CN211604512U - Teaching device for demonstrating seismic waveform and damage degree - Google Patents
Teaching device for demonstrating seismic waveform and damage degree Download PDFInfo
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- CN211604512U CN211604512U CN202020139081.4U CN202020139081U CN211604512U CN 211604512 U CN211604512 U CN 211604512U CN 202020139081 U CN202020139081 U CN 202020139081U CN 211604512 U CN211604512 U CN 211604512U
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Abstract
The utility model relates to a teaching device of demonstration earthquake wave form and destruction degree, the device include longitudinal wave switch, vibration level adjust knob, switch, longitudinal wave spring, counter weight lead button, extension spring, simulation building, simulation ground, metal ring, bracing piece, rubber hose, transverse wave switch, vibration source box, mounting flange and base. A fixed vibration source box body and a fixed flange are arranged on the base; the top ends of the support rods above the vibration source box body are provided with metal rings, the simulation ground is hung through extension springs, and a simulation building is arranged on the simulation ground. Two ends of the longitudinal wave spring and the rubber hose are respectively fixed between the vibration source box body and the simulated ground, and a counterweight lead grain is arranged in the rubber hose; the panel of the vibration source box body is provided with a power switch. Two direct current gear motors, swing arms, connecting rods, shaft rods and box-type bearings are arranged in the vibration source box body. The device has the advantages of simple structure, reasonable design, convenient operation, stable and reliable performance and very obvious application effect.
Description
Technical Field
The utility model relates to a teaching device of demonstration earthquake, in particular to teaching device of demonstration earthquake wave form and destruction degree.
Background
Among various natural disasters, an earthquake is the most destructive one, and seismic waves generated during an earthquake carry enormous energy, which is one of the main causes of destruction. Seismic waves are classified into three types according to propagation modes: longitudinal waves, transverse waves, and surface waves. Longitudinal waves are propulsion waves, which reach the middle of the earthquake first, and are also called P-waves, and are less destructive. The shear wave is the shear wave, the second one to the epicenter, also called S-wave, which is highly destructive. The surface wave, also called L wave, is a mixed wave generated by excitation of longitudinal and transverse waves after meeting on the ground surface, and has a large wavelength and a strong amplitude, and can only propagate along the ground surface, which is a main factor causing strong destruction of buildings.
A wave in which the vibration direction of a mass point in a medium and the propagation direction of the wave are parallel to each other is called a longitudinal wave. The longitudinal wave is characterized in that: the mass point of the medium is under the action of alternating tensile and compressive stress and generates telescopic deformation, and can be spread in solid, liquid and gas; the longitudinal wave has a propagation speed of 5-6 km/s, which can cause the ground to jump up and down.
A wave in which the vibration direction of a mass point in a medium is perpendicular to the propagation direction of the wave is called a transverse wave. The transverse wave is characterized in that: the mass point of the medium receives the alternating shearing stress action and generates shearing deformation which can only be spread in the solid; the transverse wave propagation speed is relatively slow, 3-4 kilometers per second, and the horizontal shaking of the ground can be caused.
At present, in colleges and universities and middle schools, instruments and equipment for demonstrating longitudinal waves are mature, and teaching instruments for demonstrating transverse waves, particularly combined with actual natural phenomena, are almost absent. In practical teaching, the transverse waves and longitudinal waves in mechanical waves are simply demonstrated to always show too simple and rigid contents, because the teaching aid is generally used for the purposes of analyzing formulas and emphasizing calculation, a teaching aid model is too ideal, and the teaching aid model is not closely related to related phenomena in daily life; therefore, the teaching aid cannot improve the learning interest of students well, and has not good effect on deepening the understanding of the students to the mechanical waves.
Mechanical vibration and mechanical waves are key chapters in college physics teaching, and the concept of mechanical waves is also a difficult point. How to help students build wave concepts and correctly master wave formation and wave rules is an old problem often encountered in the course of college physical teaching. In the past teaching process, most of the concepts of the transverse waves adopt model teaching aids, such as transverse wave and longitudinal wave demonstration instruments and the like to demonstrate teaching analysis, and the teaching aids only see the surface representation of simulated waves on the surface and cannot help students to link the representation forms and the propagation characteristics of the waves with common phenomena in the actual life.
