JPS5663218A - Transient response analysis method for natural vibration mode - Google Patents
Transient response analysis method for natural vibration modeInfo
- Publication number
- JPS5663218A JPS5663218A JP13867879A JP13867879A JPS5663218A JP S5663218 A JPS5663218 A JP S5663218A JP 13867879 A JP13867879 A JP 13867879A JP 13867879 A JP13867879 A JP 13867879A JP S5663218 A JPS5663218 A JP S5663218A
- Authority
- JP
- Japan
- Prior art keywords
- amplitude
- obtaining
- natural vibration
- vibration mode
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To increase the accuracy of analysis, by obtaining the attenuation factor of the reponse amount after obtaining the amplitude through the Fourier trnasformation and in the finite section decided with the cycle of the natural vibration mode for the optional one of the several natural vibration mode components which are sampled in a certain time interval and then repeating the amplitude obtained with a time shift equivalent to every fixed number of data.
CONSTITUTION: The Fourier transformation gives a linear spectrum in terms of the time-series digital data in the finite section sampled in a certain time when the input function is the cycle function which becomes an integer cycle in the finite section. Based on this throry and for an optional mode among the time-series digital response data containing the plural natural frequency components, a Fourier conversion is carried out in the section T=N/f0 (N=1, 2...) which is decided by the frequency f0 of obtain the amplitude. The amplitude is obtained by selecting a small value for the N and also giving a time shift gradually to the data sections, thus obtaining the attenuation factor of the mode component each. In such way, both the response amount and the attenuation factor can be obtained in a high accuracy.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13867879A JPS5663218A (en) | 1979-10-29 | 1979-10-29 | Transient response analysis method for natural vibration mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13867879A JPS5663218A (en) | 1979-10-29 | 1979-10-29 | Transient response analysis method for natural vibration mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5663218A true JPS5663218A (en) | 1981-05-29 |
Family
ID=15227541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13867879A Pending JPS5663218A (en) | 1979-10-29 | 1979-10-29 | Transient response analysis method for natural vibration mode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5663218A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6147521A (en) * | 1984-08-13 | 1986-03-08 | Toyota Motor Corp | Apparatus for measuring attenuation ratio |
| CN106482827A (en) * | 2016-11-11 | 2017-03-08 | 北京航空航天大学 | Electronic product based on crosspower spectrum function Modal Parameter Identification vibrates DLP method |
| JP2022087010A (en) * | 2020-11-30 | 2022-06-09 | ▲広▼州大学 | Time varying structure instantaneous frequency determination method, system, device, and storage medium |
-
1979
- 1979-10-29 JP JP13867879A patent/JPS5663218A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6147521A (en) * | 1984-08-13 | 1986-03-08 | Toyota Motor Corp | Apparatus for measuring attenuation ratio |
| JPH0357416B2 (en) * | 1984-08-13 | 1991-09-02 | Toyota Motor Co Ltd | |
| CN106482827A (en) * | 2016-11-11 | 2017-03-08 | 北京航空航天大学 | Electronic product based on crosspower spectrum function Modal Parameter Identification vibrates DLP method |
| JP2022087010A (en) * | 2020-11-30 | 2022-06-09 | ▲広▼州大学 | Time varying structure instantaneous frequency determination method, system, device, and storage medium |
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