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諧振式曲軸疲勞試驗(yàn)誤差分析及載荷標(biāo)定方法
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    摘要:

    建立了諧振式曲軸彎曲疲勞試驗(yàn)振動(dòng)系統(tǒng)的數(shù)學(xué)模型，推導(dǎo)了動(dòng)載荷的原型函數(shù),；結(jié)合試驗(yàn)觀察的數(shù)據(jù),，分析了載荷標(biāo)定的誤差來(lái)源,，著重對(duì)應(yīng)變測(cè)量環(huán)節(jié)的誤差進(jìn)行了詳細(xì)探討并進(jìn)一步推導(dǎo)了可用于標(biāo)定擬合的動(dòng)載荷原型函數(shù)的合理形式,。據(jù)此函數(shù)形式,，建立了標(biāo)定擬合的數(shù)值算法,。實(shí)踐檢驗(yàn)表明,，這種改進(jìn)的標(biāo)定計(jì)算方法符合諧振加載的基本規(guī)律,，適應(yīng)性強(qiáng),，標(biāo)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(yàn)誤差分析及載荷標(biāo)定方法[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2007,38(4):35-38.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(4):35-38.

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