분득도흔대쇠감，단저빈조성성분유소증가。
Taking the fuel tank of a certain model of SUV as the research object ,this paper ,using flu-id-solid coupling finite element and boundary element methods ,simulated and calculated on Virtual . Lab simulation platform the dry mode ,wet mode and fluid-solid coupled mode of the fuel tank when it is full of fuel .Having obtained three modal frequencies of the tank ,it applied excitation forces within a range of frequency to the tank for the investigation of its outgoing radiant noise level .The results show that there is no obvious difference between the dry modal frequency and wet modal frequency of the tank ,but w hen the tank is full of fuel ,its coupled modal frequency decreases considerably and the high frequency component of outgoing noise radiated by the tank is greatly attenuated while the low frequency component of the noise increases due to the decrease of modal frequency ,.