Article(id=1223202685051064666, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20230353, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1678377600000, receivedDateStr=2023-03-10, revisedDate=1681142400000, revisedDateStr=2023-04-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1769563846123, onlineDateStr=2026-01-28, pubDate=1703433600000, pubDateStr=2023-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769563846123, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769563846123, creator=13701087609, updateTime=1769563846123, updator=13701087609, issue=Issue{id=1223202678788965355, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='12', pageStart='1', pageEnd='228', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769563844630, creator=13701087609, updateTime=1769563913308, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223202966899901286, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223202966899901287, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=137, endPage=141, ext={EN=ArticleExt(id=1223202686225469873, articleId=1223202685051064666, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Simulation and Experimental Study of Temperature Stress of Aqueduct Wall Plate, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

Based on the temperature load on the wall slab of a large aqueduct when the temperature suddenly drops, the temperature self-confinement stress of the upper surface of the concrete slab was tested and analyzed. The temperature difference between upper and lower surfaces of concrete slabs at different cooling rates and the self-constrained principal stress of concrete slab surface temperature at 1 h at a cooling rate of 10 ℃/h were measured. The accuracy of finite element modeling was verified by comparing the numerical value of concrete transient temperature stress simulated by finite element method with the experimental test data. On this basis, the influence of cooling rate on transient temperature and stress field of aqueduct was analyzed. The impact of different insulation materials on surface temperature and stress field of aqueduct was discussed. The results show that the temperature tensile stress on the aqueduct surface will increase at a faster rate with the increase of the ambient temperature decreasing rate. Compared with the external surface temperature stress of the aqueduct without insulation measures, the tensile stress of the external surface temperature of the U-shaped aqueduct was reduced by 83%, 80% and 68%, respectively, when the polyurethane, polystyrene board and vitrified microbeads with 2mm thickness were adopted. Considering the cost and construction technology, vitrified microbead insulation materials are more suitable as thermal insulation materials on the outer surface of aqueducts.

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以大型渡槽壁板偶遇气温骤然下降时所受温度载荷为基础,开展了混凝土板上表面急剧降温时温度自约束应力测试分析,测定了在不同降温速率时混凝土板上下表面温度差及降温速率为10 ℃/h时在1 h时刻的混凝土板表面温度自约束主应力,通过对比有限元仿真混凝土瞬态温度应力数值与试验测试数据,验证了有限元建模的准确性。在此基础上,分析了降温速率对渡槽瞬态温度场和应力场的影响,探讨了不同保温材料对渡槽表面温度与应力场的影响。结果表明,随着环境气温下降速率的增大,渡槽表面的温度拉应力将以更快的速度增加;当U型渡槽采用2 mm厚度聚氨酯、聚苯乙烯板和玻化微珠保温材料后,与无保温措施渡槽外表面温度应力相比,渡槽外表面温度拉应力分别减少83%、80%、68%。综合考虑成本与施工技术,玻化微珠保温材料较适合作为渡槽外表面的保温隔热材料。

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李彬(1988-),男,博士、副教授、硕导,研究方向为热应力数值模拟及结构设计理论等,E-mail:

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李彬(1988-),男,博士、副教授、硕导,研究方向为热应力数值模拟及结构设计理论等,E-mail:

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渡槽壁板温度应力的仿真与试验研究
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李彬 1 , 张沛琳 1 , 汪泓吉 2 , 何齐宇 1
水电能源科学 | 水利水电工程 2023,41(12): 137-141
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水电能源科学 | 水利水电工程 2023, 41(12): 137-141
渡槽壁板温度应力的仿真与试验研究
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李彬1 , 张沛琳1, 汪泓吉2, 何齐宇1
作者信息
  • 1.武汉轻工大学机械工程学院,湖北 武汉 430023
  • 2.中南安全环境技术研究院股份有限公司,湖北 武汉 430051
  • 李彬(1988-),男,博士、副教授、硕导,研究方向为热应力数值模拟及结构设计理论等,E-mail:

