CN112526101A - Model test device and test method for measuring dynamic parameters of rolling stones - Google Patents
Model test device and test method for measuring dynamic parameters of rolling stones Download PDFInfo
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- 238000005096 rolling process Methods 0.000 title claims abstract description 146
- 239000004575 stone Substances 0.000 title claims abstract description 132
- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims description 27
- 239000011435 rock Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000005381 potential energy Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000004088 simulation Methods 0.000 description 10
- 238000005457 optimization Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000013480 data collection Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 238000010276 construction Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
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- G01N33/24—Earth materials
Abstract
The utility model provides a measure model test device of stone tumbling dynamic parameter, is including the conveyer belt, first spout and the second spout that set gradually, and conveyer belt, first spout and second spout respectively are connected with a plurality of lift supporting components, and first spout and second spout all are connected with lift supporting components through rotating coupling assembling, and first spout and second spout respectively are connected with an angle measurement subassembly, and the side of first spout and/or second spout is provided with at least one high-speed camera. The invention provides a model test device and a test method for measuring dynamic parameters of a rolling stone, which are simple to operate and can simulate various motion states of the rolling stone.
Description
Technical Field
The invention relates to the technical field of rolling stone simulation, in particular to a model test device and a test method for measuring rolling stone dynamic parameters.
Background
Rock is a common geological disaster in mountainous areas and is widely distributed around the world. The high speed moving rolling stones are very disadvantageous to the infrastructure and the ongoing construction of the project. Rock fall disasters have motion characteristics such as high speed, high impact energy, high uncertainty. Along with the aggravation of damage degree of human engineering activities to the natural environment, the occurrence frequency and the intensity of the rock rolling disasters are increased, and especially in the western mountainous areas of China with high and steep slopes, high mountains and canyons, structural development and rock mass breakage, the damage of the rock rolling is particularly strong.
The main research methods for rolling stones are: the method comprises the following steps of field test, theoretical analysis, numerical simulation analysis, indoor model test analysis and the like. The field test is difficult to obtain, data is not easy to obtain, a large number of parameters are needed for theoretical analysis and numerical simulation, and the established model is relatively simple and easy to implement and has a large difference from the actual model, so that the indoor model test becomes a common method for researching the rolling stone disaster. The existing rolling stone motion model generally simulates the motion of the rolling stone on a variable-angle slope, and the speed change of the rolling stone before and after rolling or collision is recorded by a high-speed camera, so that the coefficient of restitution of the rolling stone is calculated. However, the existing model device for researching the movement characteristics of the rolling stones has certain limitations, for example, an accurate and effective rolling stone releasing device is lacked, the actual rolling stones always have certain initial speed when in occurrence, the rolling stones in the rolling stone disasters caused by earthquakes or artificial activities often have higher initial speed, and the existing rolling stone model cannot well simulate the situation. Therefore, it is urgently needed to design a rolling stone test model which can meet the actual requirements.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the model test device and the test method for measuring the dynamic parameters of the rolling stones, which are simple to operate and can simulate various motion states of the rolling stones.
In order to achieve the purpose, the invention adopts the specific scheme that: the utility model provides a measure model test device of stone tumbling dynamic parameter, is including the conveyer belt, first spout and the second spout that set gradually, and conveyer belt, first spout and second spout respectively are connected with a plurality of lift supporting components, and first spout and second spout all are connected with lift supporting components through rotating coupling assembling, and first spout and second spout respectively are connected with an angle measurement subassembly, and the side of first spout and/or second spout is provided with at least one high-speed camera.
And as the further optimization of the model test device for measuring the dynamic parameters of the rolling stones: the lifting support component comprises a sleeve which is vertically arranged and has an upward opening, a travelling wheel is connected to the bottom of the sleeve, a first tightening bolt is arranged on the side of the sleeve in a penetrating manner, a lifting rod is arranged in the sleeve in a telescopic manner, and the extending end of the lifting rod is fixedly connected with the conveyor belt or is connected with the rotating connection component.
And as the further optimization of the model test device for measuring the dynamic parameters of the rolling stones: the rotation connecting assembly comprises two connecting plates fixedly connected with the bottom of the first sliding groove or the bottom of the second sliding groove, a connecting bolt penetrates between the two connecting plates, and the lifting rod stretches into the space between the two connecting plates and penetrates through the lifting rod through the connecting bolt.
