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Acoustic wave is one of the important means to realize the fast and accurate transmission of downhole information. The drill string serving as information transmission channel has obvious periodic pipe structure characteristics. In order to study the frequency spectrum quality of drill string channel in actual working conditions, a multilevel evaluation method of acoustic frequency spectrum based on improved radar chart was provided. The influence of axial tension stress on the frequency spectrum characteristics of acoustic wave in pipe structure was studied and analyzed by the method, and the criteria for judging the frequency spectrum characteristics were established. Practice shows that, the existence of tensile stress has a significant impact on the acoustic frequency spectrum and passband characteristics. With the increase of tensile stress, the evaluation index of frequency spectrum characteristic increases first and then decreases, and there exists a peak point with the best frequency spectrum characteristic. This method can comprehensively reflect the influence of different factors on the frequency spectrum characteristics of acoustic wave in drill string channel, and comprehensively evaluate the distortion degree of frequency spectrum characteristics from the multiple perspectives. It provides a basis for optimizing carrier frequency and designing the installation position of repeater when dealing with multi-factors interference in the field application of downhole information acoustic transmission technology.
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声波是实现井下信息快速准确传输的重要手段之一,钻杆等周期性管结构的声波频率响应表现出通带与阻带交替出现的梳状滤波特征。为分析实际工况中钻柱信道频谱质量,提出了基于改进雷达图法的声波频谱多级评价方法,利用该方法分析研究了轴向拉应力对管结构中声波频谱特性的影响,并建立了判别标准。实践表明:拉应力的存在对声波频谱及频谱中通带特性影响显著,随拉应力增加,频谱特性评价指标先增后减,存在频谱特性最优的峰值点。该方法能够较为全面地反映不同影响因素对钻柱信道中声波频谱特性的影响,从多角度对频谱特性的畸变程度进行了全面评价,对井下信息声传输技术现场应用过程中应对多因素干扰时的载波频率优选及中继器安装位置设计提供依据。
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1 State Key Laboratory of Oil and Gas Equipment, CNPC Tubular Goods Research Institute, Xi'an 710077, China
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1 中国石油集团工程材料研究院有限公司油气钻采输送装备全国重点实验室, 西安 710077
2 中国石油大学(华东)机电工程学院, 青岛 266580, bio={"content":"
闫炎(1993—),男,汉族,辽宁盘锦人,博士后,高级工程师。研究方向:井下系统、信息与控制工程。E-mail:yanyan3@cnpc.com.cn。
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闫炎(1993—),男,汉族,辽宁盘锦人,博士后,高级工程师。研究方向:井下系统、信息与控制工程。E-mail:yanyan3@cnpc.com.cn。
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2 College of Mechanical and Electrical Engineering, China University of Petroleum (East China), Qingdao 266580, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1204841082044523164, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, authorId=1204841081855779479, language=CN, stringName=刘永红, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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中国石油大学学报(自然科学版),
2015,
39(2): 58-62., articleTitle=周期性螺纹连接管结构中声波的频谱特性测试, refAbstract=null), Reference(id=1204841091611730729, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, doi=null, pmid=null, pmcid=null, year=2015, volume=39, issue=2, pageStart=58, pageEnd=62, url=null, language=null, rfNumber=[19], rfOrder=35, authorNames=Liu Yongwang, Guan Zhichuan, Du Zhenchuan, journalName=Journal of China University of Petroleum(Natural Science Edition), refType=null, unstructuredReference=
Liu Yongwang,
Guan Zhichuan,
Du Zhenchuan, et al. Spectrum characteristics testing of acoustic propagation in drill-string with periodic thread connections[J].
