研究目的:随着我国"一带一路"倡议的实施,国内企业在海外承担的铁路设计和建设项目越来越多。在国外项目中,由于历史原因,很多国家的轨距及限界均不统一,通常采用的限界标准有国际铁路联盟UIC标准、欧盟EN标准、英国BS标准等...研究目的:随着我国"一带一路"倡议的实施,国内企业在海外承担的铁路设计和建设项目越来越多。在国外项目中,由于历史原因,很多国家的轨距及限界均不统一,通常采用的限界标准有国际铁路联盟UIC标准、欧盟EN标准、英国BS标准等,其中BS EN 15273限界标准应用较为广泛。该标准的研究在国内的应用成果不多,本文旨在介绍该标准的基本原理和在铁路工程设计中的应用方法。研究结论:(1)应用范围:适用于新建铁路和改建铁路,不适用于自动导向交通和独轨交通;(2)限界分类:根据限界计算原则和适用范围的不同,分为静态限界、动态限界和动力学限界三种;(3)本文研究可供设计人员在采用BS EN 15273标准的海外铁路工程项目中开展限界设计时参考。展开更多
碳酸盐含量检测是填海项目质量控制的重要指标,填料中的碳酸盐含量超标会影响填海后土地的强度和稳定性以及建筑物的耐久性。本次研发依托境外某大型填海工程的大量测试任务,研发了通过测量酸-盐反应后产生二氧化碳气体的体积而测定碳...碳酸盐含量检测是填海项目质量控制的重要指标,填料中的碳酸盐含量超标会影响填海后土地的强度和稳定性以及建筑物的耐久性。本次研发依托境外某大型填海工程的大量测试任务,研发了通过测量酸-盐反应后产生二氧化碳气体的体积而测定碳酸盐含量的高效五联碳酸盐含量测试仪,包括其工作原理、设计思路、性能指标、仪器测试步骤、数据计算及质量控制等。通过对填料的测试结果分析,研发的五联碳酸盐含量测试仪达到了适用英国标准BS EN IOS 10693:2014的测试标准,测试适用范围广,结果精确度高,单组测试所需时间减少30%~50%,测试效率高的目的,并取得了良好的实用效果。展开更多
Aerospace manufacturing SMEs are continuously facing the challenge on managing their supply chain and complying with the aerospace manufacturing quality standard requirement due to their lack of resources and the natu...Aerospace manufacturing SMEs are continuously facing the challenge on managing their supply chain and complying with the aerospace manufacturing quality standard requirement due to their lack of resources and the nature of business. In this paper, the ERP system based approach is presented to quality control and assurance work in light of seamless integration of in-process production data and information internally and therefore managing suppliers more effectively and efficiently. The Aerospace Manufacturing Quality Assurance Standard (BS/EN9100) is one of the most recognised and essential protocols for developing the industry-operated-and-driven quality assurance systems. The research investigates using the ERP based system as an enabler to implement BS/EN9100 quality management system at manufacturing SMEs and the associated implementation and application perspectives. An application case study on a manufacturing SME is presented by using the SAP based implementation, which helps fiarther evaluate and validate the approach and application system development.展开更多
The solution we propose optimizes the energy inside the wireless sensor network (WSN) with higher performance. The WSN is composed of many sensors nodes which collect the information, treat that information then send ...The solution we propose optimizes the energy inside the wireless sensor network (WSN) with higher performance. The WSN is composed of many sensors nodes which collect the information, treat that information then send it to the base station. The information is received by the base station (BS) then