CN112893069A - Structural vibration pulse simulation device with composite frequency - Google Patents
Structural vibration pulse simulation device with composite frequency Download PDFInfo
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- CN112893069A CN112893069A CN202011588015.6A CN202011588015A CN112893069A CN 112893069 A CN112893069 A CN 112893069A CN 202011588015 A CN202011588015 A CN 202011588015A CN 112893069 A CN112893069 A CN 112893069A
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- vibration
- pulse
- cosine
- sine
- push rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/20—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of a vibrating fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
Abstract
The invention provides a structural vibration pulse simulation device with composite frequency, which is used for solving the problem of how to excite structural pulse response under the excitation of irregular waves in a hull structural response test in the prior art. Comprises a vibration pulse excitation component, a multi-directional hydraulic component and a pulse vibration push rod. The vibration pulse arouses the subassembly and can arouse sinusoidal vibration pulse and cosine vibration pulse respectively from sine hydraulic push rod and cosine hydraulic push rod department, hydraulic push rod is connected with two multidirectional hydraulic assembly, a plurality of vibration pulse arouse the subassembly all with two multidirectional hydraulic assembly be connected and the vibration pulse frequency diverse, make hydraulic assembly receive composite frequency's vibration pulse, and then make the pulse vibration that the pulse vibration push rod produced be composite frequency's structure pulse, composite pulse passes through the push rod and extrudees fixed boats and ships structural component in structural test, thereby simulate the composite vibration pulse that the hull component received under complicated marine environment, realize hull structure monitoring and intensity evaluation test.
Description
Technical Field
The invention relates to the field of structural vibration pulse simulation, in particular to a structural vibration pulse simulation device with composite frequency.
Background
With the development of structure monitoring technology, sensors are mounted on structures such as large-scale machinery, bridges, ships and ocean engineering for structural state monitoring, which has become increasingly popular. In order to meet the monitoring target of the complex structure, the performance of the sensor, the selection of the monitoring point and the monitoring precision are often required to be evaluated. The study of these monitoring techniques often requires testing and validation using related structure monitoring experiments.
In the existing structural test, simple mechanical braking is often adopted, and although structural pulses with a single frequency can be formed, the complex and variable impact suffered by the structure in a real environment cannot be completely simulated. Particularly, the randomness and irregularity of the ship structure are difficult to embody under the action of irregular waves. In order to solve the simulation problem of the ship structure response pulse under the composite frequency, the invention excites the multi-directional response pulse under the composite frequency through a smart transmission device, thereby enabling the structure monitoring and evaluation test under the irregular composite frequency response to be possible. Meanwhile, the pulse simulation device can also be widely applied to the teaching work of structural pulse response, and the understanding of students on the random steady-state process of the waves is improved.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a structural vibration pulse simulator with complex frequency, which is used for solving the problem of how to excite the structural pulse response under the excitation of irregular waves in the hull structural response test in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a structural vibration pulse simulator with complex frequency, which comprises a vibration pulse excitation assembly, a multi-directional hydraulic assembly and a pulse vibration push rod.
The vibration pulse excitation assembly can excite sine vibration pulses and cosine vibration pulses, the number of the vibration pulse excitation assemblies is multiple, the vibration pulse excitation assembly comprises a sine hydraulic push rod and a cosine hydraulic push rod, the sine vibration pulses push the sine hydraulic push rod, and the cosine vibration pulses push the cosine hydraulic push rod;
the multi-directional hydraulic component is used for changing the vibration direction of pulses, the number of the multi-directional hydraulic components is two, the multi-directional hydraulic component comprises multi-directional hydraulic pipes, the two multi-directional hydraulic pipes are fixedly connected with sine hydraulic push rods and cosine hydraulic push rods of the vibration pulse excitation components respectively, the multi-directional hydraulic pipes are provided with a plurality of vibration output ends, and the directions of the vibration output ends are different;
the pulse vibration push rod, the pulse vibration push rod is used for exporting the structure vibration pulse of simulation, the quantity of pulse vibration push rod has a plurality ofly, and is a plurality of the pulse vibration push rod is with a plurality of the vibration output one-to-one just links firmly.
