CN115096995B - Shaft-connected energy-consumption rod piece structure with monitoring and sounding early warning functions - Google Patents
Shaft-connected energy-consumption rod piece structure with monitoring and sounding early warning functions Download PDFInfo
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- CN115096995B CN115096995B CN202210576005.3A CN202210576005A CN115096995B CN 115096995 B CN115096995 B CN 115096995B CN 202210576005 A CN202210576005 A CN 202210576005A CN 115096995 B CN115096995 B CN 115096995B
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 15
- 238000012806 monitoring device Methods 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000011257 shell material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 244000273256 Phragmites communis Species 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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Abstract
The invention discloses an axial connection type energy consumption rod piece structure with monitoring and sounding early warning functions, which comprises a viscous damper, a pin bolt, an upper chord member, a lower chord member, a vertical web member, an air flow pump, a vortex whistle, a reed whistle, a pickup, a return wire, a one-way valve and a spring piece, wherein the viscous damper is arranged on the upper chord member; the viscous damper is an axial energy consumption device, two ends of the viscous damper are connected with pins and are fixedly connected with the upper chord member and the lower chord member respectively through the pins; the upper chord member and the lower chord member are fixedly connected through a vertical web member; under the normal use condition, the rod piece sends out sound waves with different frequencies in real time through the sounder to be converted into electric signals, so that the effects of real-time monitoring and early warning are achieved. The energy-consumption rod piece structure consumes energy through the damper, has enough ductility, and can reduce vibration and damage of the engineering structure main body. The problem that internal performance of a complex structure and the like are difficult to monitor is solved.
Description
Technical Field
The invention designs a shaft-connected energy-consumption rod piece structure with monitoring and sounding early warning functions, and belongs to the technical fields of shock absorption control, an assembled structure and health monitoring of structural engineering.
Background
With the development of the times, the steel yield of China has been in the forefront of the world, and steel structures and combined structures are largely emerging. However, there are many problems to be solved in the following, such as anti-seismic design of large-span steel structures, real-time monitoring of large-scale steel-concrete combined bridges, etc. In the large span structure, lattice structures such as truss girders and large trusses are commonly used. Because of the mutual supporting effect between truss rod pieces, the truss rod piece has the characteristics of high rigidity, good integrity, strong shock resistance and the like, and is widely applied to various engineering fields.
At present, lattice structures represented by trusses are widely applied, but the earthquake resistance can only depend on the self performance, and the problems of stress concentration, fatigue damage and the like of truss members can occur under long-term use, so that the problems of how to detect the damage condition of the trusses in real time, when to replace damaged members and the like are needed to be solved. Therefore, it is extremely necessary to take certain damping and energy consumption measures to reduce the earthquake action under the condition that the characteristics of rigidity, strength and the like of the truss are ensured to meet the conditions, and realize real-time monitoring under the normal use condition so as to represent the damage condition of the truss.
The airflow type sounder utilizes gas as a power source, generates sound waves or ultrasonic waves through high-speed gas, and generates sound waves with different frequencies by different flow rates of gas. In addition, the vibration amplitude and damage possibility of the structure can be reduced by adopting the energy-consumption vibration reduction components such as viscous dampers and the like. The comprehensive application of the technology greatly improves the safety and performance of the structural main body.
