Right!
- Random vibration is usually described using a probabilistic approach. Probability reflects the probability of a random event. The result of a random event is described in terms of quantity, and the concept of a random variable is derived. Because it describes the development process of a random variable, it is also called a random process, and random vibration is just a type of instance of a random process.
- Assume that a certain random test (such as a car road test) is repeated under certain conditions, and a series of time-varying history records of the system response (such as the vertical acceleration of the driver's seat) are obtained (see the figure). Each record
- There are two main aspects:
- Excitation-response relationship As mentioned earlier, the excitation-response relationship in random vibration problems can only be described as the relationship between their statistical characteristics. A linear system with constant coefficients produces a stationary random response Y under the action of stationary random excitation X. At this time, there is the following relationship about the average value:
- 1, entry of: Chen Bin. "Encyclopedia of China" Volume 74 (First Edition) Mechanics Entry: Random Vibration: Encyclopedia of China Press, 1987: 455-456.
