Based on the results of triaxial compressive creep tests for five kinds of rock under the different stress loading,unloading and cycle-loading-unloading conditions,the creep deformation is not only a function of stres...Based on the results of triaxial compressive creep tests for five kinds of rock under the different stress loading,unloading and cycle-loading-unloading conditions,the creep deformation is not only a function of stress and time,but also it has the corresponding relations to the triaxial stress-strain curves of rock.The deformation properties of soften-strain,harden-strain and ideal plasticity presented by conventional triaxial compressive test curves under the different stress states were utilized,and the creep characteristics,the creep starting stress and the different entire creep process curves of rock were studied systematically according to creep experiment results,and the relations of the triaxial stress-strain curves to the creeping starting stress,the terminating curve,the different creep processes,and the different creep fracture properties were established.The relations presented in this paper were verified partially by the creep experiment results of five types of rock.展开更多
尽管抽水蓄能已被广泛采用,但其作为能源存储和削峰填谷的首选解决方案,仍面临重大挑战。抽水蓄能电站内部静态变频器(static frequency converter,SFC)的启动过程会引发严重的电能质量问题,可能危及电厂设备完整性或干扰自动化系统。...尽管抽水蓄能已被广泛采用,但其作为能源存储和削峰填谷的首选解决方案,仍面临重大挑战。抽水蓄能电站内部静态变频器(static frequency converter,SFC)的启动过程会引发严重的电能质量问题,可能危及电厂设备完整性或干扰自动化系统。研究抽水蓄能电站SFC起动过程谐波传递机理,可为抽水蓄能电站治理装置布局提供理论参考。首先,建立SFC网侧电流数学模型,分析抽水蓄能电站SFC起动过程的谐波特性;其次,根据某抽水蓄能电站的实际参数,建立该电站输电线路和变压器的谐波传递模型,推导出谐波电流和电压的传递系数,结合仿真结果阐明谐波在该电站内的传递机理;最后,基于该抽水蓄能电站的实际测试结果,验证了该抽水蓄能电站谐波传递机理分析的准确性,该分析结果具有普适性,可为其他抽水蓄能电站谐波传递分析提供理论价值。展开更多
基金Project(50774090) supported by the National Natural Science Foundation of China
文摘Based on the results of triaxial compressive creep tests for five kinds of rock under the different stress loading,unloading and cycle-loading-unloading conditions,the creep deformation is not only a function of stress and time,but also it has the corresponding relations to the triaxial stress-strain curves of rock.The deformation properties of soften-strain,harden-strain and ideal plasticity presented by conventional triaxial compressive test curves under the different stress states were utilized,and the creep characteristics,the creep starting stress and the different entire creep process curves of rock were studied systematically according to creep experiment results,and the relations of the triaxial stress-strain curves to the creeping starting stress,the terminating curve,the different creep processes,and the different creep fracture properties were established.The relations presented in this paper were verified partially by the creep experiment results of five types of rock.
文摘尽管抽水蓄能已被广泛采用,但其作为能源存储和削峰填谷的首选解决方案,仍面临重大挑战。抽水蓄能电站内部静态变频器(static frequency converter,SFC)的启动过程会引发严重的电能质量问题,可能危及电厂设备完整性或干扰自动化系统。研究抽水蓄能电站SFC起动过程谐波传递机理,可为抽水蓄能电站治理装置布局提供理论参考。首先,建立SFC网侧电流数学模型,分析抽水蓄能电站SFC起动过程的谐波特性;其次,根据某抽水蓄能电站的实际参数,建立该电站输电线路和变压器的谐波传递模型,推导出谐波电流和电压的传递系数,结合仿真结果阐明谐波在该电站内的传递机理;最后,基于该抽水蓄能电站的实际测试结果,验证了该抽水蓄能电站谐波传递机理分析的准确性,该分析结果具有普适性,可为其他抽水蓄能电站谐波传递分析提供理论价值。