And as the further optimization of the model test device for measuring the dynamic parameters of the rolling stones: the connecting rod is arranged in the middle of one end of the second sliding groove in a penetrating mode, the first sliding groove is fixedly connected with two extending portions, and the two extending portions are respectively movably sleeved at two ends of the connecting rod.
And as the further optimization of the model test device for measuring the dynamic parameters of the rolling stones: the angle measuring assembly comprises a fixed disc fixedly connected with the first sliding groove or the second sliding groove, the fixed disc is perpendicular to the first sliding groove or the second sliding groove, angle scales are arranged on the fixed disc, the center of the fixed disc is rotatably connected with a swinging rod, and the swinging rod is fixedly connected with a heavy hammer.
And as the further optimization of the model test device for measuring the dynamic parameters of the rolling stones: the dorsal part fixedly connected with of first spout a plurality of box bodys wear to be equipped with the tight bolt in second top on the box body, can dismantle in the box body and be provided with the magnetic unit, magnetic unit magnetic adsorption has the obstacle model, and the obstacle model sets up in first spout.
And as the further optimization of the model test device for measuring the dynamic parameters of the rolling stones: the top of conveyer belt is provided with angle adjusting part, and angle adjusting part is connected with the conveyer belt including two perpendicular boards that set up side by side, the lower extreme of perpendicular board the lift supporting component fixed connection, fixedly connected with horizontal plate between the upper end of two perpendicular boards wears to be equipped with the axis of rotation on the horizontal plate, the one end fixedly connected with knob of axis of rotation, and the knob conveyer belt dorsad, two outer one end fixedly connected with deflector that are parallel to each other of axis of rotation, and the deflector is perpendicular with the conveyer belt.
A test method of a model test device for measuring rolling stone dynamic parameters comprises the following steps:
s1, preparing a plurality of rolling stone models;
s2, adjusting the height of the conveyor belt by using the lifting support assembly to enable the conveyor belt to be higher than the first chute, and adjusting the speed of the conveyor belt;
s3, paving slope body materials in the first sliding groove and the second sliding groove;
s4, adjusting the inclination angles of the first sliding groove and the second sliding groove by using the lifting support assembly and the angle measuring assembly;
s5, the rolling stone models are put on a conveyor belt one by one, the conveyor belt throws the rolling stone models out and then sequentially passes through a first chute and a second chute, and the high-speed camera shoots the rolling stone models;
s6, adjusting the height of the conveyor belt by using the lifting support assembly to enable the conveyor belt to be flush with the upper end of the first chute;
s7, repeating S5;
and S8, calculating the collision recovery coefficient of the rolling stones and the rolling recovery coefficient of the rolling stones.
Further optimization of the test method of the model test device for measuring the dynamic parameters of the rolling stones: in S1, the rolling stone models are divided into three groups, the first group of rolling stone models are made of the same material and have different diameters, the second group of rolling stone models are made of the same material and have different masses, and the third group of rolling stone models are made of the same mass and have different shapes.
In a test method S8 of the model test device for measuring a rolling stone dynamic parameter, the rolling stone collision recovery coefficient includes a rolling stone normal collision recovery coefficient and a rolling stone tangential collision recovery coefficient, wherein a calculation method of the rolling stone normal collision recovery coefficient is as follows:
wherein enCoefficient of normal impact recovery for rolling stones, Vn1Is the normal velocity V of the roller stone model after collision and reboundnThe normal impact speed of the rolling stone model before collision;
the calculation method of the tangential collision recovery coefficient of the rock rolling comprises the following steps:
the method for calculating the rolling recovery coefficient of the rock rolling comprises the following steps:
wherein v is0、vtRespectively the rolling speed of the rolling stone model,
representing the initial kinetic energy of the rolling stone model,
representing the end position kinetic energy of the rolling stone model; mgh is the variation of potential energy in rolling of the rock model.
Has the advantages that: the rock rolling device can perform simulation tests on two conditions that the rock rolling falls onto the slope surface from the mother rock and falls onto the slope surface from the mother rock, and the rotating connecting assembly is matched with the lifting support assembly, so that the connecting point between the lifting support assembly and the sliding chute is not required to be changed when the lifting support assembly is used for adjusting the first sliding chute and the second sliding chute, and the adjusting operation is simplified. The angle measurement assembly can conveniently measure the inclination angles of the first sliding groove and the second sliding groove so as to perform simulation tests on slopes with different inclination angles.
