高水头闸门止水材料超弹性与黏弹性本构研究  

Hyperelasticity and viscoelasticity of rubber waterstop material

作　　者：谭显文 王正中[1] 余小孔 刘计良[1] 刘铨鸿[1] 

机构地区：[1]西北农林科技大学水利水电工程研究所,陕西杨凌712100 [2]上海勘测设计研究院有限公司,上海200000 [3]伍斯特理工学院,美国马萨诸塞州伍斯特01601

出　　处：《振动与冲击》2014年第19期97-103,108,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51179164):大型水工弧门树状柱动力失稳机制及结构优化研究

摘　　要：首先针对闸门止水橡胶的超弹性能对其数值分析起决定性作用.根据止水橡胶单双轴拉伸和纯剪切实验,得到了其名义应力应变曲线;对通用的橡胶本构模型进行了系统的对比与分析,给出了在实验数据齐全和不全情况下,止水橡胶数值仿真最优本构模型;其次采用不同的橡胶黏弹性本构模型,通过对某超高坝底孔闸门止水有限元计算,得出止水应力松弛失效时间,通过与闸门实际运行资料对比,得出burgers本构模型是最合理的;改变了以往设计阶段采用标准线性固体模型来预测止水失效时间的做法。该研究为止水的生产设计提供了系统的参考,具有较高的理论意义与实用价值。Hyperelasticity of rubber waterstop material in gates plays a decisive role in numerical analysis.The mechanical behaviors of a vulcanized rubber were studied here with a uniaxial tensile test,a biaxial tensile one and pure shear one.Some nominal stress-strain curves for different strain rates were obtained.A systematic comtrast and analysis for general rubber constitutive models were performed.In the cases of complete experimental data and incomplete experimental data,the optimal constitutive models for rubber waterstop material were derived.With the finite element calculation for waterstop around the bottom outlet of a certain high dam,the different waterstop stress-relaxation times were obtained by adopting different viscoelastic constitutive models.Compared with the real situation.Burgers constitutive model was recommended to be used.The study results provided a reference for waterstop material design and fabrication.

关 键 词：闸门 止水 橡胶 黏弹性 超弹性 本构 

分 类 号：TU311[建筑科学—结构工程]