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Theoretical analysis and experimental study on the dynamic behavior of a valve pipeline system during an earthquake

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Earthquake Engineering and Engineering Vibration 2021年第4期20卷 969-979页

作者： Xue Ruiyuan yu shurong Zhang Xiheng College of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050China

To study the dynamic behavior of pipeline systems installed with large-mass valves within nuclear power plants during earthquakes,seismic simulation tests are carried out on a pipeline system equipped with a DN80 gate valve,and the FEM updating technique is used to identify the stiffness distribution of the *** conducting tests and a numerical analysis,the following conclusions are obtained:After a large-mass valve is installed in the pipeline,the system shows higher sensitivity to intermediate and high frequency components in the earthquake than low frequency *** is possible for the intermediate frequency components to be amplified by the valve in the horizontal direction,while the pipes tend to amplify the high frequency components in horizontal and vertical *** in the high-order modes of the system depend on valve stiffness *** the existence of a valve makes pipeline system damping distribute with an obvious non-proportional feature,when the response spectrum method is used to calculate the response of the pipeline system,it could result in an underestimation of low-damping positions and overestimation of high-damping positions.

关键词： seismic analysis shaking table test valve nuclear power plant

Identification of Parameters in 2D-FEM of Valve Piping System within NPP Utilizing Seismic Response

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Computers, Materials & Continua 2020年第10期65卷 789-805页

作者： Ruiyuan Xue shurong yu Xiheng Zhang College of Petrochemical Technology Lanzhou University of TechnologyLanzhou730050China

Nuclear power plants(NPP)contain plenty of valve piping systems(VPS’s)which are categorized into high anti-seismic *** such as seismic qualification,health monitoring and damage diagnosis of VPS’s in its design and operation processes all depend on finite element ***,in engineering practice,there is always deviations between the theoretical and the measured responses due to the inaccurate value of the structural parameters in the *** structure parameters identification of VPS within NPP is still an unexplored domain to a large *** this paper,the initial 2D-finite element model(FEM)for VPS with a DN80 gate valve was updated by utilizing seismic *** objective function used in the model updating procedure is the vibration control equation error of the *** experimental results show that the updated 2D-FEM can accurately predict the original dynamic characteristic of the *** was also found the Rayleigh damping coefficients corresponding to the VPS vary slightly with the change in seismic excitation *** research displayed the complete procedure of updating the complex structured initial FEM by utilizing seismic response,and the results show that the parameters can be accurately identified even if the seismic response used for updating merely contained the fundamental frequency information of the structure.

关键词： Seismic response nuclear power plant valve FEM updating parameter identification

Self-Adaptive Control System for Additive Manufacturing Using Double Electrode Micro Plasma Arc Welding

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Chinese Journal of Mechanical Engineering 2021年第3期34卷 285-298页

作者： Nan Li Ding Fan Jiankang Huang shurong yu Wen yuan Miaomiao Han School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Mechanical and Electrical Engineering Lanzhou University of TechnologyLanzhou 730050China

Wire arc additive manufacturing(WAAM)has been investigated to deposit large-scale metal parts due to its high deposition efficiency and low material ***,in the process of automatically manufacturing the high-quality metal parts by WAAM,several problems about the heat build-up,the deposit-path optimization,and the stability of the process parameters need to be well *** overcome these issues,a new WAAM method based on the double electrode micro plasma arc welding(DE-MPAW)was *** circuit principles of different metal-transfer models in the DE-MPAW deposition process were analyzed *** effects between the parameters,wire feed rate and torch stand-off distance,in the process of WAAM were investigated *** addition,a real-time DE-MPAW control system was developed to optimize and stabilize the deposition process by self-adaptively changing the wire feed rate and torch stand-off ***,a series of tests were performed to evaluate the control system’s *** results show that the capability against interferences in the process of WAAM has been enhanced by this self-adaptive adjustment ***,the deposition paths about the metal part’s layer heights in WAAM are ***,the appearance of the WAAM-deposited metal layers is also improved with the use of the control system.

