Emergency, online, etc. There is an English translator and a capable friend to help.

General information

In the past, intermittent wave records were usually produced in the form of handwriting on continuous waves.

Chart volume, and then manually handle (see 26.4.2). Chart records can be converted into

Digital data, and analysis on the computer, to produce the required parameters (see 26.4.3).

Manual analysis of chart records is very time-consuming and has been replaced by electronic records.

Direct computer analysis. No matter which recording system you use, it is wise to keep the original data so that

Identify faults in equipment.

Manual analysis

Chart recording usually lasts from 12 minutes to 20 minutes, and it can be taken every 3 hours or 4 hours, so it can be processed.

Manual [22] [23].

The analysis gives the estimated values of Hs and Tz for each record, which can then be extrapolated.

The effective wave height of the required return period can be further extrapolated to if necessary.

The design maximum wave height under various probabilities is given. Or, the average maximum wave

The height that appears between records can first be determined by assuming that the wave train is from

The recording of 10 minute lasts for the following 3-hour or 4-hour interval, and then the maximum value is generated.

The required design conditions are obtained by extrapolation (but see 27.2. 1). The method of extrapolation is described

In article 27.

computational analysis

Chart records can also be analyzed using a curve tracker, which converts chart data into

It can be processed on a computer to obtain digital data of one-dimensional spectrum. where

Information is recorded directly in digital form, and spectral analysis can be carried out faster.

26.4 record analysis

26.4. 1 Generally speaking, before a continuous handwriting, intermittent waveform records are usually generated as chart volumes, and these records will be manually processed (see 26.4.2). Graphic records can be converted into

Digital data and analysis lead to necessary parameters on the computer (see 26.4.3).

Manual analysis of chart records is time-consuming and has been replaced by electronic records and direct computer analysis. It is wise to keep the original data and use the recording system in order to identify equipment failures.

26.4.2 Guide analysis usually lasts from the chart record of 12 minutes to the minimum, and can be processed 20 times every 3 hours or 4 hours.

Manual [22] [23].

The analysis gives the estimated values of Hs and Tz for each record, which can then be extrapolated to the effective wave height of the necessary recurrence period and the maximum wave height of the given design, and further extrapolated to various possibilities if necessary. Alternatively, it can be assumed that the height of the average maximum wave appears between records. First, estimate the maximum value of 10 minute from the wave train records obtained in the following 3-hour or 4-hour intervals, and then extrapolate the necessary design conditions (but see 27.2. 1). The inference method is described.

At entrance 27.

26.4.3 Curve tracking machine is used for calculation and analysis. Chart records can also be analyzed and converted into digital data, which can be processed on the computer to obtain one-dimensional spectrum. over there

Information is recorded directly in digital form, and spectral analysis can be carried out faster.