Anti-earthquake Analysis of Nuclear-class UPS Based on HyperWorks

核级UPS是核电站的重要设备之一,对核电厂的安全稳定运行起重要作用。为保证设备质量和可靠性,核级UPS需要进行抗震强度分析确保其通过抗震试验鉴定,使其满足当电厂实际发生地震的烈度在鉴定试验抗震响应谱的包络范围内设备能够安全运行。使用HyperWorks软件对核级UPS进行结构抗震强度分析,以确保其结构设计满足核级设备的抗震要求。The nuclear-class( 1E class) UPS,as the significant power supply in nuclear power plant,plays a dual role in protecting and controlling the power supply,which is vital to the safe and stable operation of nuclear power plants. In order to improve reliability of power supply,UPS of nuclear power plant requires enough anti-earthquake ability,which means that the mechanical properties of the UPS during the process of designing and producing should be fully considered. What 's more,for ensuring the safe operation of equipment,it is indispensable for effective structural strength analysis and anti-earthquake analysis to make UPS cover earthquake response spectrum of given. In this paper,we innovatively use Hyper Works software into structural anti-earthquake intensity analysis of nuclear-grade UPS,to ensure the structure design satisfies the demands of nuclear-class devices

基于改进多元多尺度色散熵的齿轮箱多通道振动信号故障诊断

齿轮箱发生故障时，其振动信号具有不平稳和非线性等特征，而常用的齿轮箱故障诊断方法大多是建立在单通道振动信号分析基础上，容易造成故障信息丢失，故而在工业生产中实用性受限。为了克服此缺陷，将多元多尺度色散熵引入到齿轮箱故障诊断当中，并改进其粗粒化方式，提出了改进多元多尺度色散熵，用以提取齿轮箱多通道振动信号的故障信息。在此基础上，提出一种基于集合经验模态分解，改进多元多尺度色散熵和遗传算法优化支持向量机的齿轮箱故障诊断方法。通过实验数据分析，并与多元多尺度样本熵、多元多尺度模糊熵等现有方法相比较，证明该方法具有更高的准确率和稳定性，且在处理短时间序列时具有明显优势

Shell Evolution Study for New Magic Number N =32 via Isochronous Mass Spectrometry

<span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; line-height: 22px; background-color: rgb(248, 248, 248);">Recent results and progress of mass measurements of neutron-rich nuclei utilizing Isochronous Mass Spectrometry (IMS) based on the HIRFL-CSR complex at Lanzhou are reported. The nuclei of interest were produced through projectile fragmentation of primary 86Kr ions at a realistic energy of 460.65 MeV/u. After in-flight separation by the fragment separator RIBLL2, the fragments were injected and stored in the experimental storage ring CSRe, and their masses were determined from measurements of their revolution times. The re-determined masses were compared and evaluated with other mass measurements, and the impact of these evaluated masses on the shell evolution study is discussed.</span

Direct mass measurements of neutron-rich ~(86)Kr projectile fragments and the persistence of neutron magic number N=32 in Sc isotopes

<span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; line-height: 22px; background-color: rgb(248, 248, 248);">In this paper, we present direct mass measurements of neutron-rich Kr-86 projectile fragments conducted at the HIRFL-CSR facility in Lanzhou by employing the Isochronous Mass Spectrometry (IMS) method. The new mass excesses of 52-54SC nuclides are determined to be -40492(82), -38928(114), -34654(540) keV, which show a significant increase of binding energy compared to the reported ones in the Atomic Mass Evaluation 2012 (AME12). In particular, Sc-53 and Sc-64 are more bound by 0.8 MeV and 1.0 MeV, respectively. The behavior of the two neutron separation energy with neutron numbers indicates a strong sub-shell closure at neutron number N=32 in Sc isotopes.</span