data?are?sent to the users by that BS. The most important element in sensor node is energy, as the lifetime of wireless sensor network depends on the sensor node energy. So many researches had been made in order to improve this energy basing routing protocols. As a result, we are able to propose a solution that optimizes this energy. In this paper, we are presenting a new approach of selecting node sensor base on routing protocol and process to send data to the base station. This ameliorates wireless sensor network lifetime and increases?the transmission sensor node to base station.展开更多
基于BS EN 61373:2010标准对轨道车辆底架吊装接线箱进行随机振动疲劳寿命以及冲击强度分析.首先利用ANSYS对接线箱进行PSD随机振动计算,结合迈纳尔(Miner)累积损伤理论以及Stein-berg提出的高斯三区间法,对接线箱随机振动疲劳寿命进行...基于BS EN 61373:2010标准对轨道车辆底架吊装接线箱进行随机振动疲劳寿命以及冲击强度分析.首先利用ANSYS对接线箱进行PSD随机振动计算,结合迈纳尔(Miner)累积损伤理论以及Stein-berg提出的高斯三区间法,对接线箱随机振动疲劳寿命进行评估.然后通过ANSYS对接线箱进行瞬态动力学分析,验证其冲击强度能够满足设计需求.并探讨了Rayleigh阻尼系数对接线箱冲击特性的影响,为以后轨道车辆底架吊装结构冲击强度分析提供了参考.展开更多
介绍了澳大利亚于2009年颁布的AS 7509.1《铁路机车车辆—动力学性能—第1部分:机车车辆》中机车车辆在扭曲测试轨上脱轨安全性测量方法,在SIMPACK软件中模拟AS 7509.1标准中的实验扭曲轨道条件,进行车辆脱轨安全性计算方法。与欧洲在2...介绍了澳大利亚于2009年颁布的AS 7509.1《铁路机车车辆—动力学性能—第1部分:机车车辆》中机车车辆在扭曲测试轨上脱轨安全性测量方法,在SIMPACK软件中模拟AS 7509.1标准中的实验扭曲轨道条件,进行车辆脱轨安全性计算方法。与欧洲在2005年颁布的BS EN 14363《铁路设施—铁路车辆运行特性的验收试验—运行性能试验和稳定性试验》中计算机仿真评价机车车辆低速抗爬轨能力方法进行比较分析得出,AS 7509.1标准比BS EN 14363标准验证车辆适应轨道扭曲能力的计算方法更可靠,适用性更广。展开更多
随着装配式建筑的推广,辐射顶板作为一种新型空调末端正逐渐被应用到越来越到的港口工程中。目前国内针对辐射顶板传热量的计算方法尚没有对应的技术规范或行业标准。本文通过对美标ASHRAE Handbook、德标DIN EN 14240和英标BS EN 1264...随着装配式建筑的推广,辐射顶板作为一种新型空调末端正逐渐被应用到越来越到的港口工程中。目前国内针对辐射顶板传热量的计算方法尚没有对应的技术规范或行业标准。本文通过对美标ASHRAE Handbook、德标DIN EN 14240和英标BS EN 1264中相关规定的解读,对辐射顶板传热量的计算方法进行介绍。展开更多
针对小截面导体B_(1)级和B2_(ca)级无卤低烟阻燃电缆,分别按照现行国家标准GB/T 31248—2014 《电缆或光缆在受火条件下火焰蔓延、热释放和产烟特性的试验方法》与欧盟标准BS EN 50399:2011+A1:2016进行试验。通过试验过程和试验结果的...针对小截面导体B_(1)级和B2_(ca)级无卤低烟阻燃电缆,分别按照现行国家标准GB/T 31248—2014 《电缆或光缆在受火条件下火焰蔓延、热释放和产烟特性的试验方法》与欧盟标准BS EN 50399:2011+A1:2016进行试验。通过试验过程和试验结果的对比分析,探讨试样安装对试验结果的影响。对比结果可使广大企业在B_(1)级和B2_(ca)级无卤低烟阻燃电缆开发过程中少走弯路,同时提出现行国家标准GB 31247—2014《电缆及光缆燃烧性能分级》修订的必要性,有助于解决此类线缆的国际贸易争端。展开更多
文摘研究目的:随着我国"一带一路"倡议的实施,国内企业在海外承担的铁路设计和建设项目越来越多。在国外项目中,由于历史原因,很多国家的轨距及限界均不统一,通常采用的限界标准有国际铁路联盟UIC标准、欧盟EN标准、英国BS标准等,其中BS EN 15273限界标准应用较为广泛。该标准的研究在国内的应用成果不多,本文旨在介绍该标准的基本原理和在铁路工程设计中的应用方法。研究结论:(1)应用范围:适用于新建铁路和改建铁路,不适用于自动导向交通和独轨交通;(2)限界分类:根据限界计算原则和适用范围的不同,分为静态限界、动态限界和动力学限界三种;(3)本文研究可供设计人员在采用BS EN 15273标准的海外铁路工程项目中开展限界设计时参考。
文摘碳酸盐含量检测是填海项目质量控制的重要指标,填料中的碳酸盐含量超标会影响填海后土地的强度和稳定性以及建筑物的耐久性。本次研发依托境外某大型填海工程的大量测试任务,研发了通过测量酸-盐反应后产生二氧化碳气体的体积而测定碳酸盐含量的高效五联碳酸盐含量测试仪,包括其工作原理、设计思路、性能指标、仪器测试步骤、数据计算及质量控制等。通过对填料的测试结果分析,研发的五联碳酸盐含量测试仪达到了适用英国标准BS EN IOS 10693:2014的测试标准,测试适用范围广,结果精确度高,单组测试所需时间减少30%~50%,测试效率高的目的,并取得了良好的实用效果。