Preferably, the vibration pulse excitation assembly further comprises a control panel, a driving module, a transmission module, a sine assembly and a cosine assembly;
the control panel comprises a sine vibration switch, a cosine vibration switch and a driving piece switch, the sine vibration switch is used for controlling the communication of the sine component, the cosine vibration switch is used for controlling the communication of the cosine component, and the driving piece switch is used for controlling the opening of the driving module;
the number of the driving modules is two, each driving module comprises a driving piece, a circular sliding groove, a first connecting rod and a sliding block, the first connecting rod is used for connecting the driving piece and the sliding block, the sliding block is located in the circular sliding groove, and the driving piece drives the sliding block to slide in the circular sliding groove through the first connecting rod;
the transmission module comprises a second connecting rod, a third connecting rod, a longitudinal follow-up sliding rod and a transverse follow-up sliding rod, two ends of the second connecting rod are respectively connected to the sliding block in a rotating mode, the second connecting rod and the third connecting rod are arranged perpendicularly, the left end of the third connecting rod is fixed to the middle of the second connecting rod, the second connecting rod and the third connecting rod are both of a hollow structure, the second connecting rod drives the transverse follow-up sliding rod to slide along the horizontal direction, the transverse follow-up sliding rod is connected with the cosine component, the third connecting rod drives the longitudinal follow-up sliding rod to slide along the vertical direction, the longitudinal follow-up sliding rod is connected with the sine component, the cosine component is fixedly connected with the cosine hydraulic push rod, and the sine component is fixedly connected with the sine hydraulic push rod.
Preferably, pulleys are fixedly arranged on the longitudinal follow-up slide rod and the transverse follow-up slide rod, and the pulleys are respectively arranged in the hollow second connecting rod and the hollow third connecting rod and are in sliding connection.
Preferably, control panel still includes sine parameter display spare, cosine parameter display spare and rotation display spare, sine parameter display spare is used for showing sine parameter, cosine parameter display spare is used for showing cosine parameter, it is used for showing to rotate display spare the rotation parameter of driving piece, transmission module still includes and rotates potentiometre, wire rope, spring and electric wire, the both ends of vertical follow-up slide bar with the both ends of horizontal follow-up slide bar all are equipped with the spring, the other end of spring passes through wire rope connects, wire rope twines on rotating the potentiometre, the one end of electric wire with rotate the potentiometre and connect, the other end of electric wire is connected sine parameter display spare with cosine parameter display spare.
Preferably, a plurality of the vibration pulse excitation assemblies are connected in parallel and are all connected with the multidirectional hydraulic pipe, and the vibration pulse frequencies excited by the plurality of the vibration pulse excitation assemblies are different.
Preferably, the sine component comprises a first rack, a first sine transmission gear, a second sine transmission gear, a third sine transmission gear and a sine transmission wheel fixedly-connected slide bar, the first rack is fixedly arranged at the lower end of the longitudinal follow-up slide bar, teeth are arranged at the end of the sine hydraulic push rod, the first sine transmission gear is meshed with the first rack, the third sine transmission gear is meshed with the teeth of the sine hydraulic push rod, the second sine transmission gear is positioned on the sine transmission wheel fixedly-connected slide bar, the sine transmission wheel fixedly-connected slide bar can slide up and down, and the sine transmission wheel fixedly-connected slide bar is used for controlling the meshing of the sine component.
Preferably, the cosine component comprises a second rack, a first cosine transmission gear, a second cosine transmission gear, a third cosine transmission gear and a cosine transmission wheel fixedly-connected slide bar, the second rack is fixedly arranged at the upper left end of the transverse follow-up slide bar, teeth are arranged at the end of the cosine hydraulic push rod, the first cosine transmission gear is meshed with the second rack, the third cosine transmission gear is meshed with the teeth of the cosine hydraulic push rod, the second cosine transmission gear is positioned on the cosine transmission wheel fixedly-connected slide bar, the cosine transmission wheel fixedly-connected slide bar can slide left and right, and the cosine transmission wheel fixedly-connected slide bar is used for controlling the meshing of the cosine component.
Preferably, the multidirectional hydraulic assembly further comprises a plurality of direction locking knobs, the direction locking knobs correspond to the vibration output ends one by one, and the direction locking knobs are used for controlling the on-off of the vibration output ends.