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 first runner and the second runner;
FIG. 3 is a schematic structural view of the elevation support assembly and the rotation connection assembly;
FIG. 4 is a schematic structural view of an angle measurement assembly;
FIG. 5 is a schematic diagram of a simulated obstacle assembly;
fig. 6 is a schematic structural view of the angle adjusting assembly.
Reference numerals: 1-rock model, 2-conveyor belt, 3-lifting support component, 4-first chute, 5-angle measurement component, 6-second chute, 7-rotation connection component, 8-high speed camera, 9-extension part, 10-connecting rod, 11-walking wheel, 12-sleeve, 13-lifting rod, 14-first puller bolt, 15-connecting plate, 16-connecting bolt, 17-fixed plate, 18-swing rod, 19-angle scale, 20-weight, 21-obstacle model, 211-sensor, 212-baffle, 213-data collection device, 214-computer, 22-magnetic unit, 23-box, 24-second puller bolt, 25-vertical plate, 26-horizontal plate, 27-knob, 28-rotating shaft, 29-guide plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, a model test device for measuring dynamic parameters of rolling stones comprises a conveyor belt 2, a first chute 4 and a second chute 6 which are sequentially arranged, the conveyor belt 2, the first chute 4 and the second chute 6 are respectively connected with a plurality of lifting support components 3, the first chute 4 and the second chute 6 are both connected with the lifting support components 3 through a rotating connection component 7, the first chute 4 and the second chute 6 are respectively connected with an angle measurement component 5, and at least one high-speed camera 8 is arranged on the side of the first chute 4 and/or the second chute 6.
In the invention, a conveyor belt 2 is used as an initial power device, the rolling stone model 1 is driven to move during a test, initial kinetic energy is endowed to the rolling stone model 1, the rolling stone model 1 enters a first sliding groove 4 after being separated from the conveyor belt 2, then sequentially rolls along the first sliding groove 4 and a second sliding groove 6, finally leaves the second sliding groove 6, a high-speed camera 8 shoots the rolling stone model 1 in the rolling process, data such as the speed and the track of the rolling stone model 1 can be calculated through the image of the rolling stone model 1, and the recovery coefficient of the rolling stone model 1 is further calculated. The lifting support component 3 can adjust the heights and angles of the conveyor belt 2, the first chute 4 and the second chute 6, according to the height difference between the conveyor belt 2 and the first chute 4, the simulation test can be performed on two conditions that the rolling stones roll down from the mother rock to the slope surface and fall from the mother rock to the slope surface, the rotating connection component 7 is matched with the lifting support component 3, the connection point between the lifting support component 3 and the chute is not required to be changed when the lifting support component 3 is used for adjusting the first chute 4 and the second chute 6, and the adjusting operation is simplified. The angle measuring component 5 can conveniently measure the inclination angles of the first sliding chute 4 and the second sliding chute 6 so as to perform simulation tests on slopes with different inclination angles.
The specific structure of the lifting support component 3 is as follows: the lifting support component 3 comprises a sleeve 12 which is vertically arranged and has an upward opening, a walking wheel 11 is connected to the bottom of the sleeve 12, a first tightening bolt 14 is arranged on the side of the sleeve 12 in a penetrating mode, a lifting rod 13 is arranged in the sleeve 12 in a telescopic mode, and the extending end of the lifting rod 13 is fixedly connected with the conveyor belt 2 or connected with the rotating connection component 7. When the inclination of first spout 4 and second spout 6 changes, the distance between a plurality of lift supporting component 3 lower extremes that correspond to connect can change, and walking wheel 4 can realize only need adjusting lift supporting component 3 height, need not to carry out the effect of adjusting lift supporting component 3's upper end and lower extreme with the cooperation of rotation coupling assembling 7, has further simplified and has adjusted the operation to first spout 4 and second spout 6. In addition, the lifting rod 13 is tightly jacked to the inner wall of the sleeve 12 through the first jacking bolt 14, the height adjusting process of the lifting support component 3 is completed, and the lifting support component is simple and fast.