基金support for this research (R85169) from Mollart Engineering Ltd
文摘Aerospace manufacturing SMEs are continuously facing the challenge on managing their supply chain and complying with the aerospace manufacturing quality standard requirement due to their lack of resources and the nature of business. In this paper, the ERP system based approach is presented to quality control and assurance work in light of seamless integration of in-process production data and information internally and therefore managing suppliers more effectively and efficiently. The Aerospace Manufacturing Quality Assurance Standard (BS/EN9100) is one of the most recognised and essential protocols for developing the industry-operated-and-driven quality assurance systems. The research investigates using the ERP based system as an enabler to implement BS/EN9100 quality management system at manufacturing SMEs and the associated implementation and application perspectives. An application case study on a manufacturing SME is presented by using the SAP based implementation, which helps fiarther evaluate and validate the approach and application system development.
文摘The solution we propose optimizes the energy inside the wireless sensor network (WSN) with higher performance. The WSN is composed of many sensors nodes which collect the information, treat that information then send it to the base station. The information is received by the base station (BS) then data?are?sent to the users by that BS. The most important element in sensor node is energy, as the lifetime of wireless sensor network depends on the sensor node energy. So many researches had been made in order to improve this energy basing routing protocols. As a result, we are able to propose a solution that optimizes this energy. In this paper, we are presenting a new approach of selecting node sensor base on routing protocol and process to send data to the base station. This ameliorates wireless sensor network lifetime and increases?the transmission sensor node to base station.
文摘基于BS EN 61373:2010标准对轨道车辆底架吊装接线箱进行随机振动疲劳寿命以及冲击强度分析.首先利用ANSYS对接线箱进行PSD随机振动计算,结合迈纳尔(Miner)累积损伤理论以及Stein-berg提出的高斯三区间法,对接线箱随机振动疲劳寿命进行评估.然后通过ANSYS对接线箱进行瞬态动力学分析,验证其冲击强度能够满足设计需求.并探讨了Rayleigh阻尼系数对接线箱冲击特性的影响,为以后轨道车辆底架吊装结构冲击强度分析提供了参考.
文摘介绍了澳大利亚于2009年颁布的AS 7509.1《铁路机车车辆—动力学性能—第1部分:机车车辆》中机车车辆在扭曲测试轨上脱轨安全性测量方法,在SIMPACK软件中模拟AS 7509.1标准中的实验扭曲轨道条件,进行车辆脱轨安全性计算方法。与欧洲在2005年颁布的BS EN 14363《铁路设施—铁路车辆运行特性的验收试验—运行性能试验和稳定性试验》中计算机仿真评价机车车辆低速抗爬轨能力方法进行比较分析得出,AS 7509.1标准比BS EN 14363标准验证车辆适应轨道扭曲能力的计算方法更可靠,适用性更广。
文摘随着装配式建筑的推广,辐射顶板作为一种新型空调末端正逐渐被应用到越来越到的港口工程中。目前国内针对辐射顶板传热量的计算方法尚没有对应的技术规范或行业标准。本文通过对美标ASHRAE Handbook、德标DIN EN 14240和英标BS EN 1264中相关规定的解读,对辐射顶板传热量的计算方法进行介绍。