Journal of China University of Petroleum(Natural Science Edition),
2015,
39(2): 58-62., articleTitle=Spectrum characteristics testing of acoustic propagation in drill-string with periodic thread connections, refAbstract=null)], funds=[Fund(id=1204841087299986157, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, awardId=2023YFB3711700, language=CN, fundingSource=国家重点研发计划(2023YFB3711700), fundOrder=null, country=null), Fund(id=1204841087392260847, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, awardId=2024JC-YBQN-0522, language=CN, fundingSource=陕西省自然科学基础研究计划青年项目(2024JC-YBQN-0522), fundOrder=null, country=null), Fund(id=1204841087476146929, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, awardId=YSK2023004, language=CN, fundingSource=页岩气评价与开采四川省重点实验室资助项目(YSK2023004), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1204841081008530030, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, xref=1, ext=[AuthorCompanyExt(id=1204841081016918641, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, companyId=1204841081008530030, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 State Key Laboratory of Oil and Gas Equipment, CNPC Tubular Goods Research Institute, Xi'an 710077, China), AuthorCompanyExt(id=1204841081025307249, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, companyId=1204841081008530030, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 中国石油集团工程材料研究院有限公司油气钻采输送装备全国重点实验室, 西安 710077)]), AuthorCompany(id=1204841081100804724, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, xref=2, ext=[AuthorCompanyExt(id=1204841081109193333, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, companyId=1204841081100804724, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 College of Mechanical and Electrical Engineering, China University of Petroleum (East China), Qingdao 266580, China), AuthorCompanyExt(id=1204841081113387638, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, companyId=1204841081100804724, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 中国石油大学(华东)机电工程学院, 青岛 266580)]), AuthorCompany(id=1204841081184690808, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, xref=3, ext=[AuthorCompanyExt(id=1204841081193079417, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, companyId=1204841081184690808, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China), AuthorCompanyExt(id=1204841081201468026, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, companyId=1204841081184690808, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 中国石油大学(华东)石油工程学院, 青岛 266580)]), AuthorCompany(id=1204841081264382588, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, xref=4, ext=[AuthorCompanyExt(id=1204841081268576893, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, companyId=1204841081264382588, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4 CNPC Engineering Technology R&D Co., Beijing 102206, China), AuthorCompanyExt(id=1204841081276965503, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, companyId=1204841081264382588, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