The specific structure of the rotating connecting assembly 7 is as follows: the rotating connection assembly 7 comprises two connection plates 15 fixedly connected with the bottom of the first sliding chute 4 or the bottom of the second sliding chute 6, a connection bolt 16 penetrates between the two connection plates 15, and the lifting rod 13 extends between the two connection plates 15 and the connection bolt 16 penetrates through the lifting rod 13. Because the rotation range of the lifting support component 3 relative to the first sliding chute 4 or the second sliding chute 6 is limited and not free in the adjusting process of the first sliding chute 4 and the second sliding chute 6, a device with complex structure and higher cost such as a universal joint is not needed, and the structure of matching the two connecting plates 15 and the connecting bolts 16 is simpler.
In order to enable the first sliding groove 4 and the second sliding groove 6 to simulate more slope angles, and the condition that the test result is influenced by the fact that the roller stone model 1 cannot jump between the first sliding groove 4 and the second sliding groove 6 is adopted, a connecting rod 10 is arranged in the middle of one end of the second sliding groove 6 in a penetrating mode, the first sliding groove 4 is fixedly connected with two extending portions 9, and the two extending portions 9 are respectively movably sleeved at two ends of the connecting rod 10.
The specific structure of the angle measuring assembly 5 is as follows: the angle measuring component 5 comprises a fixed disc 17 fixedly connected with the first sliding groove 4 or the second sliding groove 6, the fixed disc 17 is perpendicular to the first sliding groove 4 or the second sliding groove 6, angle scales 19 are arranged on the fixed disc 17, a swing rod 18 is rotatably connected at the center of the fixed disc 17, and a heavy hammer 20 is fixedly connected with the swing rod 18. Under the action of the weight 20, the swing rod 18 extends vertically and downwards all the time, and in the adjusting process of the first sliding chute 4 and the second sliding chute 6, the fixed disk 17 can synchronously rotate along with the first sliding chute 4 or the second sliding chute 6, at the moment, the relative position of the swing rod 18 and the fixed disk 17 changes, and the position of the angle scale 19 shielded by the swing rod 18 also changes, so that the angle of the first sliding chute 4 or the second sliding chute 6 can be read out, and the angle can be measured in real time in the adjusting process, so that the device is convenient and fast.
Considering that in the actual situation, a plurality of obstacles which can affect the rolling of the rolling stones may exist on the slope surface, the obstacle simulation component is further arranged, and specifically comprises a plurality of box bodies 23 fixedly connected to the back side of the first sliding chute 4, a second tightening bolt 24 penetrates through the box bodies 23, magnetic units 22 are detachably arranged in the box bodies 23, obstacle models 21 are magnetically adsorbed by the magnetic units 22, the obstacle models 21 are arranged in the first sliding chute 4, a plurality of impact force sensors 2101 which are uniformly distributed are arranged on the surfaces of the obstacle models 21, a baffle 2102 is arranged in front of the impact force sensors 2101, the impact force sensors 2101 are connected with a data collection device 2103, and the data collection device 2103 is connected with a computer 2104. After the position where the obstacle needs to be arranged is selected, the obstacle model 21 is placed at the position corresponding to the first sliding chute 4, then the magnetic unit 22 is installed in the box body 23 corresponding to the obstacle model 21 and locked by the second tightening bolt 24, the obstacle model 21 is absorbed in the first sliding chute 4 by the magnetic unit 22, and therefore the obstacle is simulated by the obstacle model 21, and the obstacle simulation device has higher simulation capability. According to the actual situation, the magnetic unit 22 can be selected from a permanent magnet or an electromagnet, and the obstacle model 21 is made of iron material. The impact force sensor 2101 is used to detect the impact force when the rolling stone model 1 impacts on the obstacle model 21.
The invention also provides a test method of the model test device for measuring the dynamic parameters of the rolling stones, which comprises S1-S8.
S1, a plurality of rolling stone models 1 are prepared. In S1, all the rolling stone models 1 are divided into three groups, the first group of rolling stone models 1 are made of the same material and have different diameters, the second group of rolling stone models 1 are made of the same material and have different masses, and the third group of rolling stone models 1 are made of the same mass and have different shapes. The three groups of rolling stone models 1 can simulate various different rolling stone models 1, and the application range and the result accuracy of the invention are improved.
