KR101097414B1

KR101097414B1 - Pipe vibration estimation method

Info

Publication number: KR101097414B1
Application number: KR1020100003946A
Authority: KR
Inventors: 전창빈; 조승희; 원윤호; 송정욱
Original assignee: 한국전력기술 주식회사
Priority date: 2010-01-15
Filing date: 2010-01-15
Publication date: 2011-12-23
Also published as: KR20110083952A

Abstract

The present invention relates to a pipe vibration evaluation method. Pipe vibration evaluation method according to the present invention comprises the steps of extracting the design information of the pipe that is previously input to the memory unit; Measuring vibration of the pipe using the extracted information; And comparing the measured data with the allowable data to evaluate the integrity of the pipe.

Description

Pipe vibration estimation method

The present invention relates to a pipe vibration evaluation method, and more particularly, to an improved pipe vibration evaluation method to accurately and efficiently perform pipe soundness evaluation.

The vibration evaluation of the pipe is to evaluate the vibration level or risk of the piping of the nuclear power plant during operation, and to verify the soundness of the piping system by evaluating the vibration of the pipe under test in the field.

Existing pipe vibration data evaluation method, as shown in Fig. 1, by evaluating the acquired data by a numerical calculation, first with reference to the stress analysis pipe ISO drawing (Stress ISO Dwg.) And span with a sketch for the simple beam , Boundary condition, measurement direction, amplitude, frequency, etc. were recorded and soundness was evaluated by numerical calculation method. Existing evaluation method has a disadvantage that it takes a lot of time to evaluate the vibration data because it records the measurement position and various information directly in the evaluation form, and collect the relevant data to calculate the vibration evaluation.

In addition, in order to perform the vibration test, it is necessary to check the pipe under test in the field, check the installation condition, and monitor the pipe vibration while operating the system according to the operation mode. It is very difficult to find the test target pipe using the installation drawing at the power plant site, and there is a problem in that the test section and the installation state must be checked by finding the target pipe at the site before the test.

The present invention has been made to solve the above problems, an object of the present invention is to allow the test target pipe to be measured in the field to automatically evaluate the vibration evaluation through the previously input data information without the calculation of the number It is to provide a pipe vibration evaluation method that can efficiently evaluate the soundness of the pipe.

Another object of the present invention is to provide a pipe vibration evaluation method that can efficiently check the position of the pipe under test in the field.

The present invention for achieving the above object comprises the steps of extracting the design information of the inspection target pipe from the EDB information previously input to the memory unit; Measuring vibration of the pipe using the extracted information; And comparing the measured data with the allowable data to evaluate the integrity of the pipe.

The present invention preferably further comprises the step of checking the position of the pipe to be measured by using the position information of the pipe input to the memory unit.

The checking of the position of the pipe may include: implementing position information of the pipe by a three-dimensional model corresponding to all pipes including the pipe to be inspected; Constructing a database of each pipe corresponding to the position information of the pipe; And displaying the position of each pipe by 3D modeling using the database.

The present invention, if the pipe to be measured is a simple beam model, calculating the first natural frequency of the simple beam model and comparing the calculated result and the measured frequency of the pipe; preferably further comprises a .

The present invention may further include updating the measured data and the allowable data to the memory unit.

Pipe vibration evaluation method according to the present invention having the configuration as described above, through the design information of the pre-built pipe can be efficiently assessed the soundness of the vibration of the pipe in the field, and through the three-dimensional modeling It is easy to find the installed pipe in the field by using the location information of the input pipe, which has the advantage of increasing the efficiency of the evaluation work.

1 is a view for schematically explaining a pipe vibration evaluation method according to the prior art.
2 is a view for schematically explaining a pipe vibration evaluation method according to an embodiment of the present invention.
3 is a block diagram for implementing one embodiment of the present invention;
4 is a logic flow diagram of an embodiment of the present invention.

