The K(t) is described in the VDI 3832 guideline and is calculated from the RMS value and the absolute maximum of a broadband time signal of the oscillation acceleration. For the time signal, the entire available frequency spectrum is used for calculation.
This ratio correlates to the reference values. The reference values should be measured by the operator shortly after the running-in time. These values can be classified as "Plant in order" and are therefore the initial values.
The K(t) value decreases with progressive wear. This allows it to be classified into 3 groups:
•Undamaged
•Early damage
•Pronounced damage
在 VDI 3832准则中对 K(t) 值进行了描述，是由振动加速度的带宽时间信号的有效值和绝对最大值计算出来的。对于时间信号，整个可用的频谱都被用于计算。
这个比率与参考值相关，参考值应该由操作人员在设备试转（磨合）不久后进行测量。这些值可以被归类为 "Plant in order"（工厂提供），因此是初始值。
The K(t) 值随着逐渐的磨损而减少。这使得它可以被分为3组：
•未损坏
•早期损坏
•明显损坏
The advantage of the K(t) value is that does not change much, even when damage is severe.
K（t）值的优点是即使在严重损坏的情况下也不会发生太大的变化。
The following applies:
以下内容适用：
Formula symbols 公式符号 |
Explanation 解释 |
Characteristic value in the module 模块中的特征值 |
|---|---|---|
ɑrms(0) |
RMS value of the reference value 有效值参考值 |
RmsHighFrequencyRef RmsRawRef 高通后的有效值参考值 原始信号有效值参考值 |
ɑp(0) |
Maximum value of the reference value 最大值（峰值）参考值 |
PeakHighFrequencyRef PeakRawRef 计算后的原始峰值参考值 原始峰值参考值 |
ɑrms(t) |
Current RMS value 当前有效值 |
RmsHighFrequency RmsRaw 高通后的有效值参考值 原始信号的有效值 |
ɑp(t) |
Current absolute maximum 当前绝对最大值（峰值） |
PeakHighFrequency PeakRaw 高通后的峰值 峰值原始值 |
Example
举例
Possible progression of the (K/t) characteristic value
K(t) 值的可能发展趋势
Fig.: K(t) value progression
图.: K(t) 值可能的发展趋势