共查询到11条相似文献,搜索用时 46 毫秒
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Rubber and fluid-filled rubber engine mounts are commonly used in automotive and aerospace applications to provide reduced cabin noise and vibration, and/or motion accommodations. In certain applications, the rubber mount may operate at frequencies as high as 5000 Hz. Therefore, dynamic stiffness of the mount needs to be known in this frequency range. Commercial high frequency test machines are practically nonexistent, and the best high frequency test machine on the market is only capable of frequencies as high as 1000 Hz. In this paper, a high frequency test machine is described that allows test engineers to study the high frequency performance of rubber mounts at frequencies up to 5000 Hz. 相似文献
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浙大中药指纹图谱相似度计算软件在烟用香精香料色谱分析中的引入应用 总被引:1,自引:0,他引:1
系统地介绍浙大中药指纹图谱相似度计算软件五个基本功能:1.数据导入,2.数据预处理和色谱图的缩放比较,3.保留时间校正和谱峰自动匹配,4.指纹图谱相似度计算,5.结果输出和报表打印。浙大中药指纹图谱相似度计算软件为一种简便易学的软件系统,就其操作中的关键问题给予图文结合的方式加以详细说明。通过香精色谱分析的例子,对峰点的校正匹配与整体相似度计算等其它功能作进行详细讲解。 相似文献
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多年来,辊简机头设备一直用于生产橡胶制品的胶片和胶板,典型的终端产品包括胶片制品、容器衬里输送带、三角带、印刷胶板、磨损防护板、预硫化制品鞋底、空气弹簧等等,对于这些生产过程,几乎没有使用标准设备,取而代之的是,必须为满足用户需要而专门设计辊筒机头设备。 相似文献
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The friction and wear behaviour of self-mated couples of MgO---ZrO2, Al2O3 and two types of SiSiC were studied under dry sliding conditions in a special pin-on-disc high temperature tribometer. The temperature was varied between 25 and 1000°C, and the sliding speed from 0.03 m s−1 to 3 m s−1. The morphology of the worn surfaces was studied by means of SEM, and their phase distribution by X-ray diffraction and TEM analyses. The results show that the wear coefficients of all couples mostly increase with increasing temperature and sliding velocity. The wear of MgO---ZrO2 is influenced by tribo-induced phase transformations while α-Al2O3 retains its original structure for all test conditions. For SiSiC delamination and fatigue of the interface Si/ß-SiC predominate. At higher temperatures and sliding velocities tribo-oxidation is effective. The friction coefficients lie between 0.5 and 1.0 under steady-state conditions but for short test durations lower values can occur. The couple SiSiC/SiSiC has low friction coefficients at low sliding velocities and temperatures, even if the steady-state region is reached. 相似文献
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近日,全国橡塑机械信息中心主任一行走访了内蒙古宏立达橡塑机械有限责任公司.董事长王绁宏先生介绍,公司前身是成立于1954年的呼和浩特橡塑机械总厂,近些年公司稳抓稳打、步步为营,逐步完善了公司的改制及各项业务,形成了国内挤出机生产规格最齐全、形式最多样、工控技术先进的有利局面,并将公司发展目标设计定为2015年挤入国内橡机行业综合实力前列。 相似文献