• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Structural integrity investigation of the AN/FPS-117 radar and radar tower.
【24h】

Structural integrity investigation of the AN/FPS-117 radar and radar tower.

机译：AN / FPS-117雷达和雷达塔的结构完整性调查。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The purpose of this research is to verify the structural integrity of the AN/FPS-117 Long Range Radar and radar tower. An investigation is performed to understand how the fluctuating loads have an impact on the nucleation of crack-like discontinuities and the service life of the components and what steps should be taken as a result of the analysis. It is hypothesized that the rotation of the radar, in conjunction with the variation in level of the platform, creates fluctuating loads in support members that will decrease the life and reliability of these and other radar components.;An analysis is conducted of the changes in stress and strain amplitudes on the structure due to the rotation of the radar. Based on the material type, fatigue properties were determined and a strain-life curve was constructed to approximate the number of cycles to failure.;The resulting strain amplitude from the fluctuation of loads was found to be relatively small compared to the strain-life curve. The change in radar level did not have a significant impact on the strain amplitude and calculated cycles to failure based on strain gage measurements.;A damage tolerance assessment was completed to estimate the crack growth rate of the cracks found in the radar support plate. The results from this analysis were compared with a failure analysis that was performed on the radar support plate.;A nondestructive inspection of the structure was performed and multiple crack-like indications were found. The results from these inspections are shown. They document a representative sampling of the cracks that were found on the radar and tower structure. A holistic, damage-tolerant type approach will be taken to determine the residual life of the radar system.;The results from the fatigue analyses will provide inspection recommendations to be implemented to limit the probability of failure to within an allowable amount. It is recommended that the structure be continually inspected for fatigue cracks and a holistic approach be implemented in order to evaluate additional potential failure modes and mitigate the risk of a catastrophic structural failure.
机译：本研究的目的是验证AN / FPS-117远程雷达和雷达塔的结构完整性。进行调查以了解波动载荷如何影响裂纹状间断的形核和组件的使用寿命以及分析结果应采取的步骤。假设雷达的旋转以及平台高度的变化会在支撑构件中产生波动的载荷，这将缩短这些构件和其他雷达构件的寿命和可靠性。由于雷达的旋转，结构上的应力和应变幅度。根据材料类型确定疲劳性能，并构建应变寿命曲线以近似失效的次数。;与载荷寿命曲线相比，载荷波动产生的应变幅度相对较小。雷达水平的变化对应变幅值和基于应变计测量得出的失效周期没有显着影响。完成了损伤容限评估，以估计在雷达支撑板上发现的裂纹的裂纹增长率。将分析的结果与在雷达支撑板上进行的失效分析进行比较。;对结构进行了无损检查，发现了多个类似裂纹的迹象。显示了这些检查的结果。他们记录了在雷达和塔架结构上发现的代表性裂缝样本。将采用整体的，耐损伤的方法来确定雷达系统的剩余寿命。疲劳分析的结果将提供检查建议，以将故障概率限制在允许的范围内。建议连续检查结构的疲劳裂纹，并采取整体方法以评估其他潜在的失效模式并减轻灾难性结构失效的风险。

著录项

  • 作者

    Parker, David Parel.;

  • 作者单位

    The University of Utah.;

  • 授予单位 The University of Utah.;
  • 学科 Engineering Mechanical.
  • 学位 M.S.
  • 年度 2014
  • 页码 160 p.
  • 总页数 160
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号