Disclosure of Invention
In view of this, in order to improve the vibration-proof effect of the truss structure and monitor the fatigue damage of the structure in real time, the invention provides a shaft-connected energy-consuming rod structure with monitoring and sounding early warning functions, which mainly relies on viscous damper devices (including viscous damper, lower connecting rod, connecting plate and other components) to perform vibration-proof and sounding monitoring devices (including airflow pump, sounder, pickup and other components) to perform real-time monitoring. The damper is preferably a viscous damper, the viscous damper is hinged with the upper chord member node and the lower chord member node to form a shaft connection structure, and the truss structure main body part is fixedly connected together. Under the action of earthquake, the lower connecting rod is displaced through vibration, so that the viscous damper is driven to move. The shell material of the air flow pump is made of stainless steel, and the inner structure of the shell mainly comprises a piston, a one-way valve and the like. The air pump is characterized in that magnets are arranged in the piston of the damper and the piston of the air pump so as to enable the piston and the piston to move simultaneously, when the piston moves to one side opposite to the one-way valve, a gap is reserved between the piston of the air pump and the shell, and air can enter the air pump through the gap; when the piston moves to one side of the one-way valve, gas can enter the generating device through the one-way valve. In order to allow air to enter the air flow pump relatively much, the distance between the piston and the one-way valve in the pump cannot be less than 50% of the total length. In order to make the damper piston move relatively to the air flow pump piston, the air flow pump is welded to the viscous damper. The gas channel in the gas flow pump generator is designed to be thick in the inner part and thin in the outer part, namely the cross section of the channel close to the one-way valve is larger than that of the channel far away from the one-way valve. When the volume of the air flow is fixed, the smaller the cross section, the faster the flow velocity, and the faster the flow velocity, the more frequency sound waves can be emitted by the sound generating device. The vortex whistle air inlet also adopts the form of inner thickness and outer thickness, and because air is accelerated after coming out of the air channel of the air flow pump, and enters the vortex whistle air inlet to be accelerated continuously, the structure of the inner thickness and the outer thickness can obtain higher air flow speed than a straight air vent. The high-speed jet flow enters the cylindrical cavity along the tangential direction, and rotates in an accelerating way to form a vortex in the cavity, and finally, ultra-high sonic airflow flows out from an outlet above the cylindrical cavity, wherein an annealing line is engraved in an airflow outlet channel, the airflow is more stable, the frequency spectrum of an acoustic signal is more complex due to the measures, and the vortex whistle is connected with the spring whistle through a plastic pipeline, so that the spring whistle is directly above the vortex whistle. The spring pieces with different lengths inside the reed whistle vibrate to emit sound waves with different frequencies, and real-time frequency spectrums are collected through the pickup to detect whether the structure is damaged or not, wherein the pickup can be adhered beside the reed whistle through an adhesive. The volumes of the vortex whistle and the spring whistle are not too large, and the volumes of the vortex whistle and the spring whistle are coordinated, and steel, plastic and the like are generally selected as materials of the vortex whistle and the spring whistle. The main function of the damper in the invention is to consume part of vibration energy as a supporting member and enable the damper to reset to form a stress system after the vibration is relieved. The primary function of the sounder is to emit sound waves of different frequencies in real time and then receive data in real time through the sound pickup in an attempt to build a "fingerprint" of the structure through the spectrum built by the sounder.
The invention provides a shaft-connected energy-consumption rod piece structure with monitoring and sounding early warning functions, which can generate vibration of a lower connecting rod and a damper under the action of earthquake and strong wind, so that the viscous damper is displaced, and the effects of energy consumption and vibration reduction are achieved. Under the normal use condition, the viscous damper can generate periodic motion, and the magnets at the two ends can enable the piston of the air flow pump to move, so that the sounder can emit sound waves, and the purpose of monitoring in real time is achieved by continuously receiving the sound waves. The structure can enhance the anti-seismic and shock-absorbing effects of the structure system, monitor the self-vibration frequency of the structure in real time, and observe and maintain the structure in time on site when the audio frequency received by the pickup is abnormal.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The utility model provides an axle coupling formula power consumption truss and sound production monitoring devices structure mainly includes viscous damper (1), cotter (2), upper chord member (3), lower chord member (4), erects web member (5), air current pump send ware (6), vortex whistle (7), reed whistle (8) and adapter (9). The viscous damper (1) is an axial connection type energy consumption device, two ends of the viscous damper (1) are connected with a pin bolt (2), and the viscous damper is fixedly connected with the upper chord member (3) and the lower chord member (4) through the pin bolt (2) respectively; the upper chord member (3) and the lower chord member (4) are fixedly connected through a vertical web member (5). The air flow pump (6) is arranged on the viscous damper (1), the air flow pump (6) is connected with the vortex whistle (7), and the vortex whistle (7) is connected with the reed whistle (8) and the pickup (9); the vortex whistle (7), the reed whistle (8) and the pickup (9) form a sound production monitoring device.
The inner part of the piston of the viscous damper (1) and the inner part of the piston of the airflow pump (6) are provided with magnets, so that the piston of the viscous damper (1) and the piston of the airflow pump (6) move simultaneously; when the piston of the air flow pump (6) moves to one side opposite to the one-way valve, a gap is formed between the piston of the air flow pump (6) and the shell, and air can enter the air flow pump (6) through the gap; when the piston of the air flow pump (6) moves to one side of the one-way valve, air enters the sounding monitoring device through the one-way valve.
The air flow pump generator (6) pumps out air to enter the vortex whistle (7) through the one-way valve (12) in the air flow pump generator to accelerate the air flow, and then enters the reed whistle (8); the spring pieces (13) with different lengths in the reed whistle (8) vibrate to emit sound waves with different frequencies, and the sound waves are collected, analyzed and pre-warned by the pickup (9).