关键词： Double electrode microplasma arc welding Additive manufacturing Wire feed rate Torch stand-off distance Self-adaptive adjustment

积极心理暗示与情绪释放疗法对乳腺癌化疗患者心理痛苦及癌因性疲乏的影响

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贵州医科大学学报 2024年第7期49卷 1077-1081,1087页

作者：缪世茜卢怡余书蓉王小为谭琳德阳市人民医院乳腺外科四川德阳618000

目的分析积极心理暗示与情绪释放疗法对乳腺癌化疗患者心理痛苦及癌因性疲乏的影响。方法110例乳腺癌化疗患者根据不同护理方案分为观察组(情绪释放疗法,n=64)和对照组(积极心理暗示,n=64),于干预前及干预后3个月时,采用焦虑抑郁量表(HA... 详细信息

目的分析积极心理暗示与情绪释放疗法对乳腺癌化疗患者心理痛苦及癌因性疲乏的影响。方法110例乳腺癌化疗患者根据不同护理方案分为观察组(情绪释放疗法,n=64)和对照组(积极心理暗示,n=64),于干预前及干预后3个月时,采用焦虑抑郁量表(HADS)评估两组患者的不良情绪、匹兹堡睡眠质量指数(PSQI)评估睡眠质量、心理痛苦温度计(DT)评估心理痛苦程度、疲乏评估量表(PFS)评估癌因性疲乏、Herth希望量表(HHI)评估希望水平,比较两组患者治疗期间的疾病控制率。结果干预后,观察组HADS(焦虑、抑郁)评分低于对照组,差异有统计学意义(P<0.05);观察组DT评估为无者9例(14.06%)、极度0例(0.00%),对照组DT为无者1例(2.17%)、极度5例(10.87%),两组比较差异有统计学意义(P<0.05);观察组PFS(行为、情感、感知、认知)评分、PSQI评分均低于对照组,HHI评分高于对照组,差异有统计学意义(P<0.05);观察组疾病控制率高于对照组,差异有统计学意义(P<0.05)。结论情绪释放疗法较积极心理暗示更有效地改善乳腺癌患者情绪、心理疼痛、希望水平及睡眠质量,有利于提升化疗效果与改善预后。

关键词：积极心理暗示情绪释放疗法乳腺癌化疗癌因性疲乏

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对流换热场协同的散度效应

化工学报 2011年第9期62卷 2464-2468页

作者：卢小平俞树荣兰州理工大学石油化工学院甘肃兰州730030

场协同原理是基于稳态时层流热边界层的积分方程得到的,其正确性已得到了实验及数值验证。但目前尚缺乏从普遍意义上对场协同角的不同范围与附加当量源性质之间的关系,及其对换热过程产生强化或弱化的内在机理进行理论描述,而这些对于... 详细信息

场协同原理是基于稳态时层流热边界层的积分方程得到的,其正确性已得到了实验及数值验证。但目前尚缺乏从普遍意义上对场协同角的不同范围与附加当量源性质之间的关系,及其对换热过程产生强化或弱化的内在机理进行理论描述,而这些对于应用场协同原理进行传热过程控制是至关重要的。本文通过建立描述对流换热过程的总热通量矢量的散度方程,给出了具有普适性的场协同原理的理论分析方法。结果表明,场协同的程度导致了散度的变化,而由于散度表征了区域内的源与区域边界上流的关系,所以分析场协同角在不同的变化范围时的散度效应,可以得到区域内附加当量源的性质,以及区域边界上总热通量矢量大小及方向的变化情况,从而说明流体流动换热过程被强化或弱化的原因。

关键词：对流换热场协同理论分析散度方程

5056铝合金/镀锌钢预置涂粉激光熔钎焊组织及性能研究

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机械工程学报 2014年第12期50卷 83-88页

作者：余淑荣蒋锴樊丁兰州理工大学机电工程学院兰州730050 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室兰州730050

针对铝/钢焊接的技术难点,采用预置金属粉末的方法,对5056铝合金与ST04Z镀锌钢板进行CO2激光搭接熔钎焊,分析熔钎焊接头成形、接头连接界面的显微组织及其力学性能。结果表明,选择合适的焊接参数,涂粉后能够实现铝合金与镀锌钢的优质连... 详细信息

针对铝/钢焊接的技术难点,采用预置金属粉末的方法,对5056铝合金与ST04Z镀锌钢板进行CO2激光搭接熔钎焊,分析熔钎焊接头成形、接头连接界面的显微组织及其力学性能。结果表明,选择合适的焊接参数,涂粉后能够实现铝合金与镀锌钢的优质连接;熔钎焊接头没有明显的针状Al-Fe金属间化合物向熔化区析出,且过渡层最大厚度小于10μm,在熔化区边缘和熔化区与铝合金结合处熔钎焊根部出现两个富Zn区,Si、Zn、Mn、Mg等元素与Fe和Al或直接形成化合物,或形成固溶物,抑制了Al与Fe直接接触形成脆硬的金属间化合物;接头拉伸试样断裂形式有母材热影响区断裂和焊缝处断裂两种,焊缝处断裂面在铝熔化区一侧,接头平均机械抗力达190 N/mm,约为母材的85.2%。采用此方法可减小铝/钢熔钎接界面过渡层厚度,获得力学性能良好的熔钎焊接头。

