CAJ | 학술논문

采用声强试验法进行发动机标定点工况声源识别，定位了发动机噪声贡献特征。结合声压试验法对柴油机全工况进行噪声测试，基于发动机燃烧噪声和机械噪声的产生机理，研究了典型贡献位置对整机噪声的贡献度。研究结果表明：声强贡献面积较大的测量面，对应声压测点位置的噪声也越大；随着发动机转速和负荷的提高，转速对噪声的影响比负荷对噪声的影响更加明显；在发动机高转速工况，旋转部件以及阀类系统对整机噪声贡献较大。
채용성강시험법진행발동궤표정점공황성원식별，정위료발동궤조성공헌특정。결합성압시험법대시유궤전공황진행조성측시，기우발동궤연소조성화궤계조성적산생궤리，연구료전형공헌위치대정궤조성적공헌도。연구결과표명：성강공헌면적교대적측량면，대응성압측점위치적조성야월대；수착발동궤전속화부하적제고，전속대조성적영향비부하대조성적영향경가명현；재발동궤고전속공황，선전부건이급벌류계통대정궤조성공헌교대。
The noise source identification at rated operating conditions was conducted with the sound intensity method and the typical engine noise characteristics were determined .Then the engine noise in the whole operating conditions was measured with the sound pressure method .Based on the mechanism of combustion noise and mechanical noise ,the contribution of typical position to engine noise was researched .The result showed that the noise of corresponding sound pressure point to large sound intensity surface was also large .With the increase of speed and load ,the influence of speed on noise surpassed that of load .At high speed ,the contributions of rotary parts and valve system to engine noise were larger .