In recent years, with the popularization and application of multimedia technology, many physical experiments including fluctuation experiments can be virtually simulated through simulation software, so that the method is really ideal, convenient and attractive, however, the method only can play a role in auxiliary teaching in college physical teaching, and students can be misled if the method is excessively dependent on and rendered, so that the physical experiments can be realized only on a computer. Such multimedia-based analog simulation can only be used as an aid or supplement. The physical science comes from life and practice, and neither theorem, axiom or law in the classical physics is summarized, concluded and perfected on the basis of a large number of experiments. Therefore, the demonstration instrument for physical experiment teaching must follow the principles of being visible, touchable, hand-moving and practical.
Therefore, it is one of the problems to be urgently solved by the technical staff in the field to provide a teaching device for demonstrating seismic waveform and destruction degree, which has reasonable structural design, stable and reliable performance and simple operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and is designed with a set of novel earthquake wave demonstration instrument by combining years of experimental teaching experience; the method mainly demonstrates the generation principle of transverse waves and longitudinal waves, the difference of propagation speeds, the magnitude of carried energy, the destruction degree of the transverse waves and the longitudinal waves in the earthquake and other phenomena; the teaching device for demonstrating the seismic waveform and the damage degree is reasonable in structural design, stable and reliable in performance and simple in operation.
In order to realize the purpose, the utility model adopts the technical scheme that: a teaching device for demonstrating seismic waveform and damage level, the device comprising: the device comprises a longitudinal wave switch, a vibration level adjusting knob, a power switch, a longitudinal wave spring, a counterweight lead particle, an extension spring, a simulation building, a simulation ground, a metal ring, a support rod, a rubber hose, a transverse wave switch, a vibration source box body, a fixed flange and a base;
the base is in a rectangular plate shape and is arranged at the bottom of the device in parallel, and a vibration source box body and a fixing flange for positioning four supporting rods are arranged on the base; the circle center positions of four fixed flanges are distributed in a rectangular shape, a vibration source box body is arranged in the middle of the upper surface of a base, and the top ends of supporting rods above the vibration source box body are suspended on a simulated ground through extension springs; the simulation building is arranged above the simulation ground; two ends of the longitudinal wave spring and two ends of the rubber hose are respectively fixed between the vibration source box body and the simulated ground; a balance weight lead particle is arranged in the rubber hose;
the vibration source box body is fixed at the center of the upper surface of the base, a power switch is arranged at the upper left corner of the front overlooking panel of the device, and the shaft lever is provided with openings corresponding to the panel and distributed at the middle position of the panel; the longitudinal wave switch, the transverse wave switch and the vibration level adjusting knob are respectively and correspondingly arranged at the lower part of the panel, the vibration level adjusting knob is positioned among the longitudinal wave switch, the transverse wave switch and the vibration level adjusting knob, and the longitudinal wave switch and the transverse wave switch are respectively positioned at two sides of the longitudinal wave switch and the transverse wave switch;
the vibration source box sets up and includes: the direct-current speed reduction motors, the swing arms, the connecting rods, the shaft rods and the box-type bearings are arranged on the two side plates; the direct current speed reduction motor is arranged in the vibration source box body, one end of the connecting rod is connected with the swing arm, the other end of the connecting rod is connected with the box type bearing and fixed on the vibration source box body and sleeved on the shaft lever, the swing arm fastened on a rotating shaft of the direct current speed reduction motor rotates along with the main current speed reduction motor to drive the connecting rod to move, the connecting rod drives the shaft lever to do reciprocating linear motion in the box type bearing, the connecting rod is placed in the vertical direction to serve as a longitudinal wave vibration source, and the connecting; the mounting holes arranged on the shaft lever are respectively connected with the longitudinal wave spring and the rubber hose;
the electrical components involved in the circuit of the device include: the device comprises a longitudinal wave switch, a power switch, a transverse wave switch, two direct current speed reducing motors and a variable voltage speed regulator; the power switch is a main power supply of the device, 220V alternating current is adjusted by the voltage transformation speed regulator to be changed into 0V-24V adjustable direct current, and the vibration level adjusting knob is arranged on a panel of the vibration source box body; two direct current speed reducing motors are arranged and connected with the positive pole and the negative pole of the 24V direct current and are respectively and correspondingly controlled by a longitudinal wave switch and a transverse wave switch.