Under the normal use condition, the viscous damper (1) performs small deformation periodic movement, and as the magnet is arranged between the two pistons, the piston (10) in the air flow pump (6) can perform relative movement along with the movement of the piston in the viscous damper (1);
when vibration occurs, the viscous damper (1) is displaced greatly, and the displacement movement of the viscous damper is amplified by the relative displacement movement of the lower chord member (4) and the vertical web member (5), so that the effects of shock resistance, shock absorption and energy consumption are exerted more fully.
The viscous damper (1) and the sound production monitoring device structure are connected together through welding, wherein the welding position is used for enabling a piston in the viscous damper (1) to be close to a piston in the air flow pump (6) as much as possible.
In order to ensure the rigidity requirement of the truss structure system, the upper chord member (3), the lower chord member (4) and the vertical web member (5) are fixedly connected, so that the structural rigidity is increased. Such two or more rods are called "journalled" by means of shaft connections and devices. This "journalled structure" is a rigid structure, so it is placed in a mid-span position.
In order to ensure the smooth use of the sounding device, the gas channel of the air flow pump (6) should be designed into a form of thick inside and thin outside; the inlet of the vortex whistle (7) is also designed in a form of thick inside and thin outside, and the structure can enable the gas flow speed to be faster. The gas channel can use corrosion-resistant materials such as plastics, stainless steel and the like to ensure the tightness and the service life. The air flow outlet of the vortex whistle (7) is internally provided with an insulated wire (11) for enabling the air to flow out more stably, and the vortex whistle (7) and the reed whistle (8) are connected through a plastic pipeline so as to ensure the tightness of the air flow outlet. The reed whistle piece of the reed whistle (8) is provided with a plurality of spring pieces (13) with different lengths, so that more data can be monitored in real time for the purpose of more complicacy of frequency spectrum.
The structure assembly degree of the shaft-connected energy-consumption truss and the sound production monitoring device is high, the installation and the replacement are convenient, when a certain part of the structure is damaged due to strong vibration effect, the part can be replaced in time, and the integrity and the performance of the whole structure are not affected.
Compared with the prior art, the invention has the following advantages:
1) In the shaft-connected structure, the purpose of damping and energy consumption can be achieved through the displacement effect of the viscous damper in the vibration process, so that the stability of the structure can be better ensured.
2) The gas channel of the gas flow pump and the inlet of the vortex whistle are designed to be thick inside and thin outside, so that the gas flow rate can be faster and more stable.
3) The airflow inlet passage of the vortex whistle is tapered, which may further accelerate the airflow into the cavity.
4) The inside of the air flow outlet is printed with a reciprocating line, so that the air flow is more stable, and the frequency spectrum of the sound signal is more complex.
5) The reed whistle uses a plurality of reeds, wherein each reed has a different length, and can generate different sound frequencies, so that the pickup can collect signals better.
6) The shaft-connected energy-consumption truss structure has higher assembly degree, and when a certain part of the structure is damaged due to stronger vibration effect, the part can be replaced in time without affecting the whole function.
7) The sounding structure of the sounding monitoring device structure is recorded by means of sound signals, and is not recorded by means of displacement, acceleration and the like conventionally. The sounding monitoring device has simple structure manufacture, longer service life and lower manufacturing cost compared with other monitoring devices.
Drawings
FIG. 1 is a schematic view of an axial energy dissipating truss structure and a sound generator according to the present invention
Fig. 2 is a detailed schematic diagram of the structural shaft type energy dissipating device and the sound generator of the present invention.
Fig. 3 is a detailed view of the viscous damper of the present invention.
Fig. 4 is a detailed view of the air flow pump of the present invention.
Figure 5 is a side view of the vortex whistle of the present invention.
Figure 6 is a top view of the vortex whistle of the present invention.
Figure 7 is a cross-sectional view of the vortex whistle airflow outlet of the present invention.
Figure 8 is a schematic view of a reed whistle of the present invention.
Fig. 9 is a detailed view of the pickup of the present invention.
Fig. 10 is a three-dimensional view of a structural axis type energy dissipating device and a sound generator according to the present invention.
Wherein, the device comprises a 1-damper (viscous damper), a 2-pin, a 3-upper chord, a 4-lower chord, a 5-vertical web member, a 6-air flow pump, a 7-vortex whistle, an 8-reed whistle, a 9-pickup, a 10-piston, an 11-reciprocating wire, a 12-one-way valve and a 13-spring piece.
