振動試驗機(jī)正弦試驗方法

    環(huán)境試驗是用于在實(shí)驗室內(nèi)模擬真實(shí)振動環(huán)境的效應(yīng)。振動試驗臺的振動試驗是在振動臺上采用不同的輸入信號激勵樣品。試驗方法按輸入信號的特性分類。常見的振動試驗機(jī)的試驗方法有正弦和隨機(jī)振動，表現(xiàn)的是不同的物理過程。下面是關(guān)于振動試驗機(jī)的正弦振動試驗描述：

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:

    正弦振動試驗（GB/T 2423. 10）使用固定或變化的頻率和幅值的正弦信號。在每一瞬時僅施加一個頻率。振動試驗臺試驗條件包括頻率范圍（頻帶）或固定頻率、振幅和試驗持續(xù)時間。

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)境中振動試驗臺正弦振動很少以單一頻率的振動形式獨(dú)立出現(xiàn)。即使在旋轉(zhuǎn)的機(jī)械上直接測量加速度時也是這樣。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)特性也會產(chǎn)生某種形式的隨機(jī)振動。

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.

    正弦振動可以描述為確定性運(yùn)動，遵循確定的規(guī)律，*可以從過去的狀態(tài)來確定未來任意時間的狀態(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)行正弦掃頻試驗過程中，該方法通常用來確定出現(xiàn)失效的時刻，因為這個失效很可能是和特定頻率密切相關(guān)的，而用振動試驗臺隨機(jī)振動試驗方法這種相關(guān)效果不是很明顯。當(dāng)然，相對于隨機(jī)試驗方法，正弦試驗方法通常需要用更長的時間激發(fā)出失效，這是因為在每次掃頻過程中，在每個共振點(diǎn)上只作用很短的時間。盡管在任一時刻只施加一個頻率，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。也可用來發(fā)現(xiàn)潛在的破壞性共振點(diǎn)，尤其是在設(shè)計和研制試驗中。

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.