Preferably, multidirectional hydraulic assembly still includes a plurality of variable direction pulse vibration subassemblies, variable direction pulse vibration subassembly includes the fixed lock of variable direction pulse push rod, direction skew gear, ring channel base and direction, the ring channel base is fixed the outside of multidirectional hydraulic pressure pipe, the one end of variable direction pulse push rod can be followed the ring channel base slides, be equipped with the straight-tooth on the external diameter of variable direction pulse push rod, the external diameter of pulse vibration push rod also is equipped with the straight-tooth, direction skew gear respectively with variable direction pulse push rod with the straight-tooth meshing of pulse vibration push rod, the fixed lock of direction is used for the locking to be located on the ring channel base variable direction pulse push rod.
Preferably, the device further comprises a support assembly, wherein the support assembly is used for supporting the vertically placed structural vibration pulse simulation device with the composite frequency, the support assembly comprises a first support and a second support, the first support is used for supporting the vibration pulse excitation unit, and the second support is used for supporting the multidirectional hydraulic assembly.
As described above, the structural vibration pulse simulation device with composite frequency according to the present invention has at least the following beneficial effects:
the both sides that the vibration pulse arouses the subassembly are equipped with sine hydraulic push rod and cosine hydraulic push rod respectively, the vibration pulse arouses the subassembly and can arouse sine vibration pulse and cosine vibration pulse respectively from sine hydraulic push rod and cosine hydraulic push rod department, and sine hydraulic push rod and cosine hydraulic push rod are connected with two multidirectional hydraulic assembly's input respectively, the sine vibration pulse that the vibration pulse arouses the subassembly can transmit to multidirectional hydraulic assembly through sine hydraulic push rod on, the cosine vibration pulse that the vibration pulse arouses the subassembly can transmit to multidirectional hydraulic assembly through cosine hydraulic push rod on. The plurality of vibration pulse excitation assemblies are connected with the two multidirectional hydraulic assemblies simultaneously, and the vibration pulse frequency excited by the plurality of vibration pulse excitation assemblies is different, so that the multidirectional hydraulic assemblies receive vibration pulses with composite frequency through the hydraulic push rods. The pulse vibration generated by the pulse vibration push rods fixedly connected with the vibration output ends on the multidirectional hydraulic pipes is the structural pulse with composite frequency output by equipment, and the composite pulse extrudes the fixed ship structural member in a structural test through the push rods, so that the composite vibration of the ship structural member under the real and complex marine environment is simulated, and the evaluation of the structural strength of the ship body and the performance of the sensors arranged on the structure is realized.
Drawings
Fig. 1 shows a horizontal operating layout of a complex frequency structural vibration pulse simulator in accordance with the present invention.
Fig. 2 shows a longitudinal operation layout of a complex frequency structural vibration pulse simulator in accordance with the present invention.
Fig. 3 shows a schematic view of the housing of the vibration pulse excitation assembly.
Fig. 4 shows a schematic view of the internal working principle of the vibration pulse excitation assembly.
Fig. 5 shows a schematic structure of a transverse follow-up slide rod.
Fig. 6 is a schematic view of the direction fixing lock structure.
Fig. 7 shows a schematic diagram of the cosine pulley block principle.
Fig. 8 shows a schematic view of the sinusoidal pulley block principle.
Fig. 9 is a partially enlarged view of the connection of the variable direction impulse push rod.
Fig. 10 is a schematic diagram showing the operation of the variable direction impulse push rod.
Fig. 11 shows a schematic view of the structure of the outer and inner rods.
Description of the element reference numerals
1. A multi-directional hydraulic assembly; 11. a sinusoidal hydraulic push rod; 12. a cosine hydraulic push rod; 13. control panel, 131, sine vibration switch; 132. a cosine vibration switch; 133. a driver switch; 134. a sinusoidal parameter display; 135. a cosine parameter display; 136. rotating the display member; 137. rotating the potentiometer; 138. a wire rope; 139. a spring; 1391. an electric wire; 14. a drive module; 141. a drive member; 142. a circular chute; 143. a first link; 144. a slider; 15. a transmission module; 151. a second link; 152. a third link; 153. a longitudinal follow-up slide bar; 154. a transverse follow-up slide bar; 155. a pulley; 156. a first stopper; 157. a second limiting block; 16. a sinusoidal component 161, a first rack; 162. a first sinusoidal drive gear; 163. a second sinusoidal drive gear; 164. a third sinusoidal drive gear; 165. the sine transmission wheel is fixedly connected with the slide bar; 17. a cosine component; 171. a second rack; 172. a first cosine drive gear; 173. a second sinusoidal drive gear; 174. a third cosine drive gear; 175. the cosine transmission wheel is fixedly connected with the sliding rod;
2. a multidirectional hydraulic component 21, a multidirectional hydraulic pipe; 22. a direction locking knob; 23. a variable direction pulse vibration assembly; 231. a variable direction pulse push rod 2311, an outer rod; 2312. an inner rod; 232. a direction shift gear; 233. a ring groove base; 234. a direction fixing lock; 2341. locking screws; 2342. a lock body; 2343. a roller;
3. the push rod is vibrated by pulse;
4. a support assembly; 41. a first bracket; 42. a second bracket;
5. a marine structural member;
6. and testing the fixed base.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 11. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.