Detailed Description
The following describes in detail the embodiments of the present invention with reference to the drawings.
The structure of the shaft-connected energy-consumption truss and sound production monitoring device mainly comprises a damper (viscous damper) (1), a pin bolt (2), an upper chord member (3), a lower chord member (4), a vertical web member (5), an air flow pumping device (6), a vortex whistle (7), a reed whistle (8), a pickup (9), a piston (10), a reciprocating wire (11), a one-way valve (12) and a spring piece (13). Under the action of earthquake and strong wind, the lower connecting rod and the damper can vibrate, so that the viscous damper is displaced, and the effects of energy consumption and shock absorption are achieved. Under the normal use condition, the viscous damper can generate periodic motion, and the magnets at the two ends can enable the piston of the air flow pump to move, so that the sounder can emit sound waves, and the purpose of monitoring in real time is achieved by continuously receiving the sound waves. The structure can enhance the anti-seismic and shock-absorbing effects of the structure system, monitor the self-vibration frequency of the structure in real time, and observe and maintain the structure in time on site when the audio frequency received by the pickup is abnormal.
The purpose of damping and energy consumption is achieved through the displacement effect of the viscous damper in the vibration process, so that the stability of the structure can be better ensured.
The air passage of the air flow pump and the inlet of the vortex whistle are designed to be thick in the inner part and thin in the outer part, and the design can enable the air flow speed to be faster.
The airflow inlet passage of the vortex whistle of the present construction tapers which can further accelerate the airflow into the cavity.
The air flow outlet of the vortex whistle of the structure is internally printed with a return line, so that the air flow is more stable, and the frequency spectrum of a sound signal is more complex.
The reed whistle of this structure adopts a plurality of reeds, and wherein the length of every reed is different, can produce different sound wave frequencies for the adapter collects the signal better.
The assembly degree of this structure is higher, and when the stronger structure part of causing of vibration effect took place to destroy, can in time change this part, does not influence whole function.
Under the normal use condition, the rod member structure can meet the design requirements of engineering structures on rigidity, strength and ductility, and can send out sound waves with different frequencies in real time through the sounder to convert the sound waves into electric signals, so that the effects of real-time monitoring and early warning are achieved. The structure can be prefabricated in a factory in advance and assembled quickly on site. In addition, the energy-consumption rod piece structure comprises a viscous damper, and energy is consumed through the damper under the action of power such as earthquake, strong wind and the like, so that the energy-consumption rod piece structure has enough ductility, and vibration and damage of an engineering structure main body can be reduced. The structure can take place phenomenon such as stress concentration in long-time use and lead to the change of natural vibration frequency, and the sounder can be accurate send different frequencies, can regard as the early warning when certain threshold value that sounding frequency reached, indicates that this structure main part needs maintenance to consolidate to the difficult monitoring's such as complicated structure internal property problem has been solved.
Embodiment one:
As shown in fig. 1, the structure of the shaft-connected energy-consuming rod with the functions of monitoring and sounding pre-warning includes: 1-damper (viscous damper), 2-cotter, 3-upper chord, 4-lower chord, 5-vertical web member, 6-air flow pump, 7-vortex whistle, 8-reed whistle, 9-pickup. Taking a span on a plane truss as an example, the length of an upper chord member is 1.5 m, the length of a lower chord member is 1.5 m, and the length of a vertical web member is 1m, wherein the vertical shaft-connected energy-consumption truss is arranged on the middle span, and the sizes and arrangement modes of all parts of the shaft-connected energy-consumption truss structure are as follows:
1) The shaft-connected energy-consumption device is made of Q235 steel, and the viscous damper is fixed on the truss structure through a bolt by a welding method. The viscous damper is used for achieving the effects of energy consumption and shock absorption through damping movement of the viscous damper under the condition that the structure is in vibration.
2) Viscous dampers are based on the principle that a relatively dense fluid moves, and in particular, a restriction resistance is created when the fluid passes through an orifice, and are dampers that are related to the velocity of the piston movement. The viscous damper is adopted in the invention, because the viscous damper is sensitive to smaller displacement generated by vibration, the viscous damper can better play a role, and the energy consumption and shock absorption performance of the structure are enhanced.
3) The air flow pump is 0.1m long, the main part is stainless steel, the piston in the pump is connected with the piston on the viscous damper through the magnet, the piston in the air flow pump can move relatively along with the movement of the piston in the viscous damper, and the air flow pump blows out air and enters into the vortex whistle through the one-way valve, wherein the diameter of the vortex whistle is 0.1m, and the height is 0.1m.
