振动作用下悬臂梁谐振频移对失效时间的影响

Q4 Engineering

Journal of the IEST Pub Date : 2010-04-12 DOI:10.17764/JIET.53.1.167M8136U6514056

M. Paulus, K. Doughty

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引用次数: 6

摘要

许多振动筛分方案已经实施了重复冲击(RS)机的使用。对RS功率谱密度(PSD)的检查表明，在整个频带中存在许多高点和低点。这些尖峰和低谷对测试项目失败时间的影响是未知的。一个简单的悬臂梁受到几个振动剖面的波峰和谷。结果表明，在裂纹扩展过程中，由于梁的共振位移，波峰和波谷对失效时间有显著影响。

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Effect of Resonant Frequency Shifting on Time to Failure of a Cantilevered Beam under Vibration

Many vibration screening programs have implemented the use of repetitive shock (RS) machines. Examination of the RS power spectral density (PSD) shows there are many high and low points throughout the frequency band. The effect of these sharp peaks and valleys on the time to failure of a test item was unknown. A simple cantilevered beam was subjected to several vibration profiles with peaks and valleys. It was determined that the peaks and valleys had a significant effect on the time to failure due to resonant shifting of the beam during crack propagation.

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来源期刊

Journal of the IEST Engineering-Safety, Risk, Reliability and Quality

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The Journal of the IEST is an official publication of the Institute of Environmental Sciences and Technology and is of archival quality and noncommercial in nature. It was established to advance knowledge through technical articles selected by peer review, and has been published for over 50 years as a benefit to IEST members and the technical community at large as as a permanent record of progress in the science and technology of the environmental sciences