The utility model has the advantages that:
(1) the device can demonstrate directly perceivedly that earthquake longitudinal wave arouses the ascending upper and lower vibrations phenomenon in the vertical direction in ground, simultaneously, can also see obvious longitudinal wave propagation and vertical standing wave phenomenon on the light spring of demonstration longitudinal wave, combines together physics phenomena such as this kind of natural phenomena of earthquake with longitudinal wave, vertical standing wave, more has interest, intuition.
(2) The rubber hose with the lead particles is used as a transverse wave vibration medium, and physical phenomena such as transverse wave waveforms, vibration characteristics, transverse standing waves and the like are perfectly demonstrated.
(3) The instrument can intuitively and perfectly demonstrate that the damage degrees of the earthquake longitudinal waves and the earthquake transverse waves to the building are different, namely the damage degree of the longitudinal waves to the building on the ground is smaller, and the damage degree of the transverse waves is larger.
(4) The device has small volume, light weight and convenient carrying and transportation, and can demonstrate some phenomena and characteristics about mechanical waves in a classroom; the reciprocating linear motion structure of the crank is used as a vibration source, and the reciprocating linear motion structure is simple in structure, firm, durable, low in cost and high in popularization.
(5) By adjusting the speed, when the vibration source vibrates, the number change of antinodes and nodes of the formed standing wave can be demonstrated on the longitudinal wave spring and the transverse wave rubber hose, and the relation between the propagation speed of the wave and the wavelength and the frequency can be explained.
In a word, the device has the advantages of simple structure, reasonable design, quick operation, visual demonstration, stable and reliable performance and very obvious application effect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the connection of the internal structure of the vibration source box of the present invention;
FIG. 3 is a schematic diagram of the connection of the circuit part of the present invention;
in the figure: 1 longitudinal wave switch, 2 magnitude of vibration adjust knob, 3 switch, 4 longitudinal wave springs, 5 counter weight lead buttons, 6 extension spring, 7 simulation buildings, 8 simulation ground, 9 metal ring, 10 bracing pieces, 11 rubber hose, 12 transverse wave switches, 13 vibration source boxes, 14 mounting flange, 15 bases, 16 direct current gear motor, 17 swing arms, 18 connecting rods, 19 axostylus axostyle, 20 box bearings, 21 mounting holes, 22 variable voltage speed regulators.
Detailed Description
The following detailed description of specific embodiments, structures and features according to the present invention will be made with reference to the accompanying drawings and preferred embodiments:
as shown in fig. 1, a teaching apparatus for demonstrating waveform and destruction degree of seismic waves, the apparatus comprising: the device comprises a longitudinal wave switch 1, a magnitude adjusting knob 2, a power switch 3, a longitudinal wave spring 4, a counterweight lead grain 5, an extension spring 6, a simulation building 7, a simulation ground 8, a metal ring 9, a support rod 10, a rubber hose 11, a transverse wave switch 12, a vibration source box 13, a fixing flange 14 and a base 15.
