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针对安全气囊起爆试验依赖气体发生器的问题,按照国内外安全气囊开发试验法规,采用冷气体压缩替代火药气体发生器的方法,开发了一种安全气囊模拟起爆试验装置。设计了展开装置并采用ANSYS软件对其强度及气密性进行了分析,利用Fluent软件分析了标定装置中密闭容器的形状对压力-时间(p-t)曲线的影响,并基于虚拟仪器技术开发了该试验装置的测控系统。最后,进行了两组不同型号安全气囊的模拟起爆试验,结果表明,该试验装置能迅速准确地展开安全气囊,从而验证了该试验方法的有效性和准确性。 相似文献
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基于有限差分法的MATLAB编程与ANSYS软件中CFX数值仿真计算两种分析方法,分别建立了动压气体轴承的雷诺方程计算模型与几何模型,对比分析了不同偏心率和转速下人字槽径向动压气体轴承的静态性能.结果 表明:两种方法计算结果总体趋势基本一致,但相对MATLAB编程计算,CFX计算得到的承载力较小;二者在计算结果上存在一定偏差. 相似文献
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《机电信息》2015,(27)
为研究不同电极材料下GIS绝缘子表面爬电放电SF6分解组分特性,探索识别不同电极材料的分解气体特征量,笔者在真实的110kV GIS试验平台上,模拟了沿GIS盆式绝缘子表面爬电放电这种典型绝缘缺陷的SF6气体的分解,并用铁和铜两种电极材料做了对比试验,检测了两种电极材料下CO2、CF4、SO2F2、SOF2四种分解气体的含量随时间的变化规律,并研究了两种电极材料下c(SOF2)/c(SO2F2)和c(CF4+CO2)/c(SOF2+SO2F2)两种组分含量比值的特性。结果表明,两种电极材料下c(SOF2)/c(SO2F2)和c(CF4+CO2)/c(SOF2+SO2F2)两种组分含量比值的特性具有明显的不同,因此,可将SF6分解气体的含量比值作为识别GIS绝缘子表面爬电放电两种电极材料的特征量。 相似文献
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根据我们国家目前城市变压器运行情况,对光声光谱技术在变压器油中溶解气体检测的应用进行了研究,对试验的机理和数据惯性进行了探索论证。建立了光声光谱法的试验系统模型,并确定了采用的光声腔和光源,研究了氢气组分的检测方法。对不同组分含量的气体进行了试验,并与气体色谱法试验获得的结果进行了对比,认为光声光谱法用于变压器油中气体检测是可行的。 相似文献
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对气体管道泄漏孔处声源进行了声发射检测试验,分析了气体泄漏产生声发射的原因,通过对不同泄漏孔直径、不同泄漏内压情况下的声发射信号处理与分析,得出气体管道泄漏声源的频率范围及幅度随管道内部压力、泄漏孔径的变化影响规律,并与管道气体泄漏的数值模拟结果进行了对比分析,试验研究结果为气体管道泄漏声发射检测提供依据。 相似文献
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用与设计气体相同或相近似的代用气体进行试验来预测性能是离心压缩机理论和实践的重要课题之一。本文主要根据通用机械研究所在500kw闭式试验装置上,采用天然气离心压缩机的双级模型,分别对四种不同工质进行试验研究。对其结果,结合有关资料分析,在选择代用气体和确定当量转速方面得到了一些结论。文中还给出了性能预测经验公式,以供有关人员参考。 相似文献
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张烨 《机电产品开发与创新》2012,25(5):149-150,146
论文主要描述了金属材料拉伸试验的两种不同试验速率方法对试验结果的影响,从今后的试验方法发展趋势上对于试验机的要求作了阐述,介绍了先进的试验机控制系统。 相似文献
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For cavity volume testing, conventional optical or acoustic direct test methods are not only limited in terms of measurement efficiency, but also have difficulty avoiding errors due to complex cavity structures. In this paper, we present a cavity volume test based on micropressure differential gas inflation and deflation. The principle of the method is to charge and deflate the test cavity and obtain a mapping between the microbe difference and the inflating flow rate. Variability curves of the pressure difference inside and outside the cavity are measured during the deflating process and the cavity volume is calculated using parameters such as the intake flow rate and differential pressure. The heat and mass transfer equations are formulated for the gas in the cavity under inflation and deflation conditions. Numerical simulations of the variability of the gas state parameters and their impact factors are performed to verify the feasibility of the volumetric measurements. An experimental setup for volume measurements is constructed and a cockpit is used as an application object for volume measurement experiments under different micropressure differential inflation and deflation conditions. It shown that, as a complement to geometrical physical measurements, this method can better characterize the gas volume of the cavity. 相似文献
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中国采用计算机控制技术进行气瓶水压试验装置已逐步投入使用,计算机控制的水压试验与传统的人工水压试验相比较具有效率高,精度高的特点。本文将介绍计算机控制气瓶外测法水压试验装置设计、试验压力和试验排水量测定的控制方法,讨论了气瓶外测法试验装置的状态监测方法。 相似文献
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R. A. Sadrtdinov V. G. Rybalko D. V. Novgorodov 《Russian Journal of Nondestructive Testing》2013,49(3):164-169
This paper is devoted to the problems of increasing the reliability of industrial pipelines of compressor stations (CSs) that are subjected to bending loads. The results of the bending load simulation at a tube test bench are presented and variations in the stressed state under load are analyzed. Practical methods for reducing and testing bending stresses in pipelines are considered in the second part for different designs of gas transporting apparatuses. 相似文献
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杨明军 《机械制造与自动化》2011,(3):108-109,147
设计了适用于实验室终检台和生产线终检台的燃气用具检测设备嵌入式软件,分别使用凌华PCI-9221采集卡和西门子S7-200系列模块采集各种信号,同时结合行业检测标准编制测试流程,最终用于燃气用具的各项性能指标检测.该系统的应用可显著提高测试的效率以及自动化程度,还能减少一些人为误操作. 相似文献
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《Flow Measurement and Instrumentation》2006,17(4):247-254
The paper describes the testing of the Wafer V-Cone meters in accordance with the new API 5.7 “Testing Protocol for Differential Pressure Flow Measurement Devices” in the Colorado test facility. The use of this new API standard and some of the points which had to be addressed in order to implement the standard are discussed. The results of the testing of 2″ and 4″ Wafer V-Cone meters in water and in gas are given. The non-standard testing requirements in the standard will provide evidence of the conditioning effect of the V-Cone as it meters the fluid. The conclusions reached were: API 5.7 tests the claims of the meter manufacturer regarding the product in a demanding manner. As the procedure is implemented the need to make amendments will become apparent and this paper will address some of the limitations which became evident while testing. The results of the Wafer V-Cone testing uncertainty will be discussed. 相似文献
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Dieter Klaffke 《Lubrication Science》2000,6(4):373-385
Tribology is an experiment‐oriented branch of a complex, interdisciplinary science, in which testing plays a major role in the solution of technical problems, in the field as well as in the development of tribomaterials. Various test methods are used for this purpose, and the results are sensitive to the choice of test method and test conditions. In this paper, the effects of test parameters on friction and wear results are considered, some selected results of model tests with different types of materials are presented, and guidelines are derived, that help improve the reliability and level of confidence of tribological tests performed in laboratories. 相似文献