Diesel engine test base installation state inherent frequency test method and device
A technology of natural frequency and installation state, which is applied in the field of natural frequency test of diesel engine test base installation state, and can solve problems such as inaccurate natural frequency test results
Active Publication Date: 2020-10-16
HENAN DIESEL ENGINE IND
View PDF10 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In order to solve the problem of inaccurate test results of the natural frequency of the diesel engine test base in the prior art, the present invention provides a method and device for testing the natural frequency of the diesel engine test base in the installation state, which uses the excitation generated by the operation of the diesel engine to collect and analyze the natural frequency of the base , can effectively solve the above technical problems
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described here are used to explain the present invention, but not to limit the scope of the present invention.
[0022] Specific embodiment I: the described PC terminal 1 can be a notebook computer.
[0023] Such as figure 2 As shown, a natural frequency test device for the installation state of a diesel engine test base includes a notebook computer, which communicates with a signal acquisition instrument 3 through a communication network cable 2, and the signal acquisition instrument 3 is connected to a rotational speed sensor 6 and a set of The vibration acceleration sensor 4 and the rotation speed sensor 6 are installed near the gear plate for measuring the rotation speed of the diesel engine. The vibration acceleration sensor 4 is arranged on the diesel engine test base 5, and the rotation...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
In order to solve the problem that in the prior art, a diesel engine test base inherent frequency test result is inaccurate, the invention provides a diesel engine test base installation state inherent frequency test method and device, and the method is characterized by comprising the following steps of: S1, collecting a vibration time domain signal of a test base and the rotating speed of a diesel engine; S2, performing Fourier transform on the vibration time domain signal in the S1 into a vibration frequency domain signal; S3, acquiring a frequency spectrum curve of which the abscissa is frequency and the ordinate is vibration amplitude; and S4, sequentially analyzing the frequency spectrum curve in the S3 according to a spectrogram analysis method and an order slice diagram analysis method to obtain the inherent frequency of a certain order of the test base. The inherent frequency of the test base is measured in an installation state, the inherent frequency of the diesel engine baseis collected and analyzed through excitation generated by work of the diesel engine, and the inherent frequency of a certain order of the test base can be rapidly and accurately obtained.
Description
technical field [0001] The invention relates to the field of high-speed diesel engine testing, in particular to a method and device for testing the natural frequency of a diesel engine test base installation state. Background technique [0002] Traditional testing methods for the natural frequency of the installed state of the oil engine test base, such as the hammering method, because the base is too solid in the installed state, it is almost difficult to arouse an effective frequency response curve, and the natural frequency is also difficult to separate and capture. [0003] The conventional procedure for the natural frequency test of the existing diesel engine test base is: firstly, the free state modal test is carried out, and the natural frequency and mode shape of the base are obtained through the test means; then the test results are compared with the simulation calculation results, and the model is adjusted to make the The state of the model is close to the measured...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01P3/00
CPCG01H17/00G01P3/00Y02T90/00
Inventor 郭建超姬仕强郑蒙蒙朱曦孟亮虎赵德
Owner HENAN DIESEL ENGINE IND