4 中国石油集团工程技术研究院有限公司, 北京 102206)])], figs=[ArticleFig(id=1204841084884067013, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Fig.1, caption=
Sketch map of periodic drill-string, figureFileSmall=OsULtoLs70+Fn7zLjI4qrg==, figureFileBig=Xgwfk4LZi4/qGpRTwXieCw==, tableContent=null), ArticleFig(id=1204841084959564487, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=图1, caption=
周期性钻柱示意图 u、v为声波传入、传出的位移;d为结构周期长度;a为截面积;ρ为密度;c为声速;下标1和2分别表示钻杆和接箍
, figureFileSmall=OsULtoLs70+Fn7zLjI4qrg==, figureFileBig=Xgwfk4LZi4/qGpRTwXieCw==, tableContent=null), ArticleFig(id=1204841085110559433, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Fig.2, caption=
Frequency-transmission coefficient relationship curve, figureFileSmall=Syzt67znEfetxWCILsMWYQ==, figureFileBig=/uLrO0wpiN8Wnj+NzJJ6bQ==, tableContent=null), ArticleFig(id=1204841085198639819, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=图2, caption=
频率-透射系数曲线, figureFileSmall=Syzt67znEfetxWCILsMWYQ==, figureFileBig=/uLrO0wpiN8Wnj+NzJJ6bQ==, tableContent=null), ArticleFig(id=1204841085253165773, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Fig.3, caption=
Principle diagram of NC-OFDM, figureFileSmall=7fv1sxqru5BZZQKVD7gfeA==, figureFileBig=wGRTZLIJk/mU0eN13KXhAw==, tableContent=null), ArticleFig(id=1204841085320274638, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=图3, caption=
非连续正交频分复用技术原理图 N为个数
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Sketch map of selection of spectrum passband evaluation index, figureFileSmall=trydozOY8wh1XqQnmyb7iw==, figureFileBig=NWlLB4i0S0i2a37JwvG8+A==, tableContent=null), ArticleFig(id=1204841085496435408, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=图4, caption=
频谱通带评价指标选取示意图, figureFileSmall=trydozOY8wh1XqQnmyb7iw==, figureFileBig=NWlLB4i0S0i2a37JwvG8+A==, tableContent=null), ArticleFig(id=1204841085571932881, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Fig.5, caption=
Flow chart of evaluation method, figureFileSmall=A3nhxuX+2RJ84Yf+ignyQw==, figureFileBig=b/MF+QrzhnDIJdjUsKDtMw==, tableContent=null), ArticleFig(id=1204841085647430354, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=图5, caption=
评价方法流程图, figureFileSmall=A3nhxuX+2RJ84Yf+ignyQw==, figureFileBig=b/MF+QrzhnDIJdjUsKDtMw==, tableContent=null), ArticleFig(id=1204841085743899348, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Fig.6, caption=
Spectrum comparison of acoustic waves in drill strings with the minimum and maximum axial tension stresses, figureFileSmall=gcfw47okMe6+22J26u6AoQ==, figureFileBig=0+QK/NvdpmnGp0bkZCZz3A==, tableContent=null), ArticleFig(id=1204841085831979733, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=图6, caption=
不同拉应力钻柱中声波频谱对比图, figureFileSmall=gcfw47okMe6+22J26u6AoQ==, figureFileBig=0+QK/NvdpmnGp0bkZCZz3A==, tableContent=null), ArticleFig(id=1204841085911671511, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Fig.7, caption=
