3d布置与9点布置对发动机声功率测量的不确定度影响
发布时间:2019-05-11 11:34
【摘要】:通过对不同测距3d布置与9点布置的测点布置不确定度的试验研究及试验室环境修正的测量,建立了测点布置不确定度、试验室环境修正与声功率级不确定度的关系式,比较了3d布置及9点布置的声功率级测量不确定度。研究结果表明:验证样机采用3d布置所有测距测量不确定度均满足工程法要求;采用9点布置较小测距时,测量不确定度大于1.5dB,不满足工程法要求;3d布置环境适用范围优于9点布置。
[Abstract]:Based on the experimental study on the uncertainty of 3-day and 9-point arrangement of measurement points and the measurement of laboratory environment correction, the relationship between uncertainty of measurement point arrangement, laboratory environment correction and the uncertainty of sound power level is established, and the relationship between the uncertainty of measurement point arrangement and the uncertainty of sound power level is established. The uncertainty of sound power level measurement between 3D arrangement and 9 point arrangement is compared. The results show that the 3D layout of the prototype meets the requirements of the engineering method, and the measurement uncertainty is more than 1.5 dB when the 9-point arrangement is small, which does not meet the requirements of the engineering method. The applicable range of 3D layout environment is better than that of 9 points layout.
【作者单位】: 上汽集团商用车技术中心;上海大众汽车有限公司;
【分类号】:TK406
本文编号:2474457
[Abstract]:Based on the experimental study on the uncertainty of 3-day and 9-point arrangement of measurement points and the measurement of laboratory environment correction, the relationship between uncertainty of measurement point arrangement, laboratory environment correction and the uncertainty of sound power level is established, and the relationship between the uncertainty of measurement point arrangement and the uncertainty of sound power level is established. The uncertainty of sound power level measurement between 3D arrangement and 9 point arrangement is compared. The results show that the 3D layout of the prototype meets the requirements of the engineering method, and the measurement uncertainty is more than 1.5 dB when the 9-point arrangement is small, which does not meet the requirements of the engineering method. The applicable range of 3D layout environment is better than that of 9 points layout.
【作者单位】: 上汽集团商用车技术中心;上海大众汽车有限公司;
【分类号】:TK406
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