S2, adjusting the height of the conveyor belt 2 using the elevation support assembly 3 to make the conveyor belt 2 higher than the first chute 4, and adjusting the speed of the conveyor belt 2.
And S3, paving slope materials in the first sliding chute 4 and the second sliding chute 6. The slope material can be soil or sand and the like.
And S4, adjusting the inclination angles of the first sliding chute 4 and the second sliding chute 6 by using the lifting support assembly and the angle measuring assembly 5.
S5, the rolling stone models 1 are put on the conveyor belt 2 one by one, the conveyor belt 2 throws the rolling stone models 1 out and then sequentially passes through the first chute 4 and the second chute 6, and the high-speed camera 8 shoots the rolling stone models 1.
And S6, adjusting the height of the conveyor belt 2 by using the lifting support assembly 3 to enable the conveyor belt 2 to be flush with the upper end of the first chute 4.
And S7, repeating S5.
And S8, calculating the collision recovery coefficient of the rolling stones and the rolling recovery coefficient of the rolling stones. In S8, the rolling stone collision recovery coefficients include a rolling stone normal collision recovery coefficient and a rolling stone tangential collision recovery coefficient, wherein the rolling stone normal collision recovery coefficient is calculated by the following method:
the calculation method of the tangential collision recovery coefficient of the rock rolling comprises the following steps:
the method for calculating the rolling recovery coefficient of the rock rolling comprises the following steps:
wherein v is0、vtRespectively the speed of the rolling stone model 1 from beginning to end,
representing the initial kinetic energy of the rock model 1,
representing the kinetic energy of the last position of the rolling stone model 1; mgh is the variation of potential energy in rolling of the rock model 1.
In order to further study the impact force condition of the rolling stone finally impacting on the object, the method also comprises S9-S10.
S9, mounting an obstacle model, an impact force sensor and a data collection device.
And S10, putting the rolling stone models with the same shape and different qualities on a conveyor belt, and researching the influence of the weight and the speed of the rolling stone on the impact force under different incidence angles.
The value of the maximum impact force can be calculated using the following empirical formula:
in the formula: mEIs the buffer layer elastic modulus (KPa); m is the falling rock weight (kg); r is the equivalent sphere radius (m) of the falling rocks,
gamma is the density of falling rocks (kg/m)3) (ii) a H is the falling height (m) of the falling rocks.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a measure model test device of stone rolling power parameter which characterized in that: including conveyer belt (2) that sets gradually, first spout (4) and second spout (6), conveyer belt (2), first spout (4) and second spout (6) respectively are connected with a plurality of lift supporting component (3), and first spout (4) and second spout (6) all are connected with lift supporting component (3) through rotating coupling assembling (7), first spout (4) and second spout (6) respectively are connected with an angle measuring component (5), the side of first spout (4) and/or second spout (6) is provided with at least one high-speed camera (8).
2. A model test apparatus for measuring rolling stone dynamic parameters as defined in claim 1, wherein: lifting support subassembly (3) are including setting up perpendicularly and opening ascending sleeve (12), and the bottom of sleeve (12) is connected with walking wheel (11), and first puller bolt (14) are worn to be equipped with by the lateral part of sleeve (12), and flexible in sleeve (12) is provided with lifter (13), the end that stretches out of lifter (13) with conveyer belt (2) fixed connection or with rotation coupling assembling (7) are connected.
3. A model test apparatus for measuring rolling stone dynamic parameters as defined in claim 2, wherein: rotate coupling assembling (7) include two with the bottom of first spout (4) perhaps bottom fixed connection's of second spout (6) connecting plate (15), wear to be equipped with connecting bolt (16) between two connecting plates (15), lifter (13) stretch into between two connecting plates (15) and connecting bolt (16) pass lifter (13).
4. A model test apparatus for measuring rolling stone dynamic parameters as defined in claim 1, wherein: the middle part of one end of the second sliding groove (6) is provided with a connecting rod (10) in a penetrating mode, the first sliding groove (4) is fixedly connected with two extending parts (9), and the two extending parts (9) are respectively movably sleeved at two ends of the connecting rod (10).