Multilevel evaluation radar chart, figureFileSmall=NPmTPBjtHz6D8fY95/eXPw==, figureFileBig=XvAWXCP64NC6gu35xtNqYg==, tableContent=null), ArticleFig(id=1204841086008140504, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=图7, caption=
多级评价雷达图, figureFileSmall=NPmTPBjtHz6D8fY95/eXPw==, figureFileBig=XvAWXCP64NC6gu35xtNqYg==, tableContent=null), ArticleFig(id=1204841086075249370, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Table 1, caption=
Periodic pipeline parameters
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| 参数 | d/m | ρ/(kg·m-3) | c/(m·s-1) | a/cm2 |
| 管体 | 9.14 | 7 870 | 5 050 | 24.52 |
| 接箍 | 0.46 | 7 870 | 5 050 | 130.0 |
), ArticleFig(id=1204841086163329756, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=表1, caption=
周期性钻柱结构参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | d/m | ρ/(kg·m-3) | c/(m·s-1) | a/cm2 |
| 管体 | 9.14 | 7 870 | 5 050 | 24.52 |
| 接箍 | 0.46 | 7 870 | 5 050 | 130.0 |
), ArticleFig(id=1204841086255604446, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Table 1, caption=
Multilevel evaluation indicator for spectrum characteristic evaluation
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| 一级指标 | 二级指标 | 三级指标 |
| 频谱特性 K | 第1通带特性K1 | 通带下限频率 |
| 通带上限频率 |
| 通带宽度 |
| 通带内峰值 |
| 通带内峰值对应频率 |
| 通带能量 |
| ︙ | ︙ |
| 第i通带特性Ki | 通带下限频率 |
| 通带上限频率 |
| 通带宽度 |
| 通带内峰值 |
| 通带内峰值对应频率 |
| 通带能量 |
), ArticleFig(id=1204841086331101919, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=表1, caption=
频谱特性评价多级评价指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| 一级指标 | 二级指标 | 三级指标 |
| 频谱特性 K | 第1通带特性K1 | 通带下限频率 |
| 通带上限频率 |
| 通带宽度 |
| 通带内峰值 |
| 通带内峰值对应频率 |
| 通带能量 |
| ︙ | ︙ |
| 第i通带特性Ki | 通带下限频率 |
| 通带上限频率 |
| 通带宽度 |
| 通带内峰值 |
| 通带内峰值对应频率 |
| 通带能量 |
), ArticleFig(id=1204841086427570913, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Table 2, caption=
Standardized data of passband evaluation indicators
, figureFileSmall=null, figureFileBig=null, tableContent=
| 三级指标 | 权重 | 0 MPa | 17 MPa | 33 MPa | 50 MPa | 67 MPa | 84 MPa | 100 MPa | 117 MPa | 134 MPa | 150 MPa | 167 MPa |
| 通带1 | | 1/6 | 1 | 0.996 0 | 1.385 0 | 1.354 0 | 1.150 0 | 1.192 0 | 1.181 0 | 1.172 0 | 1.150 0 | 1.158 0 | 1.088 0 |
| | 1/6 | 1 | 0.966 0 | 0.930 0 | 0.969 0 | 0.962 0 | 0.974 0 | 0.989 0 | 0.989 0 | 0.987 0 | 0.987 0 | 1.004 0 |
| | 1/6 | 1 | 0.948 0 | 1.077 0 | 0.119 0 | 1.014 0 | 1.050 0 | 1.067 0 | 1.063 0 | 1.050 0 | 1.055 0 | 1.046 0 |
| | 1/6 | 1 | 0.924 8 | 0.912 6 | 0.906 1 | 0.764 7 | 0.550 0 | 0.654 6 | 0.570 2 | 0.558 1 | 0.499 0 | 0.538 9 |
| | 1/6 | 1 | 0.901 9 | 0.941 7 | 0.951 5 | 0.932 0 | 0.922 3 | 0.825 2 | 0.826 2 | 0.872 8 | 0.523 3 | 0.215 6 |
| | 1/6 | 1 | 0.594 2 | 0.543 5 | 0.512 5 | 0.468 0 | 0.490 7 | 0.507 9 | 0.503 3 | 0.467 7 | 0.435 9 | 0.404 0 |
| 通带2 | | 1/6 | 1 | 1.090 0 | 1.112 0 | 1.090 0 | 1.097 0 | 1.094 0 | 1.071 0 | 0.960 0 | 0.940 0 | 0.962 0 | 0.962 0 |
| | 1/6 | 1 | 0.962 0 | 0.955 0 | 0.959 0 | 1.043 0 | 0.959 0 | 1.019 0 | 1.024 0 | 1.006 0 | 1.022 0 | 1.113 0 |
