振动试验机正弦试验方法

    环境试验是用于在实验室内模拟真实振动环境的效应。振动试验台的振动试验是在振动台上采用不同的输入信号激励样品。试验方法按输入信号的特性分类。常见的振动试验机的试验方法有正弦和随机振动，表现的是不同的物理过程。下面是关于振动试验机的正弦振动试验描述：

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:

    正弦振动试验（GB/T 2423. 10）使用固定或变化的频率和幅值的正弦信号。在每一瞬时仅施加一个频率。振动试验台试验条件包括频率范围（频带）或固定频率、振幅和试验持续时间。

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.

    真实环境中振动试验台正弦振动很少以单一频率的振动形式独立出现。即使在旋转的机械上直接测量加速度时也是这样。如齿轮和轴承，实际存在的公差和间隙，通常导致在频率上有微小的变化。旋转机械的随机特性也会产生某种形式的随机振动。

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.

    正弦振动可以描述为确定性运动，遵循确定的规律，*可以从过去的状态来确定未来任意时间的状态。

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.

    在进行正弦扫频试验过程中，该方法通常用来确定出现失效的时刻，因为这个失效很可能是和特定频率密切相关的，而用振动试验台随机振动试验方法这种相关效果不是很明显。当然，相对于随机试验方法，正弦试验方法通常需要用更长的时间激发出失效，这是因为在每次扫频过程中，在每个共振点上只作用很短的时间。尽管在任一时刻只施加一个频率，如果扫频速率足够慢，确实可以使得样品的特定共振峰达到大。也可用来发现潜在的破坏性共振点，尤其是在设计和研制试验中。

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.