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机载设备的噪声环境试验研究 总被引:4,自引:3,他引:1
介绍了标准中所规定的试验载荷的计算方法,2种噪声试验装置——高声强混响室和高声强行波管,以及高声强试验系统和测试系统的组成。以GJB 150.86—17的图1声谱为基准,开展了机载设备的噪声环境试验研究,对噪声试验中试验夹具的设计和制造、试验样品的安装、试验前的检查和试验程序进行了说明,采用了开环和闭环方式控制声场,试验结果达到了国军标的要求。 相似文献
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仪器设备管理工作是非常重要的基础性工作,只有实施从购置、验收、量值溯源、使用、维护、修理、报废等具体、规范、有效的管理,才能确保环境检测机构检测结果的准确可靠。 相似文献
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金栋 《安全.健康和环境》2009,9(7):17-19,34
通过对常减压装置内介质温度和自燃点的比较分析,绘制装置自燃危险分析图,确定自燃危险的重点防护区,并提出对策措施。 相似文献
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Introduction: The appearance of musculoskeletal disorders (MDs) in professional drivers due to exposition to whole-body vibration (WBV) makes it relevant to assess this exposure. The European Directive 2002/44/EC has two methods to evaluate exposure to WBV (defined in ISO2631-1:2008). These methods evaluate the exposure associated with an 8-hour working day; however, MDs due to WBV could also be caused by accumulated exposure to vibrations over long term, and hence, the methods defined in the European directive may be limited in their ability to ensure the safety of workers exposed to WBV throughout their years of employment. Method: A detailed comparison and discussion of methods defined in the European Directive and the ISO2631-5:2018 was used as a starting point of the main results of this paper. On this basis, a new methodology for the management and organization of preventive measures is proposed to consider the assessment of ISO2631-5:2018 standard and the full working life of workers. Experimental data to assess exposure to WBV in heavy equipment vehicle (HEV) drivers under different road surface conditions and range of velocities were considered to illustrate the process of the proposed methodology. Results: The methods defined in the standards provide different assessments leading to a different possible consideration of safe operations when the risks associated with them may actually be high. The proposed methodology can be used with the aim of ensuring safety of workers throughout their working lives and providing an easy implementation of the calculations of ISO2631-5:2018 standard. Conclusions: A procedure to assess the health risk probability to which the HEV worker is exposed in terms of the exposure years and a different range of operational vehicle speeds is proposed and exemplified with a study case. Practical applications: This study provides a practical tool for the management of WBV exposure related to work-tasks in HEV drivers. Safety managers should consider the global exposition to WBV throughout their working life, and this research provides an easy tool to accomplish it. 相似文献
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Introduction: The phenomenon that construction workers do not use personal protective equipment (PPE) is a major reason for the high occurrence frequency of accidents in the construction industry. However, little efforts have been made to quantitatively examine the factors influencing construction workers’ acceptance of PPE. Method: In the current study, a PPE acceptance model for construction workers (PAMCW) was proposed to address the noted need. The PAMCW incorporates the technology acceptance model, theory of planned behavior, risk perception, and safety climate for explaining construction worker acceptance of PPE. 413 construction workers participated in this study to fill out a structured questionnaire. The PAMCW was analyzed using structural equation modeling. Results: Results provide evidence of the applicability of the technology acceptance model and theory of planned behavior to the PPE acceptance among construction workers. The positive influence of safety climate and risk perception-severity on attitude toward using PPE was significant. Safety climate positively influences perceived usefulness. Risk perception-worry and unsafe was found to positively affect intention to use PPE. Practical Applications: Practical suggestions for increasing construction workers’ use of PPE are also discussed. 相似文献
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加氢反应器等高温临氢设备由于长期在高温高压含氢或氢与硫化氢环境下服役,可能会出现高温氢腐蚀(HTHA)、氢脆等损伤现象,直接关系到装置的长期稳定可靠运行。为了防止出现氢损伤现象,多采用奥氏体不锈钢单层或多层堆焊技术。针对RBI技术中HTHA模块对于含堆焊层结构的临氢设备在评估时并未考虑堆焊层的影响,从氢扩散理论出发,考虑堆焊层的影响,提出采用有效氢分压的方法开展HTHA敏感性Pv因子的计算,并改进了E347+E309L双层堆焊层结构的临界Pv修正因子。 相似文献
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根据我国轨道交通设备安全管理的需求,提出基于互联网+的轨道交通动力设备安全管理系统平台的框架,运用J2EE开发工具,采用嵌入式高速数据采集技术、故障诊断技术,构建形成集成化、网络化和信息化的轨道交通动力设备安全管理系统。完善智能的设备安全管理系统,能有效提高轨道交通动力设备的安全监管力度,保障设备安全。 相似文献