| | 1/6 | 1 | 1.036 0 | 1.050 0 | 1.031 0 | 1.243 0 | 1.033 0 | 1.148 0 | 0.999 0 | 0.928 0 | 0.999 0 | 1.221 0 |
| | 1/6 | 1 | 0.858 5 | 0.294 9 | 0.233 8 | 0.590 5 | 0.530 9 | 0.426 7 | 0.345 0 | 0.124 0 | 0.313 0 | 0.277 0 |
| | 1/6 | 1 | 0.924 7 | 0.908 1 | 0.803 3 | 0.958 6 | 0.891 2 | 0.897 9 | 0.891 2 | 0.887 8 | 0.884 0 | 0.881 0 |
| | 1/6 | 1 | 1.668 9 | 1.894 7 | 2.092 9 | 2.357 9 | 2.228 3 | 2.363 3 | 2.359 5 | 2.295 6 | 2.272 4 | 2.337 7 |
| 通带3 | | 1/6 | 1 | 1.102 9 | 1.103 5 | 1.073 1 | 1.043 5 | 1.130 2 | 1.066 7 | 1.072 3 | 1.059 8 | 1.063 3 | 0.958 3 |
| | 1/6 | 1 | 1.110 0 | 1.160 0 | 1.170 0 | 1.150 0 | 1.150 0 | 1.160 0 | 1.150 0 | 1.160 0 | 1.170 0 | 1.180 0 |
| | 1/6 | 1 | 2.194 0 | 2.483 0 | 2.425 0 | 2.122 0 | 2.58 | 2.330 0 | 2.284 0 | 2.265 0 | 2.342 0 | 1.871 0 |
| | 1/6 | 1 | 0.650 0 | 0.122 0 | 0.226 0 | 0.816 6 | 0.938 5 | 0.843 8 | 0.949 1 | 0.942 0 | 0.808 3 | 0.802 4 |
| | 1/6 | 1 | 0.942 0 | 0.932 1 | 0.882 3 | 0.872 5 | 0.882 3 | 0.954 2 | 0.916 1 | 0.906 0 | 0.902 2 | 0.874 3 |
| | 1/6 | 1 | 3.961 7 | 4.694 9 | 3.379 0 | 2.362 2 | 2.227 2 | 1.931 7 | 2.089 1 | 1.833 9 | 1.622 2 | 1.348 2 |
), ArticleFig(id=1204841086565982947, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=表2, caption=
不同拉应力下钻柱中声波频谱三级评价指标标准化数据
, figureFileSmall=null, figureFileBig=null, tableContent=
| 三级指标 | 权重 | 0 MPa | 17 MPa | 33 MPa | 50 MPa | 67 MPa | 84 MPa | 100 MPa | 117 MPa | 134 MPa | 150 MPa | 167 MPa |
| 通带1 | | 1/6 | 1 | 0.996 0 | 1.385 0 | 1.354 0 | 1.150 0 | 1.192 0 | 1.181 0 | 1.172 0 | 1.150 0 | 1.158 0 | 1.088 0 |
| | 1/6 | 1 | 0.966 0 | 0.930 0 | 0.969 0 | 0.962 0 | 0.974 0 | 0.989 0 | 0.989 0 | 0.987 0 | 0.987 0 | 1.004 0 |
| | 1/6 | 1 | 0.948 0 | 1.077 0 | 0.119 0 | 1.014 0 | 1.050 0 | 1.067 0 | 1.063 0 | 1.050 0 | 1.055 0 | 1.046 0 |
| | 1/6 | 1 | 0.924 8 | 0.912 6 | 0.906 1 | 0.764 7 | 0.550 0 | 0.654 6 | 0.570 2 | 0.558 1 | 0.499 0 | 0.538 9 |
| | 1/6 | 1 | 0.901 9 | 0.941 7 | 0.951 5 | 0.932 0 | 0.922 3 | 0.825 2 | 0.826 2 | 0.872 8 | 0.523 3 | 0.215 6 |
| | 1/6 | 1 | 0.594 2 | 0.543 5 | 0.512 5 | 0.468 0 | 0.490 7 | 0.507 9 | 0.503 3 | 0.467 7 | 0.435 9 | 0.404 0 |
| 通带2 | | 1/6 | 1 | 1.090 0 | 1.112 0 | 1.090 0 | 1.097 0 | 1.094 0 | 1.071 0 | 0.960 0 | 0.940 0 | 0.962 0 | 0.962 0 |
| | 1/6 | 1 | 0.962 0 | 0.955 0 | 0.959 0 | 1.043 0 | 0.959 0 | 1.019 0 | 1.024 0 | 1.006 0 | 1.022 0 | 1.113 0 |
| | 1/6 | 1 | 1.036 0 | 1.050 0 | 1.031 0 | 1.243 0 | 1.033 0 | 1.148 0 | 0.999 0 | 0.928 0 | 0.999 0 | 1.221 0 |
| | 1/6 | 1 | 0.858 5 | 0.294 9 | 0.233 8 | 0.590 5 | 0.530 9 | 0.426 7 | 0.345 0 | 0.124 0 | 0.313 0 | 0.277 0 |
| | 1/6 | 1 | 0.924 7 | 0.908 1 | 0.803 3 | 0.958 6 | 0.891 2 | 0.897 9 | 0.891 2 | 0.887 8 | 0.884 0 | 0.881 0 |
| | 1/6 | 1 | 1.668 9 | 1.894 7 | 2.092 9 | 2.357 9 | 2.228 3 | 2.363 3 | 2.359 5 | 2.295 6 | 2.272 4 | 2.337 7 |
| 通带3 | | 1/6 | 1 | 1.102 9 | 1.103 5 | 1.073 1 | 1.043 5 | 1.130 2 | 1.066 7 | 1.072 3 | 1.059 8 | 1.063 3 | 0.958 3 |
| | 1/6 | 1 | 1.110 0 | 1.160 0 | 1.170 0 | 1.150 0 | 1.150 0 | 1.160 0 | 1.150 0 | 1.160 0 | 1.170 0 | 1.180 0 |
