共查询到19条相似文献,搜索用时 515 毫秒
1.
2.
故障树的模糊分析是传统的故障树分析的推广,具有更广的适用范围。从工程实际出发,提出了一种混合型故障树模糊分析的方法,从而为燃气轮机等复杂系统的可靠性定量分析提供了一种有效的工具。该方法兼有传统故障树分析和常规故障树模糊分析两种方法的优点,工程实用性好。并结合燃气轮机的应用实例,研究了具体的应用方法。 相似文献
3.
4.
为了对风电机组变桨系统的潜在风险进行可靠的动态预测,针对变桨系统部件种类多、系统复杂、故障特征提取困难的问题,文章首先对变桨系统故障点和故障传递过程进行归纳分析,建立故障树;然后将其转化为融合Leaky Noisy-Or节点的动态贝叶斯网络(DBN),保证了模型精度并具备了动态预测能力;最后采用5折交叉验证的方式对模型进行寻优并验证。测试结果表明,该方法在对变桨系统进行风险预测、故障致因分析、风险动态演化过程分析方面准确率较高,可指导变桨系统进行预防性维护,在保证风电机组整体安全方面具有工程应用价值。 相似文献
5.
6.
7.
8.
并行算法的研究已开始进入以并行实现为主的试应用阶段,燃气轮机的稳、动态性能是燃气轮机研制过程中的一个重要环节,本文阐述了国内外并行算法在燃气轮机性能分析中的研究两头并提出了并行算法的应用前。 相似文献
9.
10.
在GTD-350燃气轮机验收试验台上,对监测系统的硬件组成和软件进行设计,介绍了燃气轮机转速、燃油滑油温度、压力、流量等参数的测量系统,并给出一部分实验结果,通过初步研究得出一些负荷变化对燃气轮机动态过程的影响。 相似文献
11.
带中间冷却和回热的燃气轮机动态性能的研究 总被引:2,自引:0,他引:2
对某舰用燃气轮机进行了中间冷却和回热(ICR)的改造设计,采用按比例缩小压气机的方法,使改造设计后的燃气轮机各部件性能达到了良好的匹配.依照模块化建模的原理,建立了换热器等部件模块,在此基础上,在EASY 5仿真平台上搭建了ICR燃气轮机的系统模型,并对其进行了稳态和动态的仿真试验计算.结论认为,舰用燃气轮机改造为ICR燃气轮机,需要重新设计压气机以平衡由于中间冷却器造成的高压压气机入口折合流量降低的影响;ICR燃气轮机具有较高的效率和良好的变工况性能.图5表1参5 相似文献
12.
船舶燃气轮机气水分离器的设计过程复杂,其使用时的外部环境、设计工况和性能要求等方面与普通过滤装置有很大差异。为了更好地完成船舶燃气轮机气水分离器结构设计标准的制定工作,结合船舶实际情况分析了船舶燃气轮机气水分离器在设计时应考虑的分离效率、总压损失、过流速度、海洋环境和机械环境等主要因素;介绍了惯性式滤清器、丝网式滤清器和旋风分离器等结构形式在结构设计标准中应规定的重要结构参数;最后简述了船舶气水分离器的保障性设计,对气水分离器的安全性、稳定性等提出要求。研究结果可为船舶燃气轮机气水分离结构设计标准的制定提供参考。 相似文献
13.
《International Journal of Hydrogen Energy》2014,39(35):20362-20370
An accident modelling approach is used to assess the safety of a hydrogen station as part of a ground transportation network. The method incorporates prevention barriers associated to human factors, management and organizational failures in a risk assessment framework. Failure probabilities of these barriers and end-states events are predicted using Fault Tree Analysis and Event Tree Analysis respectively. Results from the case study considered revealed the capability of the proposed method in estimating the likelihood of various outcomes as well as predicting their future probabilities. In addition, the scheme offers an opportunity to provide dynamic adjustment by updating the failure probability with actual plant data. Results from the analysis can be used to plan maintenance and management of change as required by the plant condition. 相似文献
14.
The perpetual energy production of a wind farm could be accomplished (under proper weather conditions) if no failures occurred. But even the best possible design, manufacturing, and maintenance of a system cannot eliminate the failure possibility. In order to understand and minimize the system failures, the most crucial components of the wind turbines, which are prone to failures, should be identified. Moreover, it is essential to determine and classify the criticality of the system failures according to the impact of these failure events on wind turbine safety. The present study is processing the failure data from a wind farm and uses the Fault Tree Analysis as a baseline for applying the Design Structure Matrix technique to reveal the failure and risk interactions between wind turbine subsystems. Based on the analysis performed and by introducing new importance measures, the “readiness to fail” of a subsystem in conjunction with the “failure riskiness” can determine the “failure criticality.” The value of the failure criticality can define the frame within which interventions could be done. The arising interventions could be applied either to the whole system or could be focused in specified pairs of wind turbine subsystems. In conclusion, the method analyzed in the present research can be effectively applied by the wind turbine manufacturers and the wind farm operators as an operation framework, which can lead to a limited (as possible) design‐out maintenance cost, failures' minimization, and safety maximization for the whole wind turbine system. 相似文献
15.
Yu LEI Gang XU Aibing FANG Chaoqun NIE Weiguang HUANG Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing China 《热科学学报(英文版)》2004,13(4):376-381
The present study focused on the development of a full-scale gas turbine combustor burning syn-gas from the coal-based multi-production. The dynamic features of a variety of parameters of the combustor, such as temperature and pressure during the procedures of startup and thermal load shifting, were measured and analyzed. The frequency and power spectrum of pressure fluctuation were analyzed by applying FFT and 1D continuous MORLET wavelet methods. The results show that the pressure fluctuation has distinct patterns during startup and load-transition procedures. The relationship between these dynamic features and the stability, safety and efficiency of gas turbine combustors burning syn-gas are preliminarily discussed. 相似文献
16.
17.
18.
干式低NOx燃烧技术(DLN)能降低燃气轮机NOx排放.燃烧稳定性监测是进行干式低NOx燃烧调整的基础,而燃烧压力脉动则是反映燃烧稳定性的重要参数.研制了适用于GE公司9F型燃机的多通道燃烧动态压力监测系统,包括动态压力传感器、数据采集卡以及分析软件.现场试验显示,该系统能在线采集燃机燃烧室内多通道的压力脉动,与电厂安装的便携式动态压力监测系统(CDMS)数据进行对比,两者都在频率94、138、217、302 Hz附近存在峰值.该系统为9F型燃机进行DLN燃烧调整提供了真实、可靠的数据支持. 相似文献