SU731324A1 - Method of measuring stresses in steel structure elements - Google Patents
Method of measuring stresses in steel structure elements Download PDFInfo
- Publication number
- SU731324A1 SU731324A1 SU782658971A SU2658971A SU731324A1 SU 731324 A1 SU731324 A1 SU 731324A1 SU 782658971 A SU782658971 A SU 782658971A SU 2658971 A SU2658971 A SU 2658971A SU 731324 A1 SU731324 A1 SU 731324A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- steel structure
- structure elements
- measuring stresses
- stresses
- measuring
- Prior art date
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
ти, кроме того, факт ненагруженности устанавливаетс всегда только предположительно , а это резко снижает точность измерений искомых напр жений.Moreover, the fact of non-loading is always presumably established only, and this drastically reduces the accuracy of measurements of the required stresses.
Цель изобретени - повышение точности измерени .The purpose of the invention is to improve the measurement accuracy.
Эта цель достигаетс тем, что изменение напр женного состо ни элемента конструкции производ т в одном месте в две ступени и измер ют на каждой стунени первую и вторую производные зависимости выходного сигнала преобразовател от приложенных напр жений и но значени м производных определ ют величину и знак искомых напр жений.This goal is achieved by varying the stress state of a structural element at one place in two stages and measuring the first and second derivatives of the output signal of the converter from the applied voltages on each stun and determining the magnitude and sign of the sought stress
Способ осуществл етс следующим образом .The method is carried out as follows.
Исследуемую точку элемента с помощью струбцины, зажима дополнительно нагружают (или разгружают) на величину Дсг, состо щую из Aai (перва ступень) и Аа2 (втора ступень). Дл каждой ступени фиксируют соответствующее изменение сигнала AL/i и ДС/2 на выходе электромагнитного датчика. Соответственно дл каждой ступени измер ют значени первой производной зависимости выходного сигнала датчика от приложенных напр женийThe test point of the element with the help of a clamp, the clamps are additionally loaded (or unloaded) by the value of DSG consisting of Aai (first stage) and Aa2 (second stage). For each stage, record the corresponding change in the signal AL / i and DC / 2 at the output of the electromagnetic sensor. Accordingly, for each stage, the values of the first derivative of the dependence of the output signal of the sensor on the applied voltages are measured.
иand
Берут среднее арифметическое значение первых производных, полученных на каждой ступени нагружени Take the arithmetic average of the first derivatives obtained at each step of loading
Ш А и гW a and g
Ц (о) : ° .C (o): °.
2 2
Численное значение второй производной получают приближенно по известной формулеThe numerical value of the second derivative is obtained approximately according to the known formula
U() .U ().
Величину и знак искомых напр жений определ ют , реша систему уравугеиийThe magnitude and sign of the required stresses are determined by solving the system of equations.
U(.) ,U (.),
2С52С5
15АГ15AG
{)т () t
1о/(21o / (2
10 где нижнее уравнение вл етс результатом дифференцировани верхнего.10 where the lower equation is the result of differentiating the upper one.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782658971A SU731324A1 (en) | 1978-08-14 | 1978-08-14 | Method of measuring stresses in steel structure elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU782658971A SU731324A1 (en) | 1978-08-14 | 1978-08-14 | Method of measuring stresses in steel structure elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU731324A1 true SU731324A1 (en) | 1980-04-30 |
Family
ID=20783081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU782658971A SU731324A1 (en) | 1978-08-14 | 1978-08-14 | Method of measuring stresses in steel structure elements |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU731324A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2764001C1 (en) * | 2021-04-29 | 2022-01-12 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" | Method for controlling mechanical stresses in steel structures by the magnetoelastic method |
-
1978
- 1978-08-14 SU SU782658971A patent/SU731324A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2764001C1 (en) * | 2021-04-29 | 2022-01-12 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" | Method for controlling mechanical stresses in steel structures by the magnetoelastic method |
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