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In order to solve the problem of the accuracy of the random vibration transmissibility calculation of airborne electronic equipment, the basic STEINBERG sinusoidal vibration transmissibility model and the IRVINE random vibration transmissibility model were firstly verified through tests, and it was found that there was room for improvement in the accuracy of the IRVINE random vibration transmissibility model. Therefore, on the basis of the "Three-interval method", the effects of 4σ and 5σ transient acceleration of random vibration were taken into consideration, and a more comprehensive"Five-interval method" was proposed; then, the structural fatigue coefficients of the model were corrected by combining with the characteristics of the airborne electronic equipments. The results show that the error between the proposed random vibration transmissibility calculation model and the measured value is less than 5%, which is closer to the measured value,proving that the proposed model is more accurate.
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为解决机载电子设备随机振动传递率计算准确度问题,首先,通过试验验证了STEINBERG正弦振动传递率基本模型和IRVINE随机振动传递率基本模型,发现IRVINE随机振动传递率模型的准确度有改进的空间。因此,在“三段法”的基础上将随机振动4σ、5σ瞬时加速度的影响综合考虑,提出更全面的“五段法”;然后,结合机载电子设备特点,修正了模型的结构疲劳系数。结果表明,所提随机振动传递率计算模型与实测值的误差小于5%,更逼近实测值,证明所提模型更准确。
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刘治虎,男,1984年生,陕西西安人,硕士,高级工程师;主要研究方向为电子设备耐恶劣振动环境结构设计;E-mail:huanzhinan2004@163.com。
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刘治虎,男,1984年生,陕西西安人,硕士,高级工程师;主要研究方向为电子设备耐恶劣振动环境结构设计;E-mail:huanzhinan2004@163.com。
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Structure of the typical airborne electronic equipmen, figureFileSmall=39m8XzBqYEq1Vaf8i1HS9w==, figureFileBig=UyTNpm4ZQ7PYv86JbKLnqQ==, tableContent=null), ArticleFig(id=1240594169836654925, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=图1, caption=
典型机载电子设备结构, figureFileSmall=39m8XzBqYEq1Vaf8i1HS9w==, figureFileBig=UyTNpm4ZQ7PYv86JbKLnqQ==, tableContent=null), ArticleFig(id=1240594170046370136, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=EN, label=Fig.2, caption=
Sinusoidal vibration response curve of a civil aircraft electronic equipment, figureFileSmall=RDbI+FzvvO1gLtbGg8sEug==, figureFileBig=c1YtQFMc+o7PkqLazl/wOw==, tableContent=null), ArticleFig(id=1240594170205753693, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=图2, caption=
某民机电子设备正弦振动响应曲线, figureFileSmall=RDbI+FzvvO1gLtbGg8sEug==, figureFileBig=c1YtQFMc+o7PkqLazl/wOw==, tableContent=null), ArticleFig(id=1240594170348360033, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=EN, label=Fig.3, caption=
Sinusoidal vibration response curves of an engine electronic equipment, figureFileSmall=cVjxqFJ8JuKEC5u5qMuDdw==, figureFileBig=JoPwSsvicKEq8TUbGyBrJg==, tableContent=null), ArticleFig(id=1240594170469994858, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=图3, caption=
某发动机电子设备正弦振动响应曲线, figureFileSmall=cVjxqFJ8JuKEC5u5qMuDdw==, figureFileBig=JoPwSsvicKEq8TUbGyBrJg==, tableContent=null), ArticleFig(id=1240594170566463856, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=EN, label=Fig.4, caption=
Random vibration response curves of a jet aircraft electronic equipment, figureFileSmall=0Nme/l/wacclLLCVIF2EeQ==, figureFileBig=ZJhwHwWtbM7RRFaZIAMM1A==, tableContent=null), ArticleFig(id=1240594170704875891, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=图4, caption=