4) The gas enters the vortex whistle to further accelerate the speed of sound waves caused by the rotation of the gas in the circular container, and the gas flow can be more stable by inscribing a line of return inside the outlet of the vortex whistle. The spring leaf on the reed whistle is different in length and is 4cm and 6cm respectively, which can lead to that when the spring leaf vibrates at different frequencies due to airflow, more different sound waves with different frequencies can be emitted, then data are received in real time through the pickup, and the frequency spectrum established through the sounder is tried to establish the fingerprint of the structure.
5) The shaft-connected energy-consumption device can be directly transported to the site for installation after being prefabricated and assembled in the prefabricated field, and meanwhile, the shaft-connected energy-consumption structure and the truss can be directly assembled in the prefabricated field and transported to the site for installation in a designated position, so that the construction time is saved, and the construction cost is reduced.
The above is an exemplary embodiment of the present invention, but the implementation of the present invention is not limited thereto.
Claims (4)
1. Axis-connected energy consumption rod piece structure with monitoring and sounding early warning functions, and is characterized in that: the device comprises a viscous damper (1), a pin bolt (2), an upper chord member (3), a lower chord member (4), a vertical web member (5) and an air flow pump (6); the viscous damper (1) is an axial connection type energy consumption device, two ends of the viscous damper (1) are connected with a pin bolt (2), and the viscous damper is fixedly connected with the upper chord member (3) and the lower chord member (4) through the pin bolt (2) respectively; the upper chord member (3) and the lower chord member (4) are fixedly connected through a vertical web member (5); the air flow pump (6) is arranged on the viscous damper (1), the air flow pump (6) is connected with the vortex whistle (7), and the vortex whistle (7) is connected with the reed whistle (8) and the pickup (9);
The air flow pump generator (6) pumps out air to enter the vortex whistle (7) through the one-way valve (12) in the air flow pump generator to accelerate the air flow, and then enters the reed whistle (8); the spring pieces (13) with different lengths in the reed whistle (8) vibrate to emit sound waves with different frequencies, and the sound waves are collected, analyzed and early-warned by the pickup (9);
under the normal use condition, the viscous damper (1) performs small deformation periodic movement, and as the magnet is arranged between the two pistons (10), the pistons (10) in the airflow pump (6) can relatively move along with the movement of the pistons in the viscous damper (1);
The gas channel of the gas flow pump (6) should be designed into the form of inner thick and outer thin; the inlet of the vortex whistle (7) is also designed to be thick inside and thin outside; an air flow outlet of the vortex whistle (7) is required to be engraved with a repeating line (11) so as to enable air to flow out more stably, and the vortex whistle (7) is connected with the reed whistle (8) through a plastic pipeline; the reed (8) is provided with a plurality of spring pieces (13) with different lengths so as to monitor data in real time.
2. The shaft-connected energy-consuming rod structure with monitoring and sounding pre-warning functions according to claim 1, wherein: when vibration occurs, the viscous damper (1) is displaced greatly, and the displacement movement of the viscous damper is amplified by the relative displacement movement of the lower chord member (4) and the vertical web member (5), so that the vibration-resistant vibration-reducing energy-consuming effects are fully exerted.
3. The shaft-connected energy-consuming rod structure with monitoring and sounding pre-warning functions according to claim 1, wherein: the viscous damper (1) and the sounding monitoring device are connected together through welding, and the welding position enables the piston in the viscous damper (1) to be close to the piston in the air flow pump (6) as much as possible.
4. The shaft-connected energy-consuming rod structure with monitoring and sounding pre-warning functions according to claim 1, wherein: the upper chord member (3), the lower chord member (4) and the vertical web member (5) are fixedly connected; two or more rods are in a shaft connection structure in a shaft connection mode; the articulated structure is a rigid structure.
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| CN202210576005.3A CN115096995B (en) | 2022-05-24 | 2022-05-24 | Shaft-connected energy-consumption rod piece structure with monitoring and sounding early warning functions |
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| CN202210576005.3A CN115096995B (en) | 2022-05-24 | 2022-05-24 | Shaft-connected energy-consumption rod piece structure with monitoring and sounding early warning functions |
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| CN115096995B true CN115096995B (en) | 2024-05-28 |
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| WO2013059522A1 (en) * | 2011-10-18 | 2013-04-25 | Lightsail Energy Inc | Compressed gas energy storage system |
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