Referring to fig. 1 to 11, the present invention provides a composite frequency structural vibration pulse simulator, which includes a vibration pulse excitation assembly 1, a multi-directional hydraulic assembly 2 and a pulse vibration push rod 3.
The vibration pulse excitation component 1, the vibration pulse excitation component 1 can excite sine vibration pulse and cosine vibration pulse, and the frequency of sine vibration pulse and cosine vibration pulse excited by the same vibration pulse excitation component 1 is the same, and the frequency is adjustable. The quantity that vibration pulse arouses subassembly 1 has a plurality ofly, and the quantity that vibration pulse arouses subassembly 1 can be adjusted according to the experiment demand, and the frequency that a plurality of vibration pulse arouses subassembly 1 arouses can be diverse, and a plurality of vibration pulse arouses subassembly 1 can be parallelly connected. The vibration pulse excitation assembly 1 comprises a sine hydraulic push rod 11 and a cosine hydraulic push rod 12, the sine vibration pulse pushes the sine hydraulic push rod 11 to perform pulse motion along the horizontal direction, and the cosine vibration pulse pushes the cosine hydraulic push rod 12 to perform pulse motion along the horizontal direction.
And the multidirectional hydraulic assembly 2 is used for changing the vibration direction of the pulse, and after the vibration pulse sent by the vibration pulse excitation assembly 1 is transmitted to the multidirectional hydraulic assembly 2 through pulse pushing, the multidirectional hydraulic assembly 2 can transmit the pulse to all directions. The quantity of multidirectional hydraulic component 2 is two, and two multidirectional hydraulic component 2's input is connected with sine hydraulic push rod 11 and cosine hydraulic push rod 12 respectively, and when a plurality of vibration pulse aroused subassembly 1 and connect in parallel, each sine hydraulic push rod 11 all lies in same one side, and each cosine hydraulic push rod 12 all lies in the opposite side, avoids appearing sine hydraulic push rod 11 and cosine hydraulic push rod 12 and mixes and make multidirectional hydraulic component 2 internal pulse offset. The multidirectional hydraulic component 2 comprises multidirectional hydraulic pipes 21, two multidirectional hydraulic pipes 21 are fixedly connected with the sine hydraulic push rod 11 and the cosine hydraulic push rod 12 of the vibration pulse excitation component 1 respectively, so that the multidirectional hydraulic pipes 21 can receive vibration pulses sent by the vibration pulse excitation components 1, and due to different pulse frequencies sent by the vibration pulse excitation components 1, the vibration pulses with multiple frequencies in the multidirectional hydraulic pipes 21 are compounded, the multidirectional hydraulic pipes 21 are provided with multiple vibration output ends, the multiple vibration output ends can output structural vibration pulses with the compound frequencies, and the left-side fixed-direction pulse vibration push rod 3 in the graph 1 can realize multi-level cosine pulse motion eta 3cSigma Acos (kx- ω t + e), a multi-level sinusoidal pulse motion η can be achieved on the right sidesA direction of the plurality of vibration output terminals is different from each other, and accordingly, the vibration output terminals are arranged in different directionsThe structural vibration pulses of complex frequencies can be emitted in all directions.
Pulse vibration push rod 3, pulse vibration push rod 3 is used for exporting the structure vibration pulse of simulation, pulse vibration push rod 3's quantity has a plurality ofly, and is a plurality of pulse vibration push rod 3 and a plurality of vibration output end one-to-one just links firmly, pulse vibration push rod 3 can with be connected to each structure of hull, realize the structure monitoring and the aassessment experiment to the hull.
