永安地震台钻孔体应变地震响应能力评估

统计永安地震台2007—2013年体应变记录的地震同震响应,与同期国家地震台网大震速报目录对比,响应率为15.21%。绘制地震能力线,量化评估永安地震台体应变仪映震能力,得到钻孔体应变对不同震级地震的响应范围为:震级5.5级,震中距425 km;震级6级,震中距860 km;震级7.0级,震中距3 514 km;震级7.5级,震中距7 104 km。     

南平地震台水管倾斜仪常见故障分析及检修

文章在介绍DSQ型水管倾斜仪基本原理及系统结构的基础上,结合南平地震台多年的维修维护经验,着重对水管倾斜仪的常见故障进行分析,介绍检修方法,为其他地震台站同类仪器的维护检修提供参考。     

基于粘性流模型的筒型基础防波堤波浪力数值分析

筒型基础防波堤是一种新型港口海岸工程结构,其基础上部是由连续排列的圆筒构成的直立防浪墙.采用粘性流数值模型,研究连续圆筒防波堤上波浪力竖向分布、水平(沿圆筒环向)分布和波浪力合力特性,并对粘性流数值模型计算的平面直墙波浪力与海港水文规范方法计算结果;粘性流数值模型计算的连续圆筒墙面波浪力与平面直墙波浪力;无限长连续圆筒墙面波浪力与有限长连续圆筒墙面波浪力进行比较分析.针对所选工程算例,建议按<海港水文规范>中平面直墙波浪力计算方法确定连续圆筒防波堤上的波浪力时,波峰时考虑0.90左右的折减系数,波谷时考虑0.95左右的折减系数.     

永安无人值守地震台远程网络监控系统

针对永安无人值守地震台设备维护及安全巡视等问题,利用地震台现有网络搭建方式,使用网络摄像机及相应监控系统软件,通过合理配置,实现无人值守地震台远程网络视频监控。该系统的实现,提高了永安地震台管控无人值守台站的能力,对其他地震台有一定借鉴意义。     

TJ-Ⅱ型钻孔应变仪维护技术

介绍TJ-Ⅱ型钻孔应变仪的基本原理与系统构成,着重介绍仪器常见故障的现象与原因,以及检修方法与流程。     

显著地震地方平太阴时在台湾强震中应用研究

正than two remarkable earthquakes before the strong earthquake, and 9 groups had more than two remarkable earthquakes before the strong earthquake袁about 64%of the total earthquakes. Among the 9 groups, the local mean lunar times angle of remarkable earthquake before the earthquake was greater than 45毅in only 1 group袁and the local mean lunar times angle were less than 45毅in other 8 groups. Meanwhile, the main earthquakes occurred within 29 days after the remarkable earthquakes. The results show that the angle of local mean lunar times less than 45毅can be applied to the short-impending prediction before strong earthquake in Taiwan area.Keywords院Local mean lunar times曰Remarkable earthquake曰Earthquake prediction曰Taiwan area     

Numerical Simulation on Oscillation-Sliding-Uplift Rock Coupled Motion of Caisson Breakwater Under Wave Excitation

Corresponding to the sliding and the overturning failure, the elementary motion modes of caisson breakwater include the horizontal-rotational oscillation coupled motion, the horizontal sliding-rotational oscillation coupled motion, the horizontal vibrating-uplift rocking coupled motion, and the horizontal sliding-uplift rocking coupled motion. The motion mode of a caisson will transform from one to another depending on the wave forces and the motion behaviors of the caisson. The numerical models of four motion modes of caisson are developed, and the numerical simulation procedure for joint motion process of various modes of caisson breakwater under wave excitation is presented and tested by a physical model experiment . It is concluded that the simulation procedure is reliable and can be applied to the dynamic stability analysis of caisson breakwaters.     

直立防波堤振动──滑移运动分析的模型和方法

建立了一个动力系统模型及相应分析方法,对破碎波冲击作用下直立式防波堤的振动-滑移运动过程进行数值模拟,预测特殊波浪力作用下防波堤可能出现的滑移量.用本文模型和方法对一沉箱防波堤在破碎波作用下的运动过程进行了计算,并分析了沿基床顶面的滑移对沉箱位移、摇摆角、滑移力和倾覆力矩的影响.     

Numerical Simulation on Oscillation-Sliding-Uplift Rock Coupled Motion of Caisson Breakwater Under Wave Excitation

Corresponding to the sliding and the overturning failure, the elementary motion modes of caisson breakwater include the horizontal-rotational oscillation coupled motion, the horizontal sliding-rotational oscillation coupled motion, the horizontal vibrating-uplift rocking coupled motion, and the horizontal sliding- uplift rocking coupled motion. The motion mode of a caisson will transform from one to another depending on the wave forces and the motion behaviors of the caisson. The numerical models of four motion modes of caisson are developed, and the numerical simulation procedure for joint motion process of various modes of caisson breakwater under wave excitation is presented and tested by a physical model experiment. It is concluded that the simulation procedure is reliable and can be applied to the dynamic stability analysis of caisson breakwaters.