关键词：激光焊接铝钢熔钎焊金属间化合物

Preparation and Characterization of a New Desulfurizer and Its Performance on Removal of SO<sub>2</sub>

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Journal of Geoscience and Environment Protection 2014年第2期2卷 68-76页

作者： Ting Zhang Junqing Li shurong yu Yi Wang School of Petrol-Chemical Engineering Lanzhou University of Technology Lanzhou China

Sulfur dioxide is one of the major pollutants resulting from fuel combustion. In this study, CaO and attapulgite were utilized as raw material for synthesizing CaO/attapulgite (CaO/ATP) desulfurizer. The physicochemical characteristics of CaO/ATP desulfurizer were evaluated by various techniques such as XRD, SEM, FT-IR. The performance of samples was studied in dynamic conditions. Major factors affecting on desulfurization such as weight ratio of CaO to total, types of modifiers, roasting time and temperature were investigated. The desulfurization agent synthesized under optimal synthesis conditions with CaO content of 30 wt% and NaOH modifier, and the desulfurization roasting time of 2 hours and roasting temperature of 600°C, exhibit sulfur tolerance of 10.15 wt%. This desulfurizer with excellent absorbency and catalysis of desulfurization, economical and?environment-friendly, could be especially useful in industrial applications.

关键词： Attapulgite CaO Desulfurization SO2 Adsorption

我国Q热立克次体分离株cbhE'和cbbE'基因的扩增

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中华微生物学和免疫学杂志 1996年第3期16卷 216-219页

作者：余全俞树荣第三军医大学微生物学教研室重庆630038

用聚合酶链反应（ＰＣＲ）首次对我国Ｑ热立克次体分离株质粒上的特异ＤＮＡ片段ｃｂｈＥ＇和ｃｂｂＥ＇基因进行扩增，目的序列分别为２５８ｂｐ和１４８５ｂｐ。实验结果显示，在我国分离的８株Ｑ热立克次体株中，３株出现了２５８ｂ... 详细信息

用聚合酶链反应（ＰＣＲ）首次对我国Ｑ热立克次体分离株质粒上的特异ＤＮＡ片段ｃｂｈＥ＇和ｃｂｂＥ＇基因进行扩增，目的序列分别为２５８ｂｐ和１４８５ｂｐ。实验结果显示，在我国分离的８株Ｑ热立克次体株中，３株出现了２５８ｂｐ阳性扩增带，５株有１４８５ｂｐ扩增带；两对引物只扩增Ｑ热立克次体的ＤＮＡ。研究证明，我国分离的Ｑ热立克次体株也分别带有ＱｐＨＩ和ＱｐＲＳ型质粒，存在急、慢性分离株之分，但分离株所含质粒类型并不完全与其菌株感染的临床表现相吻合。

关键词：聚合酶链反应 Q热立克次体 cbhE'基因

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基于层次分析法的管道风险因素权数确定

天然气工业 2005年第6期25卷 132-133页

作者：俞树荣马欣梁瑞刘展兰州理工大学石油化工学院

管道风险评估是确定那些可能导致管道事故和有利于潜在事故预防的至关重要的因素,对这些风险因素的发生概率和其后果的严重性进行量化,确定高风险管段的性质和部位,为管道风险决策和风险管理提供可靠的基础依据。在管道风险评估中确定... 详细信息

管道风险评估是确定那些可能导致管道事故和有利于潜在事故预防的至关重要的因素,对这些风险因素的发生概率和其后果的严重性进行量化,确定高风险管段的性质和部位,为管道风险决策和风险管理提供可靠的基础依据。在管道风险评估中确定管道风险因素的权数是一个重要环节。权数分配的结果直接关系到评价结果的精确程度。为提高权数的合理性,应用系统工程中的层次分析法,通过两两比较对非定量事件作定量分析,对主观判断作客观描述,减少主观因素可能带来的偏差。以管道风险因素框图为模型,介绍利用层次分析法确定因素权数的具体过程,进行每一项风险因素相对于管道事故的权数计算。

关键词：管道风险评估层次分析法风险管理权数分配逻辑性