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Damage accumulation comparison for various vibration test profile generation methods applied to a complex payload
Journal of Vibration and Control ( IF 2.3 ) Pub Date : 2021-04-28 , DOI: 10.1177/10775463211010535
Mark Warren 1 , Keith F Joiner 2 , Murat Tahtali 3
Affiliation  

There are potential sources of uncertainty when using default or generic profiles for vibration testing, particularly for large and complex payloads (Warren and Joiner, 2019). Replacing these severities with custom profiles generated using measured data offers one alternative; however, care must be taken not to select an inappropriate or inaccurate method. This research details the methodology and results of a trial which involved the design and implementation of a series of vibration tests, each to simulate a mixed-terrain environment applied to a complex payload. A systematic approach was used to develop and execute a test plan via the design of experiments method. An estimate of the damage potential for each was formed using Miner’s rule (linear damage accumulation) applied to direct strain gauge data. This approach was compared with damage measured during a time waveform replication style test to be used as a baseline. The results of this test can be used to guide test specifiers and programme-level acceptance test guidelines and may be useful in implementing or guiding standards in this space. In addition, the damage measured in a series of increasing amplitude vibration tests (with an identical power spectral density) was compared with predicted values to assess the gain linearity assumptions often used in accelerated vibration testing. The research is unique as the authors could not source a thorough trial comparing the damage produced using a range of different profile development methods with a complex, real-world payload. Test houses and test specifiers seeking to improve the accuracy of their tests should consider the key findings and guidance in this article.



中文翻译:

适用于复杂有效载荷的各种振动测试轮廓生成方法的损伤累积比较

使用默认配置文件或通用配置文件进行振动测试时,尤其是对于大型和复杂的有效载荷,可能存在不确定性(Warren和Joiner,2019年)。用使用测量数据生成的自定义配置文件代替这些严重性提供了一种选择。但是,必须注意不要选择不合适或不正确的方法。这项研究详细介绍了试验的方法和结果,该试验涉及一系列振动测试的设计和实施,每个振动测试都是为了模拟应用于复杂有效载荷的混合地形环境。通过设计实验方法,采用了系统的方法来制定和执行测试计划。使用适用于直接应变仪数据的Miner规则(线性损伤累积)来估算每种损伤的可能性。将这种方法与在时间波形复制样式测试中测得的损坏进行比较,以用作基准。该测试的结果可用于指导测试说明者和程序级别的验收测试指南,并且可能有助于实施或指导该领域的标准。此外,将在一系列振幅增加的振动测试(具有相同的功率谱密度)中测得的损伤与预测值进行比较,以评估加速振动测试中经常使用的增益线性假设。这项研究是独特的,因为作者无法进行全面的试验,将使用各种不同的轮廓开发方法和复杂的真实有效载荷所产生的损害进行比较。

更新日期:2021-04-30
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