加载方式和速率对黄砂岩力学性能影响研究
Research on the Influence of Loading Methods and Rates on the Mechanical Properties of Yellow Sandstone
孙嘉彬 1秦楠 1梁忠豪 1苏传奇1
作者信息
- 1. 青岛科技大学机电工程学院 青岛 266100
- 折叠
摘要
以常温和500℃高温加热后的黄砂岩试件作为研究对象,进行不同加载方式和速率的单轴压缩实验,探究两种不同强度等级试件的抗压强度变化规律.建立预测黄砂岩的单轴抗压强度值的BP神经网络模型.结果表明:黄砂岩单轴抗压强度随加载速率增加呈先增大后减小在增大趋势;利用BP神经网络模型预测砂岩的单轴抗压强度与试验值有较高的相似性,相对误差最大为0.011,证明了模型的可行性.
Abstract
The uniaxial compression experiments of different loading modes and rates are carried out to study the variation of compressive strength of two different strength grades of samples.BP neural network model is established to predict the uniaxial com-pressive strength of the yellow sandstone.The results show that the uniaxial compressive strength of sandstone increases first and then decreases with the increase of loading rate.The BP neural network model is used to predict the uniaxial compressive strength of sandstone has a high similarity with the experimental value,and the maximum relative error is 0.011,which proves the feasibility of the model.
关键词
黄砂岩/加载方式/加载速率/单轴抗压强度/BP神经网络Key words
yellow sandstone/loading mode/loading rate/uniaxial compressive strength/BP neural network引用本文复制引用
基金项目
国家自然科学基金项目(51674149)
山东省自然科学基金项目(ZR2018PEE005)
矿山灾害预防控制教育部重点实验室开放研究基金项目(MDPC201915)
出版年
2024