资源描述：
《一种路面吸声系数的现场测试方法》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、第34卷第6期声学技术Vol.34,No.62015年12月TechnicalAcousticsDec.,2015一种路面吸声系数的现场测试方法刘胜楠，蔡俊，王亚晨，于晓娟，刘玲(上海交通大学环境科学与工程学院，上海200240)摘要：为了在不破坏路面结构的条件下得到路面的吸声性能，解决工程建成后的验收和测试问题，进行了阻抗管的结构改造，并搭建了阻抗管路面测试系统；以道路路面为研究主体，研究了密封材料对测试结果的影响；运用传递函数法原理现场测试路面的吸声系数，通过比对现场实测结果与实验室路面样品测试结果，评价阻抗管现场测试系统的可靠性和测试方法的可行性。研究结果表明，用橡皮泥做密封
2、材料时，密封效果较好；路面测试系统现场实测吸声系数曲线基本一致；现场实测吸声系数与路面样品吸声系数差值不超过0.04，属于误差允许范围内，两组吸声系数在800Hz以上比较吻合，差值小于0.002，在250~630Hz范围内差值在0.02~0.038之间，且在此频率范围内路面实测吸声系数低于实验室测试结果。关键词：道路工程；现场测试方法；阻抗管；路面吸声系数；密封材料中图分类号：U416.06文献标识码：A文章编号：1000-3630(2015)-06-0535-05DOI编码：10.16300/j.cnki.1000-3630.2015.06.013Afieldtestmethod
3、ofpavementabsorptioncoefficientLIUSheng-nan,CAIJun,WANGYa-chen,YUXiao-juan,LIULing(SchoolofEnvironmentalScienceandTechnology,ShanghaiJiaotongUniversity,Shanghai200240,China)Abstract:Inordertogetthepavementsoundabsorptioncoefficientwithoutdamagingthepavementstructure,andtosolvetheproblemofaccep
4、tanceandtestafterthecompletionofsomeprojects,theimpedancetubestructureisre-molded,andtheimpedancetubetestsystemisconstructed.Inthetest,thepavementischosenastheresearchsubject,theinfluenceofsealingmaterialonthetestresultsisstudied.Thepavementsoundabsorptioncoefficientistestedaccordingtotheprinc
5、ipleofthetransferfunction.Meanwhile,thefeasibilityofthemeasurementmethodandreliabilityofthemeasurementsystemwithimpedancetubewasevaluatedbycomparingthefieldmeasurementresultswiththelabora-toryresults.Thestudyresultsshowthatthereisgoodsealingeffectwhenthesillyputtyisusedassealmaterial.Thefieldm
6、easuredsoundabsorptioncoefficientcurveslookalike.Thedifferenceoffieldmeasuredsoundabsorptioncoefficientwiththesoundabsorptioncoefficientofthesamplepavementislessthan0.04whichisintherangeofacceptableerror,andtheymatchbetteratthefrequencymorethan800Hz,wherethedifferenceislessthan0.002.Inthe250-6
7、30Hzfrequencyrange250-630Hz,thesoundabsorptioncoefficientoffieldmeasurementislowerthanthatthattestedinla-boratory,andthedifferenceisbetween0.02~0.038.Keywords:roadengineering;fieldtestmethod;impedancetube;pavementsoundabsorptioncoeffici