| | 1/6 | 1 | 2.194 0 | 2.483 0 | 2.425 0 | 2.122 0 | 2.58 | 2.330 0 | 2.284 0 | 2.265 0 | 2.342 0 | 1.871 0 |
| | 1/6 | 1 | 0.650 0 | 0.122 0 | 0.226 0 | 0.816 6 | 0.938 5 | 0.843 8 | 0.949 1 | 0.942 0 | 0.808 3 | 0.802 4 |
| | 1/6 | 1 | 0.942 0 | 0.932 1 | 0.882 3 | 0.872 5 | 0.882 3 | 0.954 2 | 0.916 1 | 0.906 0 | 0.902 2 | 0.874 3 |
| | 1/6 | 1 | 3.961 7 | 4.694 9 | 3.379 0 | 2.362 2 | 2.227 2 | 1.931 7 | 2.089 1 | 1.833 9 | 1.622 2 | 1.348 2 |
), ArticleFig(id=1204841086666646245, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Table 3, caption=
Standardized data of spectrum evaluation indicators
, figureFileSmall=null, figureFileBig=null, tableContent=
二级 指标 | 权重 | 0 MPa | 17 MPa | 33 MPa | 50 MPa | 67 MPa | 84 MPa | 100 MPa | 117 MPa | 134 MPa | 150 MPa | 167 MPa |
| | 0.595 6 | 1 | 0.893 6 | 0.980 6 | 0.845 9 | 0.894 9 | 0.881 7 | 0.886 1 | 0.871 3 | 0.865 7 | 0.803 1 | 0.754 2 |
| | 0.272 2 | 1 | 1.106 3 | 1.085 1 | 1.101 7 | 1.272 7 | 1.179 9 | 1.223 1 | 1.173 0 | 1.118 0 | 1.148 0 | 1.208 0 |
| | 0.132 2 | 1 | 1.827 3 | 2.004 5 | 1.682 5 | 1.457 5 | 1.554 1 | 1.433 1 | 1.462 3 | 1.406 5 | 1.367 7 | 1.199 5 |
), ArticleFig(id=1204841086746338023, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=表3, caption=
不同拉应力下钻柱中声波频谱二级评价指标标准化数据
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二级 指标 | 权重 | 0 MPa | 17 MPa | 33 MPa | 50 MPa | 67 MPa | 84 MPa | 100 MPa | 117 MPa | 134 MPa | 150 MPa | 167 MPa |
| | 0.595 6 | 1 | 0.893 6 | 0.980 6 | 0.845 9 | 0.894 9 | 0.881 7 | 0.886 1 | 0.871 3 | 0.865 7 | 0.803 1 | 0.754 2 |
| | 0.272 2 | 1 | 1.106 3 | 1.085 1 | 1.101 7 | 1.272 7 | 1.179 9 | 1.223 1 | 1.173 0 | 1.118 0 | 1.148 0 | 1.208 0 |
| | 0.132 2 | 1 | 1.827 3 | 2.004 5 | 1.682 5 | 1.457 5 | 1.554 1 | 1.433 1 | 1.462 3 | 1.406 5 | 1.367 7 | 1.199 5 |
), ArticleFig(id=1204841086842807017, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Table 4, caption=
Comprehensive evaluation data of acoustic spectrum
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应力/ MPa | 面积评价值 | 周长评价值 | 综合评价值 | |
| 通带1 | 通带2 | 通带3 | 频谱 | 通带1 | 通带2 | 通带3 | 频谱 | 通带1 | 通带2 | 通带3 | 频谱 |
| 0 | 0.984 2 | 0.562 7 | 0.177 4 | 0.698 6 | 1.000 0 | 1.000 0 | 1.000 0 | 1.000 0 | 0.992 1 | 0.750 1 | 0.421 2 | 0.835 9 |
| 17 | 0.794 8 | 0.709 3 | 0.717 5 | 0.875 4 | 0.988 7 | 0.970 8 | 0.825 4 | 0.961 2 | 0.886 5 | 0.829 8 | 0.769 6 | 0.917 3 |
| 33 | 1.000 0 | 0.727 0 | 1.000 0 | 1.000 0 | 0.968 4 | 0.911 2 | 0.761 5 | 0.958 6 | 0.972 8 | 0.813 9 | 0.844 3 | 0.978 0 |
| 50 | 0.783 3 | 0.773 7 | 0.610 5 | 0.791 7 | 0.899 0 | 0.882 6 | 0.822 5 | 0.964 8 | 0.839 2 | 0.826 4 | 0.708 6 | 0.874 0 |
| 67 | 0.811 7 | 1.000 0 | 0.411 6 | 0.838 5 | 0.971 0 | 0.911 4 | 0.915 4 | 0.979 1 | 0.887 8 | 0.954 7 | 0.613 9 | 0.906 2 |
| 84 | 0.798 2 | 0.865 1 | 0.469 4 | 0.812 6 | 0.958 5 | 0.905 5 | 0.912 7 | 0.975 9 | 0.874 7 | 0.885 0 | 0.654 5 | 0.890 5 |
| 100 | 0.8003 | 0.945 0 | 0.392 2 | 0.801 9 | 0.965 7 | 0.890 7 | 0.928 7 | 0.980 7 | 0.879 1 | 0.917 4 | 0.603 6 | 0.886 9 |
