CAJ | 학술논문

通过整车车内噪声测试并对副车架进行模态分析，明确得出转速2400 r/min附近车内轰鸣噪声来源是发动机2阶激励与前副车架第1阶模态产生共振。设计动力吸振器，再进行动力吸振器参数优化，提出抑制前副车架共振的工程方案。通过试验验证，该方案基本消除车内轰鸣噪声，改善整车NVH特性。
통과정차차내조성측시병대부차가진행모태분석，명학득출전속2400 r/min부근차내굉명조성래원시발동궤2계격려여전부차가제1계모태산생공진。설계동력흡진기，재진행동력흡진기삼수우화，제출억제전부차가공진적공정방안。통과시험험증，해방안기본소제차내굉명조성，개선정차NVH특성。
Results of the interior noise measurement and modal test of a secondary car frame are used to diagnose the contribution of the cabin booming noise. It is found that the resonance between the second order excitation of the engine and the first order modal of the secondary car frame at the 2 400 r/min speed leads to the cabin booming noise. On this basis, a tuned mass damper with optimal parameters is designed to reduce the booming noise. Road test proves the effectiveness of the engineering proposal.