The base 15 is in the form of a rectangular plate, for example, a pine board having a length of 60cm, a width of 50cm and a thickness of 1.5cm is selected, and is located at the lowermost portion of the apparatus, which is in direct contact with the ground or other supporting surface, for fixing the vibration source case 13 and the fixing flange 14. Four parallel and vertical steel support rods 10 are fastened by a fixed flange 14 arranged on a base 15, the four axes of the support rods are distributed in a rectangular shape, the length of the support rods is 55cm, the width of the support rods is 45cm, the size design is convenient for installing a vibration source box body 13 in the middle of the base 15, the suspension of a simulated ground 8 above the device can be considered, the diameter of each support rod 10 is 1.9cm, and the length of each support rod is 140 cm; the length design not only meets the condition that the longitudinal wave spring 4 and the rubber hose 11 can generate obvious longitudinal wave and transverse wave waveform characteristics, but also does not cause the volume of the whole device to be overlarge. A three-ply board with the length of 35cm and the width of 25cm is used as a simulated ground 8, and four corners of the three-ply board are respectively suspended by four extension springs 6 with the length of 13cm and the diameter of 1.2 cm; the adopted three-ply board has certain hardness, is not easy to deform, and has the weight meeting the experimental requirements, because if the simulated ground 8 is too light, the vertical vibration or the horizontal swing is too violent and has no rule, the vertical wave spring 4 and the rubber hose 11 can not generate standing wave phenomenon or serious waveform distortion, and the teaching demonstration significance is lost; on the contrary, if the simulated ground 8 is too heavy, the longitudinal wave spring 4 and the rubber hose 11 cannot drive the vertical vibration and the horizontal shaking, and the influence of the longitudinal wave and the transverse wave on the ground damage degree cannot be demonstrated. The two ends of the longitudinal wave spring 4 and the two ends of the rubber hose 11 are respectively fixed between the vibration source box body 13 and the simulated ground 8, the distance between the two ends is 28cm so as to ensure that the longitudinal wave spring 4 and the simulated ground are not influenced mutually, the diameter of the longitudinal wave spring 4 is 5cm, the length of the longitudinal wave spring before stretching is 5cm, the stretching length in practical application is 110cm, the outer diameter of the rubber hose 11 is 4mm, the inner diameter of the rubber hose is 2.5mm, and the free; the diameter of the counterweight lead shot is 2mm, the mass is about 0.38g, and the counterweight lead shot 5 in the rubber hose 11 is filled and distributed; every 5cm of rubber hose 11 length is tied up the segmentation with the string, and every four sections from the top down are a set of, divide into five groups altogether, and every section intraductal counter weight lead button of every group 5 numbers (quality) homogeneous phase is the same, and the counter weight lead button 5 numbers in every group decrease two more down, and the rubber hose 11 quality that also decreases down more, just so can furthest reduce the influence of gravity to 11 centroids of whole rubber hose, make the transverse wave form that produces stable and accord with sinusoidal law. The vibration source box body 13 is fixed at the central position of the base, and has the length of 40cm, the width of 30cm and the height of 26 cm; the side selection material is the wooden plain noodles panel with the decorative pattern, and the panel selection material that is located the upside is white plastic-aluminum board, is located the device and openly overlooks the panel, and the upper left corner is ship type switch 3, and its mounted position is 5cm apart from panel left edge, and the top edge is 4cm, and the trompil size of vertical and transverse wave vibration source axostylus axostyle on the panel is aperture 1cm and length 6cm width 1cm respectively, and it distributes in the middle part position of panel. The ship-shaped longitudinal wave switch 1, the transverse wave switch 12 and the vibration level adjusting knob 2 are arranged on the lower portion of the panel respectively, the vibration level adjusting knob 2 is located among the three, and the longitudinal wave switch 1 and the transverse wave switch 12 are located on two sides of the panel respectively and are 11cm away from the panel, so that the operation is facilitated. The simulation building 7 is a building block with the length of 6cm, the width of 3cm and the thickness of 1.8cm or an object with the similar weight and size.
The top end of the support rod 10 is provided with a metal ring 9, the metal ring 9 is connected with one end of an extension spring 6, and the other end of the extension spring 6 is connected with a simulation ground 8 which is hung; the metal ring 9 can be replaced by a hook.
