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振動(dòng)試驗(yàn)機(jī)正弦試驗(yàn)方法

    環(huán)境試驗(yàn)是用于在實(shí)驗(yàn)室內(nèi)模擬真實(shí)振動(dòng)環(huán)境的效應(yīng)。振動(dòng)試驗(yàn)臺(tái)的振動(dòng)試驗(yàn)是在振動(dòng)臺(tái)上采用不同的輸入信號(hào)激勵(lì)樣品。試驗(yàn)方法按輸入信號(hào)的特性分類(lèi)。常見(jiàn)的振動(dòng)試驗(yàn)機(jī)的試驗(yàn)方法有正弦和隨機(jī)振動(dòng)，表現(xiàn)的是不同的物理過(guò)程。下面是關(guān)于振動(dòng)試驗(yàn)機(jī)的正弦振動(dòng)試驗(yàn)描述：

Environmental testing is used to simulate the real vibration environment effects in laboratory. Vibration te. Vibration test vibration test bench is the incentive samples using different input signals in vibration table. Test method according to the characteristics of the input signal classification. Test method for vibration testing machine common with sine and random vibration, is the performance of the different physical processes. Below is a description of sinusoidal vibration test on vibration test machine:

    正弦振動(dòng)試驗(yàn)（GB/T 2423. 10）使用固定或變化的頻率和幅值的正弦信號(hào)。在每一瞬時(shí)僅施加一個(gè)頻率。振動(dòng)試驗(yàn)臺(tái)試驗(yàn)條件包括頻率范圍（頻帶）或固定頻率、振幅和試驗(yàn)持續(xù)時(shí)間。

Test conditions including frequency range (band) or fixed frequency, amplitude and duration of the test. In the real environment in the form of sine vibration little vibration of single frequency independent. This is directly measured acceleration even in rotating machinery.

    真實(shí)環(huán)境中振動(dòng)試驗(yàn)臺(tái)正弦振動(dòng)很少以單一頻率的振動(dòng)形式獨(dú)立出現(xiàn)。即使在旋轉(zhuǎn)的機(jī)械上直接測(cè)量加速度時(shí)也是這樣。如齒輪和軸承，實(shí)際存在的公差和間隙，通常導(dǎo)致在頻率上有微小的變化。旋轉(zhuǎn)機(jī)械的隨機(jī)特性也會(huì)產(chǎn)生某種形式的隨機(jī)振動(dòng)。

This is directly measured acceleration even in rotating machinery. Such as gears and bearings, tolerances and clearances exist, often lead to small changes in frequency. Random random vibration characteristics of rotating machinery will also have some form of. Random random vibration characteristics of rotating machinery will also have some form of.

    正弦振動(dòng)可以描述為確定性運(yùn)動(dòng)，遵循確定的規(guī)律，*可以從過(guò)去的狀態(tài)來(lái)確定未來(lái)任意時(shí)間的狀態(tài)。

Sine vibration can be described as a deterministic motion, follow certain rules, can determine the future of any given time state from the past state.

    在進(jìn)行正弦掃頻試驗(yàn)過(guò)程中，該方法通常用來(lái)確定出現(xiàn)失效的時(shí)刻，因?yàn)檫@個(gè)失效很可能是和特定頻率密切相關(guān)的，而用振動(dòng)試驗(yàn)臺(tái)隨機(jī)振動(dòng)試驗(yàn)方法這種相關(guān)效果不是很明顯。當(dāng)然，相對(duì)于隨機(jī)試驗(yàn)方法，正弦試驗(yàn)方法通常需要用更長(zhǎng)的時(shí)間激發(fā)出失效，這是因?yàn)樵诿看螔哳l過(guò)程中，在每個(gè)共振點(diǎn)上只作用很短的時(shí)間。盡管在任一時(shí)刻只施加一個(gè)頻率，如果掃頻速率足夠慢，確實(shí)可以使得樣品的特定共振峰達(dá)到大。也可用來(lái)發(fā)現(xiàn)潛在的破壞性共振點(diǎn)，尤其是在設(shè)計(jì)和研制試驗(yàn)中。

In the sine sweep test process, the method is usually used to determine the failure moment, because of this failure is likely to be closely related with specific frequency, and the use of such test method for random vibration related effect is not obvious. Of course, compared to the random test method, test method of sinusoidal excitation failure usually takes longer, it is because during each sweep process, at each resonance point only a short time. Although at any one time only applying a frequency, if the sweep rate is slow enough, can indeed make specific resonance peak of the sample reaches the maximum. Can also be used to find the resonance point of destructive potential, especially in the design and development of test.