FPLG整机声辐射影响规律试验研究
Experimental Study on the Influence Law of Sound Radiation of FPLG
为探究自由活塞直线发电机（FPLG）整机声辐射影响规律，开展噪声测试台架试验。通过LMS测试系统进行数据采集及处理，选择平行六面体测量面并安装7个传声器，针对某FPLG探究喷油脉宽、点火位置、喷油位置等参数变化对整机声辐射的影响规律。结果显示，在试验探究的范围内，整机运转时的声压级随喷油脉宽增加而增加，呈正相关；点火位置为27mm时，FPLG工作状况最佳，整机声压级为107.2dB；喷油位置为39mm时，整机声压级明显高于对照组，达到105.6dB。对比得到，喷油位置对FPLG整机声辐射的影响最大，其次是点火位置和喷油脉宽，试验可以为降低整机噪声提供参考。
In order to investigate the effect of sound radiation on free-piston linear generator (FPLG), the noise test bench test was carried out. The LMS test system was used for data acquisition and processing, and 7 microphones were installed and a parallelohedron measuring surface was selected to explore the influence of parameters such as injection pulse width, ignition position and injection position on the sound radiation of a certain FPLG. The results show that the sound pressure level increases with the increase of injection pulse width in the range of experiment, and has a positive correlation. When the ignition position is 27mm, the FPLG works best and the sound pressure level is 107.2dB. When the injection position is 39mm, the sound pressure level of the whole machine is significantly higher than that of the control group, reaching 105.6dB. The results show that the injection position has the greatest influence on the sound radiation of FPLG, followed by the ignition position and injection pulse width. The test can provide reference for reducing the noise of FPLG.
吴国澳;冯慧华;易晨坤;
北京理工大学 机械与车辆学院,北京100081;北京理工大学 机械与车辆学院,北京100081;北京理工大学 机械与车辆学院,北京100081;
TK417
Free piston linear generator noise test Influence law
1-7 / 7
评论