Results 61 to 70 of about 50,905 (223)
Jianzhu Gangjiegou Jinzhan, 2023 为分析钢底板波形钢腹板梯形组合箱梁的畸变效应，利用圣维南原理考虑顶底板对波形钢腹板的约束作用，将组合箱梁等效为钢箱梁的过程中保持面内外抗弯刚度不变，基于板元框架法建立畸变控制微分方程并导出克雷洛夫函数形式的通解。结合数值算例的对比分析验证所提方法的合理性，并研究腹板俯角和梁高变化对畸变双力矩的影响。结果表明：相较于完全忽略腹板的面内抗弯刚度，考虑顶底板对腹板的约束作用更合理；波形钢腹板和钢底板对箱梁的畸变翘曲刚度和横向框架刚度均有较大程度的削弱 ...
陈东亮, 张元海, 刘泽翔
doaj
Simulation Analysis and Optimization of Coach Seat and Passenger Coupling Impact System [PDF]
, 2015 据相关资料表明，在客车碰撞所造成的人员伤亡中，因乘员与座椅之间的二次碰撞或座椅与车体相连部位的失效占了相当大的比例。为了提高我国客车在碰撞事故中对乘员的保护能力，客车座椅及其固定点强度的国家标准GB13057-2014目前已从推荐性标准升级为强制性实施标准。为了保证所设计的座椅能满足新法规要求，必须深入研究客车座椅及其固定支架的结构变形及乘员在碰撞过程中的伤害情况。 汽车碰撞过程是一个瞬间的复杂的物理变形过程，它包含了几何非线性，材料弹塑性变形非线性和零部件间复杂的接触非线性等特征 ...
卢琳兆
core
Coalition Breakdown and Subsystem Exit
Policy Studies Journal, EarlyView.ABSTRACT Why actors choose to work together (or not) to advance policy has been the central area of inquiry within the Advocacy Coalition Framework (ACF). Existing research has mainly emphasized the pathway towards coalition formation and evolution, underscoring the stable patterns of allies and opponents observable in policy processes over a decade or
Charlie F. Thompson
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2009 本文采用ANSYS有限元软件分析了8个不同节点构造的"梁贯通式"钢筋混凝土柱-钢梁（RCS）边节点的抗剪性能,详细分析了RCS节点柱上端相对侧移及其组成、侧向荷载-剪应变、节点区各组成元件的抗剪承载力、节点剪力-变形曲线、钢腹板应力的发展过程、试件破坏时的应力应变分布等。结果表明,RCS节点变形是三维空间变形,内、外混凝土之间存在相对转动;RCS节点总变形由剪切变形和承压变形组成,即使发生节点剪切破坏,承压变形也占有较大比例;RCS节点抗剪由三部分组成:钢腹板、内混凝土和外混凝土,如设有钢柱面板 ...
申红侠, 燕练武, 顾强
doaj
Governing by Ambiguity: Sociotechnical Imaginaries of Platforms in China
Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT Besides clear policy directives, the unresolved and open‐ended elements in policy communication also create discursive politics. This article argues that ambiguity in policy communication reflects the state's exercise of power within a fractured sociocultural landscape.
Fangyu Qing, Ngai Keung Chan
wiley +1 more source
Gaoya dianqi, 2016 文中介绍了一起停电试验发现的220 k V变压器低压绕组变形缺陷,为变压器累积效应的理论研究和变压器故障检测的试验研究提供现场数据诊断案例。试验检修人员首先根据变压器短路阻抗试验和绕组变形试验结果,推断出低压绕组发生不同程度变形;并结合该变压器历年遭受短路冲击后的色谱分析试验结果,综合分析、诊断发生变形的原因,主要由于低压侧短路电流冲击及绕组变形的累积效应。通过返厂解体发现,其低压绕组发生不同程度的变形,并存在过热现象,验证了试验和诊断结果。通过变压器绕组变形试验诊断,有效避免了一起设备潜伏性故障的发生,
于洋 +6 more
doaj
ABCA12 Frameshift Deletion in Domestic Cats With Ichthyosis Fetalis
Veterinary Dermatology, Volume 37, Issue 3, Page 365-374, June 2026.ABSTRACT Background Ichthyosis fetalis (IF), also known as harlequin ichthyosis, is a rare and often fatal autosomal recessive congenital skin disorder. It is characterized by thickened, hard skin plaques and deep skin fissures that limit mobility and cause malformations of the eyes, lips and ears.
Jeanna M. Blake +2 more
wiley +1 more source
Gaoya dianqi, 2019 变压器绕组变形与等效电参数变化的对应关系对变压器绕组变形诊断精度有重要影响。通过建立变压器绕组等效电路模型,得到了绕组结构与等效电参数之间的对应关系。在此基础上,以某变压器为例,运用电磁—结构耦合有限元方法,根据弹塑性力学原理,计算了变压器绕组在短路电磁力作用下发生的塑性变形状态、应力分布及绕组的轴向和辐向位移;然后,运用能量法计算得到了不同类型和程度的绕组变形与绕组等效电路电参数之间的对应关系。研究结果可以为从等效电路参数变化的角度诊断变压器绕组变形状态提供依据,从而提高变压器绕组变形诊断精度。
毛辰 +10 more
doaj
Nonlinear finite element analysis for seismic performance of high-strength concrete beam-column joints with new reinforcement details [PDF]
, 2006 Because the factors that affect the behavior of the beam-column joints are complicated, an experimental study alone is not sufficient. Therefore, a nonlinear finite element analysis was conducted to provide better understanding of the performance of the ...
Gan, L, Li, J, Pam, HJ
core
工程建设, 2020 文章结合磨万铁路会富莱隧道工程实践，在了解了碳质板岩地层发生大变形的原因和机理的基础上，对高地应力条件下软岩大变形的控制技术进行了分析研究，选择科学合理的开挖方法、施工工序和支护方式、控制围岩的大变形，实现软岩大变形条件下的安全、快速施工。
海华 蒋
semanticscholar +1 more source