When pulse vibration of analog composite frequency is carried out on the hull mechanism member 5, the hull mechanism member 5 is fixed on the test fixing base 6, when the vibration pulse is output horizontally, the output end is the pulse vibration push rod 3, and when the vibration pulse is at a certain angle, the output end is the variable direction pulse push rod 231.
Referring to fig. 1 to 4, in the present embodiment, the vibration pulse excitation assembly 1 further includes a control panel 13, a driving module 14, a transmission module 15, a sine component 16 and a cosine component 17, the vibration pulse excitation assembly 1 may be disposed in a relatively sealed box, and the control panel 13 may be disposed above the box;
the control panel 13 includes a sine vibration switch 131, a cosine vibration switch 132 and a driving element switch 133, the sine vibration switch 131 is used for controlling the communication of the sine component 16, the cosine vibration switch 132 is used for controlling the communication of the cosine component 17, the driving element switch 133 is used for controlling the on-off of the driving module 14, when a part of experiments of the ship body are carried out, a sine and cosine test is not needed, at the same time, a part which does not need to be operated can be closed through the sine vibration switch 131 or the cosine vibration switch 132, the plurality of vibration pulses excite the component 1 to be connected in parallel, and when the needed frequency is not much, the driving element switch 133 can be controlled to close the driving element 141, so that the vibration pulses which do not need to be sent are closed;
the number of the driving modules 14 is two, the two driving modules 14 operate synchronously, so that the emitted vibration pulse is more stable, each driving module 14 includes a driving element 141, a circular sliding groove 142, a first connecting rod 143 and a sliding block 144, the driving element 141 can be a driving element 141 with an adjustable rotating speed such as a motor or an air cylinder, the first connecting rod 143 is used for connecting the driving element 141 and the sliding block 144, the sliding block 144 is located in the circular sliding groove 142, the sliding block 144 is clamped in the circular sliding groove 142, one surface of the sliding block 144 is rotatably connected with the first connecting rod 143, and the driving element 141 drives the sliding block 144 to slide in the circular sliding groove 142 through the first connecting rod 143;
the transmission module 15 includes a second connecting rod 151, a third connecting rod 152, a longitudinal follower sliding rod 153 and a transverse follower sliding rod 154, two ends of the second connecting rod 151 are respectively rotatably connected to the sliding block 144, the sliding block 144 periodically rotates to drive the second connecting rod 151 to periodically move up and down, left and right, the second connecting rod 151 and the third connecting rod 152 are vertically arranged, the left end of the third connecting rod 152 is fixed at the middle of the second connecting rod 151 in a manner of bonding, welding or bracket fixing, etc., to form a t-shape turning 90 degrees right, the middle of the second connecting rod 151 and the third connecting rod 152 are both hollow structures, the second connecting rod 151 drives the transverse follower sliding rod 154 to slide along the horizontal direction, the transverse follower sliding rod 154 is limited by a first limiting block 156 and can only move horizontally, the transverse follower sliding rod 154 is connected to the cosine component 17, the third connecting rod 152 drives the longitudinal follow-up slide rod 153 to slide along the vertical direction, the longitudinal follow-up slide rod 153 is limited by the first limiting block 156 and can only move vertically, the longitudinal follow-up slide rod 153 is connected with the sine component 16, the cosine component 17 is fixedly connected with the cosine hydraulic push rod 12, so that the periodic motion of the transverse follow-up slide rod 154 is transmitted to the cosine hydraulic push rod 12, the frequency of the motion of the second connecting rod 151 is the pulse frequency output by the cosine hydraulic push rod 12, the sine component 16 is fixedly connected with the sine hydraulic push rod 11, so that the periodic motion of the longitudinal follow-up slide rod 153 is transmitted to the sine hydraulic push rod 11, and the frequency of the motion of the third connecting rod 152 is the pulse frequency output by the sine hydraulic push rod 11.