5. A model test apparatus for measuring rolling stone dynamic parameters as defined in claim 1, wherein: the angle measuring assembly (5) comprises a fixed disc (17) fixedly connected with the first sliding groove (4) or the second sliding groove (6), the fixed disc (17) is perpendicular to the first sliding groove (4) or the second sliding groove (6), angle scales (19) are arranged on the fixed disc (17), a swing rod (18) is rotatably connected to the center of the fixed disc (17), and a heavy hammer (20) is fixedly connected to the swing rod (18).
6. A model test apparatus for measuring rolling stone dynamic parameters as defined in claim 1, wherein: dorsal part fixedly connected with a plurality of box bodys (23) of first spout (4), wear to be equipped with second puller bolt (24) on box body (23), can dismantle in box body (23) and be provided with magnetic unit (22), magnetic unit (22) magnetic adsorption has obstacle model (21), and obstacle model (21) set up in first spout (4).
7. A model test apparatus for measuring rolling stone dynamic parameters as defined in claim 1, wherein: the top of conveyer belt (2) is provided with angle adjusting part, and angle adjusting part is including two vertical plate (25) that set up side by side, and the lower extreme and the conveyer belt (2) of vertical plate (25) are connected lift supporting component (3) fixed connection, fixedly connected with horizontal plate (26) between the upper end of two vertical plate (25), wears to be equipped with axis of rotation (28) on horizontal plate (26), and the one end fixedly connected with knob (27) of axis of rotation (28), and knob (27) are conveyer belt (2) dorsad, two outer one end fixedly connected with two deflector (29) that are parallel to each other of axis of rotation (28), and deflector (29) are perpendicular with conveyer belt (2).
8. The test method of a model test apparatus for measuring a dynamic parameter of a rolling stone of claim 1, wherein: the method comprises the following steps:
s1, preparing a plurality of rolling stone models (1);
s2, adjusting the height of the conveyor belt (2) by using the lifting support assembly (3) to enable the conveyor belt (2) to be higher than the first chute (4), and adjusting the speed of the conveyor belt (2);
s3, paving slope materials in the first sliding groove (4) and the second sliding groove (6);
s4, adjusting the inclination angles of the first sliding chute (4) and the second sliding chute (6) by using the lifting support component and the angle measuring component (5);
s5, putting the rolling stone models (1) on a conveyor belt (2) one by one, throwing the rolling stone models (1) out by the conveyor belt (2) and enabling the rolling stone models to pass through a first chute (4) and a second chute (6) in sequence, and shooting the rolling stone models (1) by a high-speed camera (8);
s6, adjusting the height of the conveyor belt (2) by using the lifting support component (3) to enable the conveyor belt (2) to be flush with the upper end of the first chute (4);
s7, repeating S5;
and S8, calculating the collision recovery coefficient of the rolling stones and the rolling recovery coefficient of the rolling stones.
9. The method of claim 8, wherein: in the step S1, all the rolling stone models (1) are divided into three groups, the first group of rolling stone models (1) are made of the same material and have different diameters, the second group of rolling stone models (1) are made of the same material and have different masses, and the third group of rolling stone models (1) are made of the same mass and have different shapes.
10. The method of claim 8, wherein: in S8, the rolling stone collision recovery coefficients include a rolling stone normal collision recovery coefficient and a rolling stone tangential collision recovery coefficient, wherein the rolling stone normal collision recovery coefficient is calculated by the following method:
wherein enCoefficient of normal impact recovery for rolling stones, Vn1Is the normal speed V of the roller stone model (1) after collision reboundnThe normal impact speed of the rolling stone model (1) before collision;
the calculation method of the tangential collision recovery coefficient of the rock rolling comprises the following steps:
wherein etFor coefficient of restitution of rolling stone by tangential collision, Vt1Is the tangential velocity V of the roller stone model (1) after collision reboundtThe tangential impact speed of the rolling stone model (1) before collision;
the method for calculating the rolling recovery coefficient of the rock rolling comprises the following steps:
wherein v is0、vtRespectively the speed of the rolling stone model (1) from beginning to end,
representing the initial kinetic energy of the rolling stone model (1),
representing the kinetic energy of the last position of the rolling stone model (1); mgh is the variation of potential energy in rolling of the rolling stone model (1).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267310A (en) * | 2021-05-17 | 2021-08-17 | 湖北大学 | Impact test analysis method and system for power transmission line tower |
| CN114636539A (en) * | 2022-03-14 | 2022-06-17 | 重庆科技学院 | Pier rockfall impact device |
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