Results 41 to 50 of about 6,162 (165)
Jianzhu Gangjiegou Jinzhan, 2022 为了研究腹板开椭圆孔耗能支撑的滞回性能，进行了3个支撑试件的低周往复加载试验，研究支撑长细比和耗能腹板长度对这种支撑耗能能力和滞回性能的影响，得到试件的滞回曲线、骨架曲线、刚度退化曲线、延性系数、等效黏滞阻尼比等。试验结果表明：在低周往复荷载作用下，腹板开椭圆孔耗能支撑依靠腹板开孔板件进入塑性耗散能量。耗能支撑滞回曲线饱满，耗能能力强，初始刚度较高。孔间板件断裂破坏导致耗能支撑试件失效，试件呈现延性破坏。试验过程中，中部工字钢保持弹性状态，没有进入塑性。相同长细比下耗能腹板的长度越长 ...
沈婷悦, 赵宝成
doaj
Ternary Distillation Drying Process with Pore Protection and Its Applications [PDF]
, 2017 多孔材料应用广泛，其孔道特性对其应用过程中表现的性能具有很大影响。而在多孔材料的制备过程中，干燥方式对产品性能的影响极大，因而选择合适的干燥方法尤为重要。虽然工业上已经有超临界干燥、冷冻干燥、共沸蒸馏等护孔干燥方法，但仍然存在不同的问题。为此，本论文工作在共沸蒸馏的基础上，提出含有置换剂+改性剂+水的三组分蒸馏护孔干燥作为多孔材料干燥的一种方法，以SiO2等系列多孔材料的干燥为对象，系统研究所提出的干燥方法；进一步研究MgO多孔材料的干燥和应用，并与超临界干燥获取的产品进行比较 ...
刘怡畅
core
Integrative Conservation, Volume 4, Issue 2, Page 246-253, June 2025.After the great Chinese poet Qu Yuan (屈原) was exiled to Xupu (溆浦) county in Hu' nan province, he described the forest there as follows: “mysterious is the deep forest, the place where Yuán yòu dwell (深林杳以冥冥兮,乃猿狖之所居).” What is the referent of the name Yuán yòu in this sentence?
Kefeng Niu
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2020 中心支撑抗侧刚度大,但在设防地震作用下支撑杆容易失稳,为了避免支撑杆失稳,并解决耗能支撑震后不易修复的问题,提出了一种装配式工字钢腹板开孔屈服耗能支撑。采用ABAQUS有限元软件分析了设计参数对其滞回性能、刚度和承载力的影响,提出了刚度和屈服承力的计算公式,并给出了装配式工字钢腹板开孔耗能支撑的设计方法。分析结果表明:装配式工字钢腹板开孔屈服耗能支撑主要依靠开孔腹板屈服耗能,有效避免了支撑杆发生整体失稳,具有良好的滞回性能;有限元分析过程中,连接螺栓始终保持弹性,连接可靠;开孔腹板长度 ...
孙筱玮, 赵宝成, 沈晓明
doaj
Failure behavior analysis of high stiffener web height I-girders of cruise ships considering initial welding defects [PDF]
ObjectiveHigh stiffener web height I-girders on large cruise ships are made of thin welded plates, which lead to noticeable weld distortion and stresses during manufacturing, and can affect the load-bearing characteristics of the structure. Therefore, in
Chen CHEN +4 more
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Integrative Conservation, Volume 4, Issue 1, Page 85-94, March 2025.Chromolaena odorata and Ageratina adenophora are invasive species in Southern Yunnan, China; they have very differing, yet overlapping, climate niches. Both invaders produce a large number of small pappus‐bearing achenes every year. They grow in, and their seeds are dispersed to, both suitable and marginal habitats.
Bin Wen +5 more
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Jianzhu Gangjiegou Jinzhan由于钢板具有优越的抗剪性能，故其被广泛地应用于建筑结构以及船舶海洋工程中。在实际工程中，由于使用中的需要或者锈蚀等原因，钢板开孔的现象屡见不鲜。开孔会减小钢板的有效抗剪面积进而降低抗剪承载能力。本文开展了矩形孔和圆形孔两种开孔类型对钢板抗剪承载力影响的研究。通过试验研究了开孔位置、开孔率对钢板抗剪承载力的影响。结果表明：开孔位置对钢板抗剪承载力有显著影响；抗剪承载力的降低程度不能简单通过开孔率进行评估。在此基础上，通过理论和试验验证了数值模型的可靠性 ...
杨斌, 赵炳震, 杜颜胜, 赵中伟
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Jianzhu Gangjiegou Jinzhan, 2014 介绍了一种在梁腹板及下翼缘开孔,并在翼缘开孔处安装摩擦阻尼器的新型节点。利用有限元软件ANSYS分析了铝合金滑动板与梁下翼缘之间的摩擦系数、开孔宽度、开孔距柱翼缘距离和开孔高度等参数变化对新型节点抗震性能的影响,并对各系列新型节点试件与传统节点试件的抗震性能进行了分析比较。分析结果表明:各系列新型节点试件与传统节点试件的滞回曲线都比较饱满,表现出了较好的滞回性能。但各系列新型节点试件的延性及耗能能力要远远优于传统节点试件,且各系列新型节点试件都能够迫使塑性铰远离节点区,而出现在开孔处 ...
毛剑, 郑宏
doaj
Performance optimization and lightweight design of floating raft vibration isolation system based on RBF-PSO algorithm [PDF]
ObjectiveTo address the challenges of heavy workload and long iterative cycles in the lightweight design of floating raft vibration isolation system in engineering applications, this study proposes a lightweight design method based on RBF-PSO multi ...
Guanjun ZHANG +3 more
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