Results 41 to 50 of about 18,273 (143)
Jianzhu Gangjiegou Jinzhan, 2020 弯扭箱形钢构件是指在箱形钢构件的基础上,2个端部绕构件轴线发生扭转、沿构件纵向发生弯曲的复杂构件。因优美的建筑造型,弯扭箱形钢构件近年来在国内外的大跨度空间结构中逐步得到应用,然而目前对于弯扭箱形钢构件的受拉性能和破坏机理尚缺乏系统性的研究。利用ABAQUS有限元程序建立了受拉作用下弯扭箱形钢构件的数值分析模型,通过试验验证了计算模型的准确性。研究了钢材强度、弯曲曲率、截面相对扭转角和钢板厚度等参数对弯扭箱形钢构件受拉承载力的影响规律。分析结果表明:随着钢材强度和钢板厚度的增加 ...
吴安旭 +4 more
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Inverse Thermal Softening Behavior in a High‐Entropy Alloy Under Various Strain Rates
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Although face‐centered cubic high‐entropy alloys (HEAs) have received extensive attention and in‐depth research, most existing studies focus on single temperature or strain rate conditions, lacking systematic investigations into deformation mechanisms under extreme thermomechanical coupling environments.
Zhi Wang +6 more
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Lung cancer remains a major cause of cancer‐related mortality worldwide, and non‐small cell lung cancer (NSCLC) accounts for the largest proportion of diagnosed lung cancer cases. Exosomal programmed death‐ligand 1 (PD‐L1) has attracted increasing attention as a potential liquid‐biopsy biomarker associated with tumor immune regulation; however,
Chen Su +6 more
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考虑信息节点失效的电力信息物理系统脆弱性评估方法 [PDF]
全球能源互联网, 2019 随着信息系统与电力物理系统的深度融合，现有电网系统正在向电力信息物理系统（cyber physical power system, CPPS）发展，CPPS不仅需要应对来自物理层面的破坏，还受到来自信息层面的威胁。针对电网所受的威胁，建立了信息物理层相互耦合的故障模型，提出了一种综合电力节点重要程度及信息网络拓扑结构的评估指标。在仿真研究中，攻击者对高指标节点进行信息攻击并导致其失效，电网以负荷削减最小量为目标进行优化调度，进而根据所提指标辨识耦合网络脆弱环节。以IEEE-30节点系统作为算例进行分析 ...
连祥龙, 张文浩, 钱瞳, 唐文虎
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社会科学前沿乡村振兴是农业、农村、农民三位一体的振兴，缺少任何一方都是不完整的。科技农业、绿色农业的发展是对乡村振兴的基本要求，要贯彻落实农业高质量发展，须得摆脱传统的资源耗费型、环境污染型农业生产方式，实现新质生产力与农业发展的有效结合；数字化乡村建设、城乡一体化发展要求乡村建设摆脱传统的资源耗费型管理方式，实现“人+资源+科技”的协同发力，以此才能建立城乡融合机制和平台；农民自身发展要求新时代农民必须接受互联网、数字化等高科技技术和科学知识。新质生产力是新时代更进步的生产力，对于乡村振兴有重要的推动作用 ...
Si-Hui Huang
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Functionalized Silica‐Constructed Self‐Supporting Composite Separator for Lithium Metal Batteries
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Lithium metal batteries (LMBs) are considered highly promising next‐generation energy storage systems owing to their exceptionally high theoretical specific capacity and ultralow electrochemical potential. Nevertheless, the practical deployment of LMBs is still severely restricted by the uncontrollable formation and propagation of lithium ...
Li Chen +6 more
wiley +1 more source
Shiyou jixie, 2015 压缩机曲轴在工作中受力情况极为复杂，曲轴作为压缩机最重要的零部件之一，一旦失效将会导致整个压缩机的损坏。鉴于此，以2RDS压缩机曲轴为例，采用INVENTOR三维建模软件建立曲轴模型，使用有限元分析软件ABAQUS对其进行应力分析。分析结果表明，曲轴的应力最大位置均出现在主轴颈-I的油孔处，在曲柄与曲柄销和主轴颈与曲柄销过渡圆角处均出现了应力集中，但是最大应力均小于材料的许用应力，结构不会出现静强度破坏。曲轴在压工况时的受力比拉工况时的受力更加恶劣，应力集中情况更加严重 ...
侯小兵
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Boosting Decomposition and Combustion of TKX‐50 and HTPB/TKX‐50 Propellants With NH2‐MIL‐88B(Fe) MOF
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Dihydroxylammonium 5,5′‐bistetrazole‐1,1′‐diolate (TKX‐50) is a promising energetic material that possesses both exceptional energy density and low sensitivity. Nevertheless, its application is hindered by incomplete pyrolysis during combustion or explosion. Various strategies, including eutectic formation, composite preparation, and catalysis,
Jingwen Chen +10 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan为研究T形钢管混凝土柱-H形钢梁侧接板式节点的受力机理，对该节点进行了有限元模拟和理论分析研究。首先建立Abaqus有限元数值模型，通过试验结果验证了数值模型的合理性；根据节点构造特点，推导了该节点的受弯承载力和受剪承载力计算公式，并采用数值模型算例进行验证；基于计算公式分析不同变量对节点受弯承载力和受剪承载力的影响。研究结果表明：给出的有限元模型能够有效模拟侧接板式节点的工作状态和极限承载力；侧接板式节点的受弯破坏有4种破坏形态，通过合理构造可以确保首先出现钢梁翼缘受拉屈服破坏，实现节点的延性破坏 ...
程卫红, 储德文, 时继瑞
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Shiyou jixie, 2015 油管悬挂器是水下采油树的核心部件，其锁紧机构对油管悬挂器至关重要。阐述了油管悬挂器锁紧机构的组成、锁紧及解锁原理，确定了锁紧方案和解锁方案。对锁紧块在锁紧和解锁工况下的受力进行分析，得出2种工况下的推动环倾角均为45°。分析了单齿锁紧块和多齿锁紧块的受力情况和力传递途径，推导出单齿锁紧块和多齿锁紧块在X方向和Y方向的受力方程。建立了单齿轮廓和双齿轮廓的有限元模型，研究不同锁紧齿数对载荷传递路径的影响及不同路径应力分布。研究结果表明，2齿形的锁紧块结构更适合油管悬挂器的锁紧机构。
梅静 +4 more
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