Simulation and Experimental Study of Temperature Stress of Aqueduct Wall Plate
Bin LI1 , Pei-lin ZHANG1, Hong-ji WANG2, Qi-yu HE1
Affiliations
  • 1.School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430023, China
  • 2.Central-southern Safety and Environment Technology Institute Co., LTD., Wuhan 430051, China
出版时间: 2023-12-25 doi: 10.20040/j.cnki.1000-7709.2023.20230353
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以大型渡槽壁板偶遇气温骤然下降时所受温度载荷为基础,开展了混凝土板上表面急剧降温时温度自约束应力测试分析,测定了在不同降温速率时混凝土板上下表面温度差及降温速率为10 ℃/h时在1 h时刻的混凝土板表面温度自约束主应力,通过对比有限元仿真混凝土瞬态温度应力数值与试验测试数据,验证了有限元建模的准确性。在此基础上,分析了降温速率对渡槽瞬态温度场和应力场的影响,探讨了不同保温材料对渡槽表面温度与应力场的影响。结果表明,随着环境气温下降速率的增大,渡槽表面的温度拉应力将以更快的速度增加;当U型渡槽采用2 mm厚度聚氨酯、聚苯乙烯板和玻化微珠保温材料后,与无保温措施渡槽外表面温度应力相比,渡槽外表面温度拉应力分别减少83%、80%、68%。综合考虑成本与施工技术,玻化微珠保温材料较适合作为渡槽外表面的保温隔热材料。

渡槽  /  混凝土  /  自约束应力  /  降温速率  /  数值模拟

Based on the temperature load on the wall slab of a large aqueduct when the temperature suddenly drops, the temperature self-confinement stress of the upper surface of the concrete slab was tested and analyzed. The temperature difference between upper and lower surfaces of concrete slabs at different cooling rates and the self-constrained principal stress of concrete slab surface temperature at 1 h at a cooling rate of 10 ℃/h were measured. The accuracy of finite element modeling was verified by comparing the numerical value of concrete transient temperature stress simulated by finite element method with the experimental test data. On this basis, the influence of cooling rate on transient temperature and stress field of aqueduct was analyzed. The impact of different insulation materials on surface temperature and stress field of aqueduct was discussed. The results show that the temperature tensile stress on the aqueduct surface will increase at a faster rate with the increase of the ambient temperature decreasing rate. Compared with the external surface temperature stress of the aqueduct without insulation measures, the tensile stress of the external surface temperature of the U-shaped aqueduct was reduced by 83%, 80% and 68%, respectively, when the polyurethane, polystyrene board and vitrified microbeads with 2mm thickness were adopted. Considering the cost and construction technology, vitrified microbead insulation materials are more suitable as thermal insulation materials on the outer surface of aqueducts.

aqueduct  /  concrete  /  self-confining stress  /  cooling rate  /  numerical simulation
李彬, 张沛琳, 汪泓吉, 何齐宇. 渡槽壁板温度应力的仿真与试验研究. 水电能源科学, 2023 , 41 (12) : 137 -141 . DOI: 10.20040/j.cnki.1000-7709.2023.20230353
Bin LI, Pei-lin ZHANG, Hong-ji WANG, Qi-yu HE. Simulation and Experimental Study of Temperature Stress of Aqueduct Wall Plate[J]. Water Resources and Power, 2023 , 41 (12) : 137 -141 . DOI: 10.20040/j.cnki.1000-7709.2023.20230353
  • 湖北省自然科学基金青年项目(2021CFB292)
  • 海防技术创新中心创新基金项目(JJ-2020-719-01)
  • 武汉轻工大学校立科研杰出青年项目(2022J04)
  • 武汉市知识创新专项(2022010801020393)
2023年第41卷第12期
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doi: 10.20040/j.cnki.1000-7709.2023.20230353
  • 接收时间:2023-03-10
  • 首发时间:2026-01-28
  • 出版时间:2023-12-25
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  • 收稿日期:2023-03-10
  • 修回日期:2023-04-11
基金
湖北省自然科学基金青年项目(2021CFB292)
海防技术创新中心创新基金项目(JJ-2020-719-01)
武汉轻工大学校立科研杰出青年项目(2022J04)
武汉市知识创新专项(2022010801020393)
作者信息
    1.武汉轻工大学机械工程学院,湖北 武汉 430023
    2.中南安全环境技术研究院股份有限公司,湖北 武汉 430051
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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