As shown in fig. 2, the vibration source case 13 is provided with: two direct current speed reducing motors 16, a swing arm 17, a connecting rod 18, a shaft rod 19 and a box type bearing 20; the two direct current speed reducing motors 16 have the following selection parameters: DC24V, 2000rpm, the frequency range of the rotating speed in this range can drive the crank to reciprocate linearly is: 0Hz-33Hz can cause the longitudinal wave spring 4 and the rubber hose 11 to generate longitudinal and transverse standing waves well in a reasonable range; the length of the aluminum alloy swing arm of the crank reciprocating structure is 2.5cm, so that the reciprocating stroke of the shaft lever is determined to be 5cm, and if the length of the swing arm is too short, the amplitude is too small, and the vibration phenomenon is not obvious; if the vibration source box body is too long, the amplitude of longitudinal and transverse waves is too large, the vibration is too violent, the waveform distortion is easily caused, and the volume of the vibration source box body is also enlarged along with the vibration source box body, so that the vibration source box body is too heavy. One end of the connecting rod 18 is connected with the swing arm 17, the other end of the connecting rod is connected with a hard steel shaft rod 19 with the diameter of 6cm and the length of 14cm, and a box-type bearing 20 with the inner diameter of 6cm is fixed on the vibration source box body 13 and sleeved on the shaft rod 19; in this way, the swing arm 17 fastened on the rotating shaft of the dc speed reducing motor 16 rotates with the motor to drive the connecting rod 18 to move, the connecting rod 18 drives the shaft rod 19 to make reciprocating linear motion in the box-type bearing 20, the vertical direction is used as a longitudinal wave vibration source, the horizontal direction is used as a transverse wave vibration source, and the mounting hole 21 arranged on the shaft rod 19 is respectively connected with the longitudinal wave spring 4 and the rubber hose 11, so that a vibration source for generating longitudinal waves and transverse waves is formed.
As shown in fig. 3, the electronic components involved in the circuitry of the device include: longitudinal wave switch 1, power switch 3, transverse wave switch 12, two DC speed reducing motors 16 and variable voltage speed regulator 22. The power switch 3 is a main power supply of the device, is connected to an alternating current 220V live wire, and is switched off to power off the whole device; 220V alternating current is adjusted by a variable voltage speed regulator 22 to be changed into 0V-24V adjustable direct current, a vibration level adjusting knob 2 is arranged on a panel of a vibration source box body 13, and two direct current speed reducing motors 16 are connected to the positive pole and the negative pole of the 24V direct current and are respectively controlled by a longitudinal wave switch 1 and a transverse wave switch 12.
The device is based on a stable base, and a vibration source box body and a supporting rod for constructing a simulated ground and a simulated building are reasonably arranged on the device; designing and adjusting a vibration source of a crank reciprocating linear structure based on control of a direct-current speed reducing motor; the vibration source is effectively connected with the simulated ground by utilizing a longitudinal wave spring and a rubber hose filled with a counterweight lead shot.
Firstly, designing a crank reciprocating linear structure as a vibration source of transverse waves and longitudinal waves, wherein the vibration source of the longitudinal waves is in a vertical direction and is used for driving vertical vibration of a longitudinal wave spring, and the vibration source of the transverse waves is in a horizontal direction and is used for driving horizontal swinging of a rubber hose; the speed-adjustable direct-current speed reduction motor is a power end of a crank reciprocating linear structure, and the period and the frequency of reciprocating motion can be adjusted, so that the characteristics of transverse waves and longitudinal waves can be displayed optimally.
And secondly, determining the volume of the vibration source box according to the size of a reciprocating linear structure of the crank as the vibration source, and determining the size of the base according to the volume of the vibration source box.
Meanwhile, four same support rods are fixed at four corners of the base respectively by fixing flanges, and the support rods are parallel to each other and are in a vertical state; the top ends of the four support rods are provided with metal rings or hooks for hanging and connecting one end of an extension spring of the simulation ground, and the other end of the extension spring is connected with four corners of the simulation ground, so that the simulation ground can freely vibrate up and down and shake left and right.