| 117 | 0.777 9 | 0.886 1 | 0.407 8 | 0.776 2 | 0.960 5 | 0.873 7 | 0.930 0 | 0.979 3 | 0.864 4 | 0.879 9 | 0.615 9 | 0.871 9 |
| 134 | 0.769 5 | 0.828 1 | 0.374 6 | 0.733 2 | 0.958 6 | 0.849 2 | 0.936 6 | 0.982 4 | 0.858 8 | 0.838 6 | 0.592 3 | 0.848 8 |
| 150 | 0.679 2 | 0.845 0 | 0.357 3 | 0.692 7 | 0.934 5 | 0.877 5 | 0.928 7 | 0.976 3 | 0.796 7 | 0.861 1 | 0.576 0 | 0.822 5 |
| 167 | 0.621 0 | 0.935 2 | 0.267 2 | 0.647 8 | 0.901 5 | 0.878 0 | 0.955 2 | 0.973 1 | 0.748 2 | 0.906 2 | 0.505 2 | 0.794 0 |
), ArticleFig(id=1204841086926693098, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=表4, caption=
不同拉应力下钻柱中声波频谱综合评价数据
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应力/ MPa | 面积评价值 | 周长评价值 | 综合评价值 | |
| 通带1 | 通带2 | 通带3 | 频谱 | 通带1 | 通带2 | 通带3 | 频谱 | 通带1 | 通带2 | 通带3 | 频谱 |
| 0 | 0.984 2 | 0.562 7 | 0.177 4 | 0.698 6 | 1.000 0 | 1.000 0 | 1.000 0 | 1.000 0 | 0.992 1 | 0.750 1 | 0.421 2 | 0.835 9 |
| 17 | 0.794 8 | 0.709 3 | 0.717 5 | 0.875 4 | 0.988 7 | 0.970 8 | 0.825 4 | 0.961 2 | 0.886 5 | 0.829 8 | 0.769 6 | 0.917 3 |
| 33 | 1.000 0 | 0.727 0 | 1.000 0 | 1.000 0 | 0.968 4 | 0.911 2 | 0.761 5 | 0.958 6 | 0.972 8 | 0.813 9 | 0.844 3 | 0.978 0 |
| 50 | 0.783 3 | 0.773 7 | 0.610 5 | 0.791 7 | 0.899 0 | 0.882 6 | 0.822 5 | 0.964 8 | 0.839 2 | 0.826 4 | 0.708 6 | 0.874 0 |
| 67 | 0.811 7 | 1.000 0 | 0.411 6 | 0.838 5 | 0.971 0 | 0.911 4 | 0.915 4 | 0.979 1 | 0.887 8 | 0.954 7 | 0.613 9 | 0.906 2 |
| 84 | 0.798 2 | 0.865 1 | 0.469 4 | 0.812 6 | 0.958 5 | 0.905 5 | 0.912 7 | 0.975 9 | 0.874 7 | 0.885 0 | 0.654 5 | 0.890 5 |
| 100 | 0.8003 | 0.945 0 | 0.392 2 | 0.801 9 | 0.965 7 | 0.890 7 | 0.928 7 | 0.980 7 | 0.879 1 | 0.917 4 | 0.603 6 | 0.886 9 |
| 117 | 0.777 9 | 0.886 1 | 0.407 8 | 0.776 2 | 0.960 5 | 0.873 7 | 0.930 0 | 0.979 3 | 0.864 4 | 0.879 9 | 0.615 9 | 0.871 9 |
| 134 | 0.769 5 | 0.828 1 | 0.374 6 | 0.733 2 | 0.958 6 | 0.849 2 | 0.936 6 | 0.982 4 | 0.858 8 | 0.838 6 | 0.592 3 | 0.848 8 |
| 150 | 0.679 2 | 0.845 0 | 0.357 3 | 0.692 7 | 0.934 5 | 0.877 5 | 0.928 7 | 0.976 3 | 0.796 7 | 0.861 1 | 0.576 0 | 0.822 5 |
| 167 | 0.621 0 | 0.935 2 | 0.267 2 | 0.647 8 | 0.901 5 | 0.878 0 | 0.955 2 | 0.973 1 | 0.748 2 | 0.906 2 | 0.505 2 | 0.794 0 |
), ArticleFig(id=1204841087010579178, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=EN, label=Table 5, caption=
Comprehensive evaluation results of acoustic spectrum under different stresses
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| 等级 | 评价函数值波动范围 |
| 优 | Δf≥+4%f0 |
| 良 | +2%f0≤Δf<+4%f0 |
| 中 | 0≤Δf<+2%f0 |
| 合格 | -2%f0≤Δf<0 |
| 不合格 | -4%f0≤Δf<-2%f0 |
| 差 | Δf<-4%f0 |
), ArticleFig(id=1204841087090270955, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1203753461406998588, language=CN, label=表5, caption=
不同拉应力下钻柱中声波频谱综合评价结果
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| 等级 | 评价函数值波动范围 |
| 优 | Δf≥+4%f0 |
| 良 | +2%f0≤Δf<+4%f0 |
| 中 | 0≤Δf<+2%f0 |
| 合格 | -2%f0≤Δf<0 |
| 不合格 | -4%f0≤Δf<-2%f0 |
| 差 | Δf<-4%f0 |
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