Fatigue Life Analysis of Butterfly Laser Pin under Vibration

LI Chang-an; QUAN Ben-qing; GUAN Wei-lin; YANG Ming-dong

doi:10.13756/j.gtxyj.2021.01.010

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Fatigue Life Analysis of Butterfly Laser Pin under Vibration

- Fatigue Life Analysis of Butterfly Laser Pin under Vibration
- Study on Optical Communications Issue 1, Pages: 49-51(2021)
- 作者机构：
  
  武汉光迅科技股份有限公司，武汉　430205
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2021.01.010
  CLC： O302
- Published：10 February 2021，
  
  Received：22 September 2020，
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LI Chang-an, QUAN Ben-qing, GUAN Wei-lin, et al. Fatigue Life Analysis of Butterfly Laser Pin under Vibration. [J]. Study on Optical Communications (1):49-51(2021)
DOI：

LI Chang-an, QUAN Ben-qing, GUAN Wei-lin, et al. Fatigue Life Analysis of Butterfly Laser Pin under Vibration. [J]. Study on Optical Communications (1):49-51(2021) DOI： 10.13756/j.gtxyj.2021.01.010.

摘要

针对用引线连接的蝶形激光器管脚在扫频振动测试中发生齐根断裂的问题，文章建立了有限元分析模型，模型中用不同管脚长度反映引线的影响，采用模态叠加法分析了管脚在20 g、20~2 000 Hz正弦扫频振动下的应力。基于Miner准则，计算了管脚在振动条件下的寿命。分析结果表明：（1）原激光器管脚的固有频率高于2 000 Hz，连接引线后，固有频率降低到2 000 Hz以内，在振动条件下会发生共振；适当位置固定引线，可将其固有频率提高到2 000 Hz以上，从而避免共振；（2）原激光器管脚在振动条件下为无限寿命，用引线连接后的激光器管脚寿命大幅降低，在适当位置固定引线可以将管脚寿命提高到无限寿命。

Abstract

In order to solve the problem that the pin of butterfly laser connected with lead wire breaks in the sweep frequency vibration test

the finite element analysis model is established with different pin length to reflect the influence of lead wire. The stress of the pin is analyzed by mode superposition method under the condition of 20 g and 20~2 000 Hz sinusoidal sweep frequency vibration. Based on Miner criterion

the life of pin under vibration is calculated. The analysis results show that the natural frequency of the original laser pin is higher than 2 000 Hz. After connecting to the lead wire

the natural frequency will be reduced to less than 2 000 Hz

and the resonance will occur under the vibration condition. It is also shown that if the lead wire is fixed appropriately

the natural frequency can be increased to more than 2 000 Hz to avoid resonance. Moreover

the results indicate that the original laser pin has infinite life under vibration condition

but the life of the pin connected by lead wire is greatly reduced. The pin life can be increased to infinite life by fixing the lead wire appropriately.

关键词

蝶形激光器管脚疲劳寿命有限元法

Keywords

butterfly laserpinfatigue lifefinite element method

references

代锋, 唐德效, 石敏.星载电子设备元器件随机振动疲劳分析[J].空间电子技术, 2011, 8(1): 76-80.

徐文正, 任超, 罗成, 等.带引脚表贴器件互联疲劳寿命的有限元分析[J].电子元件与材料, 2014(12): 98-102.

Hu J M. Sinusoidal Vibration Tests for Product Durability Validation European, EP0864080B1[P], 2002-07-03.

Steinberg D S. Vibration Analysis for Electronic Equipment[M]. New York: John Wiley & Sons, 2000.

Miner M A. Cumulative Damage in Fatigue[J]. Journal of Applied Mechanics, 1945, 12(3): 159-164.

朱秋菊, 张开创, 潘自民, 等.宇航单机元器件随机振动疲劳失效分析[J].数字技术与应用.2019(12): 202-203.

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