And the distance between the vibration source box body and the simulated ground and the height of the supporting rod are determined by combining the material characteristics of the selected longitudinal wave spring and the rubber hose, the generation mechanism of mechanical waves such as longitudinal waves and transverse waves and the standing wave characteristics generated by the longitudinal waves and the transverse waves, so that the optimal demonstration effect is achieved.
Finally, the design of the shell of the vibration source box body, the internal circuit and the panel of the vibration source box body and the installation of a switch, a key and a knob on the panel are completed; the following functions are finally completed:
(1) independently demonstrating the damage degree of longitudinal wave waveforms, longitudinal standing waves and longitudinal waves to the simulated ground;
(2) independently demonstrating the damage degree of the transverse wave waveform, the transverse standing wave and the transverse wave to the simulated ground;
(3) simultaneously demonstrating the damage degree of longitudinal wave, transverse wave waveform and standing wave to the simulated ground respectively by comparing the longitudinal wave, the transverse wave waveform and the standing wave;
(4) and (3) adjusting the vibration frequency, and observing the waveform change of the transverse waves and the longitudinal waves and the influence on the simulated ground damage degree.
The utility model discloses the theory of operation does: the device utilizes a crank reciprocating linear motion structure as a vibration source of longitudinal waves and transverse waves, and drives a longitudinal wave spring and a rubber hose added with lead shot counterweight to respectively generate vertical and horizontal motion, so as to generate longitudinal waves, longitudinal standing waves, transverse waves and transverse standing waves; the spring generating longitudinal waves can cause the vertical vibration of the simulated ground, and the rubber hose generating transverse waves can cause the horizontal shaking of the simulated ground; vertical vibration caused by longitudinal waves is less destructive to a simulated building on the simulated ground, while lateral vibration caused by transverse waves is greater destructive to a simulated building on the simulated ground.
The utility model discloses application: placing the device on a horizontal ground, and placing a simulated building at about the center of the simulated ground; turning on a power switch, turning on a longitudinal wave switch, slowly and clockwise adjusting a vibration level adjusting knob to increase the vibration frequency, and observing the vibration starting process of a longitudinal wave spring and the states of a simulated ground and a simulated building; and continuously adjusting the vibration level adjusting knob to increase the vibration frequency, observing the change rule of an antinode and a node of the generated longitudinal standing wave, and observing the damage degree of the vertical vibration phenomenon and the longitudinal wave of the simulated ground to the simulated building: vibrating up and down with small amplitude; opening the transverse wave switch, observing the transverse wave waveform and the transverse standing wave phenomenon, and observing the left-right shaking phenomenon of the simulated ground and the damage degree of the transverse wave to the simulated building: sway from side to side and collapse quickly; and the vibration level adjusting knob is rotated anticlockwise to the minimum, and the longitudinal wave switch, the transverse wave switch and the power switch are respectively turned off.
The above detailed description of the teaching apparatus for demonstrating seismic waveform and damage level with reference to the embodiments is illustrative and not restrictive; therefore, changes and modifications can be made without departing from the general inventive concept and should fall within the scope of the appended claims.