某喷气式飞机电子设备随机振动响应曲线, figureFileSmall=0Nme/l/wacclLLCVIF2EeQ==, figureFileBig=ZJhwHwWtbM7RRFaZIAMM1A==, tableContent=null), ArticleFig(id=1240594170818122105, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=EN, label=Fig.5, caption=
Random vibration response curves of a propeller aircraft electronic equipment, figureFileSmall=boqyssaj5KJM5dSxm4VkmA==, figureFileBig=7lI6doGaQXfDfMkkIHLX/g==, tableContent=null), ArticleFig(id=1240594170897813886, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=图5, caption=
某螺旋桨飞机电子设备随机振动响应曲线, figureFileSmall=boqyssaj5KJM5dSxm4VkmA==, figureFileBig=7lI6doGaQXfDfMkkIHLX/g==, tableContent=null), ArticleFig(id=1240594171002671489, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=EN, label=Fig.6, caption=
Time domain diagram of instantaneous acceleration of random vibration, figureFileSmall=HGhSDojgGhRf6aIEVMD/Bw==, figureFileBig=FRhSIAUdL6Rg2867EVu/MA==, tableContent=null), ArticleFig(id=1240594171128500614, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=图6, caption=
随机振动瞬时加速度时域图, figureFileSmall=HGhSDojgGhRf6aIEVMD/Bw==, figureFileBig=FRhSIAUdL6Rg2867EVu/MA==, tableContent=null), ArticleFig(id=1240594171233358216, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=EN, label=Fig.7, caption=
S-N test data of the 6061 aluminum alloy, figureFileSmall=Zzd+DY8q7JJS0fFWjSqu0A==, figureFileBig=2iGOkv23eEJYWmnQdJMbLA==, tableContent=null), ArticleFig(id=1240594171317244303, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=图7, caption=
6061铝合金S-N试验数据, figureFileSmall=Zzd+DY8q7JJS0fFWjSqu0A==, figureFileBig=2iGOkv23eEJYWmnQdJMbLA==, tableContent=null), ArticleFig(id=1240594172802027922, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=EN, label=Tab.1, caption=
Model of base transmissibility
, figureFileSmall=null, figureFileBig=null, tableContent=
| 基本模型 Base model |
|---|
STEINBERG模型 STEINBERG model | IRVINE 模型 IRVINE model |
|---|
适用范围 Scope of application | 正弦振动 Sinusoidal vibration | 随机振动 Random vibration |
准确度 Accuracy | 较高 Higher | 较低 Lower |
), ArticleFig(id=1240594172986577304, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=表1, caption=
基本传递率模型
, figureFileSmall=null, figureFileBig=null, tableContent=
| 基本模型 Base model |
|---|
STEINBERG模型 STEINBERG model | IRVINE 模型 IRVINE model |
|---|
适用范围 Scope of application | 正弦振动 Sinusoidal vibration | 随机振动 Random vibration |
准确度 Accuracy | 较高 Higher | 较低 Lower |
), ArticleFig(id=1240594173108212123, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=EN, label=Tab. 2, caption=
Comparison of random vibration transmissibility calculation
, figureFileSmall=null, figureFileBig=null, tableContent=
频率 Frequency/Hz | 实测值 Test value Q | IRVINE模型 IRVINE model | 改进后模型 Optimized model |
|---|
计算值 Calculation value | 相对误差 Relative error/% | 计算值 Calculation value | 相对误差 Relative error/% |
|---|
| 1 425 | 79.89 | 71.72 | -10.2 | 76.58 | -4.14 |
| 100 | 7.33 | 6.68 | -8.9 | 7.14 | -2.6 |
), ArticleFig(id=1240594173263401378, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594157325046634, language=CN, label=表2, caption=
随机振动传递率计算对比
, figureFileSmall=null, figureFileBig=null, tableContent=
频率 Frequency/Hz | 实测值 Test value Q | IRVINE模型 IRVINE model | 改进后模型 Optimized model |
|---|
计算值 Calculation value | 相对误差 Relative error/% | 计算值 Calculation value | 相对误差 Relative error/% |
|---|
| 1 425 | 79.89 | 71.72 | -10.2 | 76.58 | -4.14 |
| 100 | 7.33 | 6.68 | -8.9 | 7.14 | -2.6 |
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