• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2025, Vol. 61 ›› Issue (19): 263-272.doi: 10.3901/JME.2025.19.263

• 数字化设计与制造 • 上一篇    

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混凝土徐变诱导下重型机床基础栓接性能研究

姜凯1, 刘志峰2,3, 陈传海2, 张涛3   

  1. 1. 重庆理工大学机械工程学院 重庆 400054;
    2. 吉林大学数控装备可靠性教育部重点实验室 长春 130025;
    3 北京工业大学机械工业重型机床数字化设计与测试重点实验室 北京 100124
  • 收稿日期:2024-10-09 修回日期:2025-04-01 发布日期:2025-11-24
  • 作者简介:姜凯,男,1991年出生,博士,讲师,硕士研究生导师。主要研究方向为界面力学、高性能装配技术以及数控机床动力学。E-mail:jiangkai@cqut.edu.cn
    刘志峰(通信作者),男,1973年出生,博士,教授,博士研究生导师。主要研究方向为数控机床可靠性理论与技术、高性能装配理论与技术以及智能制造技术。E-mail:lzfjlu@jlu.edu.cn
    陈传海,男,1983年出生,博士,教授,博士研究生导师。主要研究方向为数控机床可靠性理论与技术等。E-mail:cchchina@foxmail.com
    张涛,男,1992年出生,博士,讲师助理研究员,硕士研究生导师。主要研究方向为数控机床高性能装配、精密传动和智能制造技术。E-mail:zhangtao@bjut.edu.cn
  • 基金资助:
    国家自然科学基金青年科学基金(52505543)、重庆市自然科学基金(CSTB2024NSCQ-MSX0121)、重庆市教委科学技术研究(KJQN202401109)、重庆理工大学科研启动基金(0119230979)、吉林大学数控装备可靠性教育部重点实验室开放基金(JU-cncr-202405)和国家自然科学基金联合基金(U23B20104)资助项目。

Research on Foundation Bolting Performance of the Heavy-duty Machine Tool Induced by Concrete Creep

JIANG Kai1, LIU Zhifeng2,3, CHEN Chuanhai2, ZHANG Tao3   

  1. 1. College of Mechanical Engineering, Chongqing University of Technology, Chongqing 400054;
    2. Key Laboratory of CNC Equipment Reliability of Ministry of Education, Jilin University, Changchun 130025;
    3. Machinery Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing Technology, Beijing University of Technology, Beijing 100124
  • Received:2024-10-09 Revised:2025-04-01 Published:2025-11-24

摘要: 基础栓接性能是影响重型机床精度保持性的重要环节,混凝土基础长期受百吨级负载作用发生不均匀沉降变形,导致基础栓接性能退化。为了揭示徐变诱导下重型机床基础栓接性能退化规律,基于龄期调整的有效模量法,提出具有老化系数的混凝土徐变模型,并完成基础沉降实验验证;推导基础徐变内应力松弛方程,联合玻尔兹曼线性叠加原理和螺栓拧紧力矩方程,建立具有时变效应的螺栓连接刚度降阶模型,揭示时间、混凝土等级及加载龄期等对基础栓接性能的影响规律,阐明重型机床基础栓接性能退化行为,有效解决重型机床服役过程中基础栓接性能预测与评估的科学难题。

关键词: 重型机床, 栓接性能, 混凝土基础, 徐变

Abstract: Foundation bolting performance is an important link that affects the accuracy maintenance of the heavy-duty machine tool. Uneven settlement of the concrete foundation under hundred-ton load for a long time lead to the deterioration of foundation bolting performance. To reveal that the degradation law of foundation bolting performance of the heavy-duty machine tool induced by concrete creep, based on the effective modulus method of age adjustment, a concrete creep model with aging coefficient is proposed and verified by foundation settlement experiments. Deriving the stress relaxation equation of foundation creep, combined with Boltzmann linear superposition principle and bolt tightening torque equation, a reduced-order model of the bolted joint stiffness with time-varying effect is established, which reveals the influence law of time, concrete grade and loading age on foundation bolting performance, clarifies the degradation behavior of foundation bolting performance, and effectively solves the scientific problem of foundation bolting performance prediction and evaluation during the service of the heavy-duty machine tool.

Key words: heavy-duty machine tool, bolting performance, concrete foundation, creep

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