Engine frequency response load spectrum automatic processing method
An automatic processing and frequency response technology, which is applied in engine testing, special data processing applications, measuring vibration, etc., can solve the problems that cannot reflect the NVH characteristics of parts and cannot represent the vibration excitation of the engine, so as to reduce labor intensity and ensure integrity performance and improve the results of the analysis
Active Publication Date: 2021-11-26
JIANGLING MOTORS
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These two methods can only reflect the vibration excitation of the engine at a specific speed, but cannot represent the vibration excitation within the full speed range of the engine. Taking these two vibration loads as the input of the corresponding analysis of the parts cannot reflect the engine vibration of the parts in the full speed range NVH characteristics under excitation
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[0037] The present invention is described in detail below with reference to accompanying drawing and embodiment:
[0038] figure 2 is the acceleration load spectrum in the frequency range 0-1000 Hz, image 3 is the acceleration load spectrum in the frequency range 0-2000 Hz.
[0039] attached Figure 1-5 It can be seen that a method for automatic processing of engine frequency response load spectrum comprises the following steps:
[0040] Step S101, the NVH test equipment measures the acceleration load of the excitation point of the engine parts, and obtains the time domain acceleration value of the excitation point at different engine speeds;
[0041] Step S102, converting the time-domain acceleration value into frequency-domain acceleration data through Fourier transform;
[0042] Step S103, exporting the frequency domain acceleration data as a file in txt format; using the written program to read the frequency domain acceleration data;
[0043] Export the frequency-do...
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The invention relates to an engine frequency response load spectrum automatic processing method which comprises the following steps: automatically processing an engine acceleration load spectrum to obtain the maximum acceleration value of each frequency in a full rotation speed range; obtaining an envelope line of the maximum acceleration peak value of each frequency under the full rotating speed as a vibration response and acoustic response analysis load spectrum; using an acceleration spectrum to examine vibration response and acoustic response of parts in a full rotation speed range of the engine; applying the automatic processing load spectrum technology, the acceleration load spectrum of the engine at the full rotating speed can be automatically processed, so that the integrity of load spectrum processing data is ensured, the labor intensity of engineers is reduced, and the working efficiency is improved. The vibration response and acoustic response results of the part in the full rotating speed range of the engine can be obtained, analysis resources are saved, and a more reliable guarantee is provided for NVH optimization of the part.
Description
technical field [0001] The invention relates to a noise control method of an automobile engine, in particular to an automatic processing method of an engine frequency response load spectrum. Background technique [0002] The problem of engine vibration and noise has a great impact on the NVH performance of the vehicle, and effective control of engine vibration and noise has become an indispensable part of the development of automotive NVH. The main structural parts and thin-walled parts of the engine play a decisive role in the NVH performance of the engine. The NVH of existing engine structural parts mainly controls the mode, and analyzes the vibration response of parts at the same time. There are usually two types of response load spectra, one is the test acceleration load at the rated power point, and the other is the test acceleration load at the highest engine speed. These two methods can only reflect the vibration excitation of the engine at a specific speed, but cann...
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IPC IPC(8): G06F30/17G06F30/23G10L25/18G01M15/02G01H1/12G01H1/14
CPCG06F30/17G06F30/23G10L25/18G01M15/02G01H1/12G01H1/14
Inventor 魏涛曾小春袁晓军王毅徐小翔高洋洋周啟涛
Owner JIANGLING MOTORS