Results 31 to 40 of about 1,037 (130)
Experimental study on seismic performance of composite reinforced structure with shock absorption and energy dissipation of potentially collapsedrock mass [PDF]
At present, there are two types of structures for strengthening dangerous rock mass in earthquake area construction: anchorage and retaining. The connection between the two types of reinforced structures and the dangerous rock mass is rigid with very ...
Aishe ZHANG +5 more
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Jianzhu Gangjiegou Jinzhan, 2013 针对钢框架梁柱弱轴连接翼缘削弱型节点的滞回性能和骨架曲线,参照梁柱强轴连接的削弱参数,设计了梁柱弱轴连接翼缘削弱型节点系列试件,应用有限元软件ANSYS研究了削弱区中心至柱中心线距离、削弱宽度以及削弱深度对节点滞回性能的影响。研究结果表明:在往复荷载作用下,节点屈服以前,模型的削弱参数对节点的骨架曲线影响不大;节点屈服以后,削弱参数对节点的屈服荷载和极限承载力的影响比较明显,其中削弱部位的深度对骨架曲线的影响最大,削弱区中心至柱中心线距离对骨架曲线的影响次之,削弱部位长度对骨架曲线的影响最小 ...
郁有升, 孙婷, 王燕
doaj
水平荷载作用下外挂ALC板-钢框架体系抗裂与滞回性能试验研究
Jianzhu Gangjiegou Jinzhan, 2023 蒸压轻质混凝土（ALC）板是一种被广泛应用于装配式建筑围护体系的墙板，为研究外挂ALC墙板-钢框架体系的滞回性能和ALC墙板的抗裂性能，进行了4榀足尺2层框架低周往复加载试验，以墙板-框架连接方式、勾缝做法和饰面做法为试验参数，记录了典型试验现象，获得了滞回曲线、骨架曲线和刚度退化曲线等结果。研究表明：外挂ALC墙板可提高框架体系的初始抗侧刚度和承载力；钩头螺栓试件抗裂性能最佳，内置锚试件抗裂性能次之，滑动螺栓试件抗裂性能最差；在弹性层间位移角达到1/250之前，不同勾缝做法和饰面涂料均可满足抗裂要求 ...
陈杰 +6 more
doaj
Seismic Response Analysis of Small Modular Reactor Containment Based on LRB and FPS Isolation Strategies [PDF]
Small modular reactor (SMR) refers to a new generation of reactors with a unit power output of less than 300 MW. These reactors utilize innovative technologies for modular design and rapid on-site assembly.
JI Xiaoyu1, CHEN Nanyu1, CHEN Mufeng2, ZHANG Shuaijun1, HOU Gangling1, CAI Xuesong1
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, 2020 双向传动误差法是基于传动误差检测的动态连续回差检测方法。为解决传统滞回曲线静态检测RV减速机存在的拟合误差问题，提出了一种改进的滞回曲线法，通过改变检测步骤使测量数据形成连续闭合的曲线，规避了数据拟合造成的测量结果误差。对比分析滞回曲线与双向传动误差法检测回差，在相同转矩下，前者测得的是某一啮合点对应的回差，后者测得的是回差的变化曲线；在不同载荷下，前者测得的是回差随转矩的变化曲线，后者测得的是回差变化的曲线簇，不仅反映了回差随啮合位置的波动，也反映了回差随载荷的变化。以RV40E样机进行测试 ...
刘红帝 +4 more
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Research on Self-mixing Interference Effect and Micro-vibration Measurement of Semiconductor Laser at Moderate Feedback Condition [PDF]
, 2013 根据光反馈自混合干涉效应的基本理论模型,通过求解适度反馈下的相位方程,讨论了半导体激光器的运行模态及特性,并搭建自混合干涉测量实验系统进行实验研究,与模拟仿真结果进行对比分析。在此基础上,实验研究表明扬声器的振幅与驱动电压成良好的线性关系。The operating states and features of semiconductor lasers are discussed based on basic theory models of laser feedback self-mixing ...
王慧, 王路, 罗勋, 黄文财
core
Bouc-Wen-Baber-Noor i滞回模型的参数敏感性分析 [PDF]
, 2019 本文以单自由度Bouc-Wen-Baber-Noori(BWBN)弹塑性体系为研究对象,利用MATLAB求解地震荷载作用下的弹塑性时程响应,在BWBN模型滞回参数的取值区间内,通过拉丁超立方抽样,研究了各种滞回参数对单自由度体系动力时程响应(最大弹塑性位移、最大速度、非线性滞回位移和累积滞回耗能)的敏感性。研究结果表明BWBN单自由度体系的弹塑性动力时程响应对结构屈服前后的刚度比α,刚度退化参数δη,捏缩强度系数q具有较大敏感性。国家青年自然科学基金项目（51908478 ...
刘涛
core
Controllability design of a memristive hyperchaotic map and the construction of optical fiber secure communication system [PDF]
A discrete hyperchaotic map was constructed by introducing nonlinear feedback of the square memristor function, which has the properties of total amplitude control, partial amplitude control, and direct offset boosting of hyperchaotic sequences.
AKGUL Akif +4 more
core +1 more source
, 2021 采用ABAQUS软件对一种新型装配式钢管柱轻钢桁架梁节点进行了数值模拟,重点考察分析了桁架梁连接方式、桁架梁高度、桁架梁弦杆截面、桁架梁弦杆壁厚对其滞回性能、抗弯承载力、节点转动刚度、耗能等的影响。分析结果表明:装配式钢管柱轻钢桁架梁节点的滞回曲线呈现出捏缩特征,但具有较高的抗弯承载力和理想的节点转动能力;塑性铰出现在桁架梁端部空腹节间,实现了理想的延性破坏模式;弦杆采用闭口矩形钢管截面及增加桁架梁高度和弦杆壁厚,均可提高此类节点的抗弯承载力 ...
刘文渊 +4 more
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