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Teaching experiment device making force method visualized

An experimental device and intuitive technology, applied in teaching models, educational appliances, instruments, etc., can solve problems such as insufficient understanding and doubts about related theories, and achieve the effect of small errors

Inactive Publication Date: 2016-01-13
DALIAN UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the teaching methods of structural mechanics in colleges and universities are mainly theoretical teaching. Due to the lack of experimental verification of related theories, it is inevitable that some students will not have a deep understanding of the relevant theories, and even have doubts about the relevant theories.

Method used

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  • Teaching experiment device making force method visualized
  • Teaching experiment device making force method visualized
  • Teaching experiment device making force method visualized

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: A force method experiment based on an inverted "L"-shaped statically indeterminate rigid frame structure with one end fixed and the other free

[0033] figure 2 It is the statically determinate basic structure diagram for the load of the force method teaching experimental device alone, figure 2 The structure is installed in the figure 1 the basis of the structure. One end of the horizontal stay wire displacement sensor 17a and the vertical stay wire displacement sensor 17b is fixed on the reaction force frame 1, and the other end is connected to the hinge point plate 5 by a stay wire. The worm gear loading device is connected to the vertical hollow square rod 3a to apply load, and at the same time, the corresponding displacement values ​​are measured by the horizontal cable displacement sensor 17a and the vertical cable displacement sensor 17b.

[0034] image 3 The basic structure diagram of the vertical reaction force acting alone on the static indete...

Embodiment 2

[0036] Example 2: Force method experiment with an inverted "L"-shaped primary statically indeterminate rigid frame structure with one end fixed and the other constrained vertical displacement as the basic structure

[0037] Figure 5 The load of the force method teaching experiment device acts on the primary statically indeterminate basic structure diagram alone. The rigid frame structure is formed by connecting two mutually perpendicular vertical hollow square rods 3a and transverse hollow square rods 3b through rigid joint plates 4a. One end of the vertical hollow square rod 3a is connected to the rigid joint plate 4a with a groove through a bolt; Connected; one end of the horizontal hollow square rod 3b is connected with the rigid joint plate 4a with a groove through a bolt; Connected hinges. The movable hinge support is installed on the box-shaped platform 16 and fixed on the lower beam of the reaction frame 1 . The horizontal stay wire displacement sensor 17a is fixed...

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Abstract

The invention provides a teaching experiment device making a force method visualized. The device comprises a rigid frame structure, a loading device, a support and constraint device and a measurement device. The rigid frame structure is formed by connecting vertical and transverse two hollow square rods, which are mutually perpendicular, through a rigid joint disc. The loading device comprises a worm and worm wheel loading device and a weight loading device, and is used for realizing loading of the rigid frame structure. The support and constraint device comprises a constraint support of the rigid frame structure and a counterforce frame, wherein the constraint support of the rigid frame structure comprises a fixation support and a hinge support, and the counterforce frame is formed by a counterforce rack and a base. The measurement device comprises a force sensor, a strain gauge and stay wire displacement sensors. The device integrates a structural mechanics experimental model, the loading device and the measurement device, and the experimental model is flexible and variable; different branch experimental models can be assembled according to the needs of the experiment content, and force method experiments with a plurality of methods can be carried out; and the results obtained through the various methods can be compared mutually and compared with the theoretical result conveniently.

Description

technical field [0001] The invention belongs to the field of structural mechanics experiment teaching for civil engineering specialty, and relates to a teaching experiment device which visualizes force method. Background technique [0002] Structural mechanics is a compulsory subject for civil engineering majors in colleges and universities. The force method is the basic method of structural mechanics to solve the internal force and displacement of statically indeterminate structures under static loads. [0003] The statically indeterminate structure is different from the statically indeterminate structure in calculation. The internal force of the hyperstatically indeterminate structure cannot be obtained from the static equilibrium condition alone, and the deformation coordination condition must be considered at the same time. For the convenience of calculating problems, a part of all the unknowns of the hyperstatically indeterminate structure is often selected as the basic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/10
CPCG09B23/10
Inventor 陈廷国吴江龙孙良君胡乔元李映雪
Owner DALIAN UNIV OF TECH
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