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諧振式曲軸疲勞試驗誤差分析及載荷標定方法
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    摘要:

    建立了諧振式曲軸彎曲疲勞試驗振動系統(tǒng)的數(shù)學模型,,推導了動載荷的原型函數(shù),;結(jié)合試驗觀察的數(shù)據(jù),分析了載荷標定的誤差來源,,著重對應變測量環(huán)節(jié)的誤差進行了詳細探討并進一步推導了可用于標定擬合的動載荷原型函數(shù)的合理形式,。據(jù)此函數(shù)形式,建立了標定擬合的數(shù)值算法,。實踐檢驗表明,,這種改進的標定計算方法符合諧振加載的基本規(guī)律,適應性強,,標定精度高,,優(yōu)于其他擬合方法。

    Abstract:

    Based on the mathematical model of resonant-loading fatigue test system, the prototype function of dynamic-loading was derived. With reference to the test data, the error source of loading-calibration has been analyzed. As a key point, error in strain measurement was estimated in detail. Furthermore, a modified prototype function was derived which was suitable for the fitting of dynamic test data. The number algorithm was also given. Lots of practical examples showed that the function type met the regular of resonant-loading well with a strong adaptability and high accuracy. It is better than other fitting method.

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周迅,俞小莉.諧振式曲軸疲勞試驗誤差分析及載荷標定方法[J].農(nóng)業(yè)機械學報,2007,38(4):35-38.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(4):35-38.

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