Claims (4)
1. A teaching device for demonstrating seismic waveform and damage level, the device comprising: the device comprises a longitudinal wave switch, a vibration level adjusting knob, a power switch, a longitudinal wave spring, a counterweight lead particle, an extension spring, a simulation building, a simulation ground, a metal ring, a support rod, a rubber hose, a transverse wave switch, a vibration source box body, a fixed flange and a base;
the base is in a rectangular plate shape and is arranged at the bottom of the device in parallel, and a vibration source box body and a fixing flange for positioning four supporting rods are arranged on the base; the circle center positions of four fixed flanges are distributed in a rectangular shape, a vibration source box body is arranged in the middle of the upper surface of a base, and the top ends of supporting rods above the vibration source box body are suspended on a simulated ground through extension springs; the simulation building is arranged above the simulation ground; two ends of the longitudinal wave spring and two ends of the rubber hose are respectively fixed between the vibration source box body and the simulated ground; a balance weight lead particle is arranged in the rubber hose;
the vibration source box sets up and includes: the direct-current speed reduction motors, the swing arms, the connecting rods, the shaft rods and the box-type bearings are arranged on the two side plates; the vibration source box body is fixed at the center of the upper surface of the base, a power switch is arranged at the upper left corner of the front overlooking panel of the device, and the shaft lever is provided with openings corresponding to the panel and distributed at the middle position of the panel; the longitudinal wave switch, the transverse wave switch and the vibration level adjusting knob are respectively and correspondingly arranged at the lower part of the panel, the vibration level adjusting knob is positioned among the longitudinal wave switch, the transverse wave switch and the vibration level adjusting knob, and the longitudinal wave switch and the transverse wave switch are respectively positioned at two sides of the longitudinal wave switch and the transverse wave switch;
the direct current speed reduction motor is arranged in the vibration source box body, one end of the connecting rod is connected with the swing arm, the other end of the connecting rod is connected with the box type bearing and fixed on the vibration source box body and sleeved on the shaft lever, the swing arm fastened on a rotating shaft of the direct current speed reduction motor rotates along with the main current speed reduction motor to drive the connecting rod to move, the connecting rod drives the shaft lever to do reciprocating linear motion in the box type bearing, the connecting rod is placed in the vertical direction to serve as a longitudinal wave vibration source, and the connecting; the mounting holes arranged on the shaft lever are respectively connected with the longitudinal wave spring and the rubber hose;
the electrical components involved in the circuit of the device include: the device comprises a longitudinal wave switch, a power switch, a transverse wave switch, two direct current speed reducing motors and a variable voltage speed regulator; the power switch is a main power supply of the device, 220V alternating current is adjusted by the voltage transformation speed regulator to be changed into 0V-24V adjustable direct current, and the vibration level adjusting knob is arranged on a panel of the vibration source box body; two direct current speed reducing motors are arranged and connected with the positive pole and the negative pole of the 24V direct current and are respectively and correspondingly controlled by a longitudinal wave switch and a transverse wave switch.
2. A teaching device for demonstrating seismic waveform and damage according to claim 1, wherein said supporting rods are four parallel and vertical metal supporting rods, correspondingly disposed at four corners of said base and fastened by fixing flanges mounted on said base.
3. A teaching device for demonstrating seismic waveform and damage degree as claimed in claim 1, wherein said support rod has a metal ring or hook at one end, and is connected with one end of an extension spring through the metal ring or hook, and the other end of the extension spring is connected with a simulated ground installed in a suspension.
4. The teaching device for demonstrating seismic waveform and damage degree according to claim 1, wherein the length of said rubber hose is divided into five groups by fastening with a string every 5cm, each four segments from top to bottom are grouped into one group, the number or mass of the weighted lead particles in each group is the same, the number of the weighted lead particles in each group decreases by two from bottom to bottom, i.e. the mass of the rubber hose decreases from bottom to bottom, so as to reduce the influence of gravity on the center of mass of the whole rubber hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020139081.4U CN211604512U (en) | 2020-01-21 | 2020-01-21 | Teaching device for demonstrating seismic waveform and damage degree |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020139081.4U CN211604512U (en) | 2020-01-21 | 2020-01-21 | Teaching device for demonstrating seismic waveform and damage degree |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113192407A (en) * | 2021-04-30 | 2021-07-30 | 黑龙江省科学技术馆 | Be applied to earthquake early warning device that public safety flows science popularization show |
| CN113324719A (en) * | 2021-05-24 | 2021-08-31 | 机械工业第九设计研究院有限公司 | Simulation device and method for simulating anti-seismic performance of building in complex environment |
-
2020
- 2020-01-21 CN CN202020139081.4U patent/CN211604512U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113192407A (en) * | 2021-04-30 | 2021-07-30 | 黑龙江省科学技术馆 | Be applied to earthquake early warning device that public safety flows science popularization show |
| CN113324719A (en) * | 2021-05-24 | 2021-08-31 | 机械工业第九设计研究院有限公司 | Simulation device and method for simulating anti-seismic performance of building in complex environment |
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