ISO 18312的本部分规定了评估机器或管道发出的振动功率的方法， 以下简称机器，在操作条件下安装在支撑结构上 机器通过螺栓接头直接连接。ISO 18312的本部分规定了评估的方法 在笛卡尔坐标系的六个自由度中，在 每个关节，即三次平移和三次旋转。振动功率由处理 在操作条件下，安装在螺栓接头上的力和速度（或加速度）传感器发出的信号 感兴趣的条件。该方法适用于假设其振动可忽略的机器 以平稳随机过程为特点。 通过计算振动频率，得到了发射振动功率的频域分量 每个螺栓连接处具有给定窄带宽度的力和速度测量对的交叉谱。 这种直接方法假设支撑结构具有足够的刚性，因此不适用 对于地基或支撑结构具有弹性的情况，这将潜在地进入一种状态。 在感兴趣的频率范围内发生共振。本节规定了该方法的实际频率限制 ISO 18312的一部分。 ISO 18312的本部分可用于以下操作条件: a） （螺栓连接）接头处机器振动功率排放规范； b） 振动功率严重性的识别； c） 解决诊断问题； d） 规划振动控制措施。

This part of ISO 18312 specifies a method for evaluating the vibration power emitted by machines or pipelines, referred to hereinafter as machines, under operational conditions on to supporting structures to which the machines are directly connected via bolted joints. This part of ISO 18312 specifies the method for evaluating the vibration power components emitted in the six degrees of freedom of a Cartesian coordinate system at each joint, i.e. three translations and three rotations. The vibration power is determined by processing the signals from force and velocity (or acceleration) transducers mounted on to the bolted joints under operational conditions of interest. This method is applicable for machines under the assumption that their vibration can be characterized by a stationary random process. The components of emitted vibration power in the frequency domain are obtained by computing the cross？spectrum of the force and velocity measurement pairs with a given narrow band width at each bolted joint. This direct method assumes that the supporting structures are adequately rigid and, hence, it is not applicable to cases where the foundation or supporting structures are resilient, which will potentially go into a state of resonance within the frequency range of interest. Practical frequency limits of the method are specified in this part of ISO 18312. This part of ISO 18312 can be used in operational conditions for: a) specification of vibration power emission of machines at the (bolted) joints; b) identification of vibration power severity; c) resolving diagnostics issues; d) planning vibration control measures.