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Comprehensive construction method for engine shell vibration general picture

A technology of engine casing and construction method, which is applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as poor practicability, and achieve good practicability.

Active Publication Date: 2017-04-26
中国船舶重工集团公司第七0五研究所
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Problems solved by technology

[0006] In order to overcome the shortcomings of the poor practicability of the construction method of the existing engine casing vibration profile map

Method used

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  • Comprehensive construction method for engine shell vibration general picture
  • Comprehensive construction method for engine shell vibration general picture
  • Comprehensive construction method for engine shell vibration general picture

Examples

Experimental program
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Embodiment Construction

[0043] refer to Figure 1-3 . In this embodiment, for a tubular engine with a casing, the operating conditions are simulated by using the cold-state dragging method of the motor, and the vibration data obtained by the laser surface vibration meter are used. Due to the limitation of the fixed support method during the test, the measurement object (engine casing) was divided into 4 surfaces, and the vibration data of the casing at the same speed were collected in 4 times, and the vibration of the casing was analyzed and synthesized based on the original information. The specific steps of the comprehensive construction method of the overview diagram and the vibration overview diagram of the engine casing are as follows:

[0044] a. Assuming that the laser head scans the entire surface of the shell in n times, the raw data collected each time is a set of time-domain series of each point in each area Among them, n(i) represents the i-th measuring point of the n-th surface;

[0...

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Abstract

The invention discloses a comprehensive construction method for an engine shell vibration general picture, and is used for solving the technical problem of poor practicality of an existing construction method for the engine shell vibration general picture. The technical scheme is characterized in that a way of uniform revolving speed and steady state clamping is adopted, and the vibration information of tested equipment in each area is measured in different times; then, the position information of each measurement point on the shell is synthesized to carry out compensation calculation on the original vibration information obtained by measurement, and the 1 / 3-time frequency interval vibration numerical value of each measurement point under a certain center frequency is calculated by the data; according to the outline structure of the shell, a three-dimensional model is established, and a measurement point distribution model is established according to a practical distribution situation; and finally, a measurement point coordinate and a measurement sequence are followed to splice a plurality of area surface vibration matrixes, so that the vibration information which is in the presence is converted into a matrix which can integrally express shell vibration characteristics, and data in the matrix corresponds to the measurement point of a shell model one by one to establish a three-dimensional vibration general picture model. The method exhibits good practicality.

Description

technical field [0001] The invention relates to a method for constructing a vibration profile map of an engine casing, in particular to a method for comprehensively constructing a vibration profile map of an engine casing. Background technique [0002] The barrel engine has the advantages of compact structure, large volume ratio and high power. It is widely used in aircraft, rockets, ships, underwater vehicles and other vehicles, and is regarded as the "heart" of the whole machine. With the continuous improvement of the functional requirements of the mechanical carrier, it is necessary to strictly control or even reduce the noise and improve the stealth performance while greatly increasing the engine power. [0003] The shell of the cylindrical engine has a large surface area. Due to the connection between the shell and multiple hydraulic pipelines and vibration isolation rings, the vibration characteristics of different positions are very different. Long-term harsh working ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 高慧中孙涛刘景云
Owner 中国船舶重工集团公司第七0五研究所
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