Hereinafter, a pipe vibration evaluation method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a view for schematically explaining a pipe vibration evaluation method according to an embodiment of the present invention, Figure 3 is a block diagram for implementing an embodiment of the present invention, Figure 4 is a logic flow diagram of an embodiment of the present invention to be.

As shown in these drawings, the pipe vibration evaluation method according to the present invention can efficiently evaluate the pipe vibration in the field using EDB information (Engineering Data Base, integrated design information) previously input to the memory unit. Has an advantage. In this embodiment, the memory unit comprises a piping design information memory unit 1 into which the piping design information is input and a piping position information memory unit 2 into which the position information of the piping is pressed.

That is, according to the present invention, when the design information of the pipe to be tested is constructed and the measured data are to be measured, the pipe vibration is extracted through a computer having a control unit 3, a measurement unit 4, and a calculation unit 5. By automatically performing the calculation, the pipe's soundness can be efficiently evaluated.

In this way, the control unit 3 measures the vibration of the pipe by using the data extracted from the pipe design information memory unit 1 by the measurement unit 4, and automatically calculates using the extracted design information. By evaluating the vibration allowance data and the measurement data measured in the field to the calculation unit 5, the integrity of the pipe is evaluated.

The present invention is preferably configured to identify the position of the test target pipe to be measured by using the position information of the pipe previously input to the pipe position information memory section 2.

Position information of the pipe is preferably configured to be displayed by three-dimensional modeling. In this embodiment, the control unit 3 is configured to output the position information of the pipe extracted from the pipe position information memory unit 2 to the output unit.

The output section includes a display section 6 for displaying position information of the pipe on a monitor of the computer. Furthermore, it is also possible for the output part to have a printing part 7 for printing the position information of the pipe and the evaluated vibration evaluation data.

On the other hand, this embodiment includes the step of updating the design information of the pipe. That is, since the integrity evaluation of the test target pipe should be made periodically, it is preferable to update the recently measured evaluation data so that it can be used later for the soundness evaluation of the vibration of the pipe.

And, although not shown, the present invention further comprises the step of calculating the first natural frequency of the simple beam model, and comparing the calculated frequency and the measured pipe frequency when the pipe to be tested is a simple beam model It is preferable.

Pipe vibration evaluation method according to the present invention having the configuration as described above, through the design information of the pre-built pipe can be efficiently assessed the soundness of the vibration of the pipe in the field, and through the three-dimensional modeling The location of the pipe to be inspected in the field can be easily found by using the position information of the input pipe, which has the advantage of increasing the efficiency of the evaluation work.

For example, if the measured frequency of the pipe is greater than the natural frequency of the simple beam model, it can be seen that the span of the model is conservatively determined.

As mentioned above, although preferred embodiment about this invention was described, this invention is not limited to the above-mentioned embodiment, It is defined by what was described in the claim, and it is clear that various deformation | transformation and adaptation are possible in the technical field to which this invention belongs. Do.

1: Piping design information memory section 2: Piping position information memory section
3: control unit 4: measuring unit
5: calculation part 6: display part
7: Printing department

Claims

Extracting design information of the inspection target pipe from the EDB information previously input to the memory unit;
Measuring vibration of the pipe using the extracted information; And
Evaluating the integrity of the pipe by comparing the measured data with the allowable data; And
Updating the measured data and the allowable data in the memory unit; Pipe vibration evaluation method comprising a.

The method of claim 1,
Checking the position of the pipe to be measured by using the position information of the pipe input to the memory unit; pipe vibration evaluation method further comprising.

The method of claim 2,
Checking the position of the pipe,
Implementing position information of the pipe by a three-dimensional model corresponding to all pipes including the pipe to be inspected;
Constructing a database of each pipe corresponding to the position information of the pipe; And
And displaying the position of each of the pipes by 3D modeling using the database.

The method of claim 1,
If the pipe to be measured is a simple beam model, calculating the first natural frequency of the simple beam model and comparing the calculated frequency and the measured frequency of the pipe; pipe vibration evaluation further comprising Way.

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