Referring to fig. 1 to 5, in the embodiment, pulleys 155 are fixedly disposed on the longitudinal follow-up slide bar 153 and the transverse follow-up slide bar 154, the pulleys 155 are fixedly connected to the longitudinal follow-up slide bar 153 and the transverse follow-up slide bar 154, and a second limiting block 157 is further disposed at an upper end of the pulleys 155, so as to prevent the pulleys 155 from falling off, and since the movement is fast during actual simulation pulse, the pulleys 155 need a certain durability. The pulleys 155 are respectively disposed in the hollow second connecting rod 151 and the hollow third connecting rod 152 and slidably connected, so that when the second connecting rod 151 and the third connecting rod 152 move along with the rotation of the driving member 141, the second connecting rod 151 drives the transverse follower sliding rod 154 to horizontally slide through the pulley 155, and the third connecting rod 152 drives the longitudinal follower sliding rod 153 to vertically slide through the pulley 155.
Referring to fig. 1 to 4, in the present embodiment, the control panel 13 further includes a sine parameter display 134, a cosine parameter display 135 and a rotation display 136, the sine parameter display 134 is used for displaying sine parameters, the cosine parameter display 135 is used for displaying cosine parameters, the sine parameters include information such as sine pulse amplitude and sine pulse period, and the cosine parameters are also the same. The rotation display member 136 is used for displaying the rotation parameters of the driving member 141, including the rotation speed, the rotation frequency, the rotation period, and the like. The transmission module 15 further comprises a rotary potentiometer 137, a steel wire rope 138, a spring 139 and an electric wire 1391, the springs 139 are arranged at both ends of the longitudinal follow-up slide bar 153 and both ends of the transverse follow-up slide bar 154, the spring 139 mainly has a tensioning effect, so that the steel wire rope 138 is always in a tight state, the motion of the follow-up slide bar can be accurately reflected on the rotary potentiometer 137, the other end of the spring 139 is connected through the steel wire rope 138, the position of the rotary potentiometer 137 is fixed, the steel wire rope 138 is wound on the rotary potentiometer for enough winding number of turns, the rotary potentiometer can be driven to rotate 137 without sliding when the steel wire rope 138 is pulled, when the longitudinal follow-up slide bar 153 or the transverse follow-up slide bar 154 is driven by the driving module 14 to generate reciprocating motion, the extension and retraction of the spring 139 are also pulled, and the motion of the steel wire rope 138 is pulled, the steel wire rope 138 wound on the rotary potentiometer 137 drives the rotary potentiometer 137 to rotate in the moving process, so that the actual resistance value of the rotary potentiometer 137 is changed periodically, the rotary potentiometer 137 is a common part and is not described in detail here, one end of the electric wire 1391 is connected with the rotary potentiometer 137, the other end of the electric wire 1391 is connected with the sine parameter display piece 134 and the cosine parameter display piece 135, the preset voltage value on the display piece is unchanged when the resistance value of the rotary potentiometer 137 is changed, further the current is changed periodically, and information such as the pulse amplitude and the pulse period on the sine parameter display piece 134 and the cosine parameter display piece 135 is obtained by monitoring the change of the current.
Referring to fig. 1 to 2, in the embodiment, a plurality of the vibration pulse excitation assemblies 1 are connected in parallel and are all connected to the multi-directional hydraulic pipe 21, and sine vibration pulses and cosine vibration pulses of the plurality of vibration pulse excitation assemblies 1 are located on the same side, so that the sine vibration pulses and the cosine vibration pulses are prevented from being arranged in a crossing manner, and the vibration pulses in the multi-directional hydraulic assembly 2 are cancelled. The vibration pulse frequency excited by the vibration pulse excitation assembly 1 is different, the vibration pulses with different frequencies form composite vibration pulses in the multidirectional hydraulic assembly 2, and the frequency of the composite vibration pulses needing to carry out structure monitoring and evaluation tests on the ship body is simulated by adjusting the pulse frequency excited by the vibration pulse excitation assembly 1.
Referring to fig. 1 to 8, in the present embodiment, the sine component 16 includes a first rack 161, a first sine transmission gear 162, a second sine transmission gear 163, a third sine transmission gear 164, and a sine transmission wheel fixed slide bar 165, the first sine transmission gear 162, the second sine transmission gear 163, and the third sine transmission gear 164 may be horizontally arranged and can be engaged with each other, so that the sinusoidal assembly 16 can convert the vertical movement of the longitudinal follower slide 153 into a horizontal movement of the sinusoidal hydraulic ram 11, the first rack 161 is fixedly arranged at the lower end of the longitudinal follow-up slide rod 153, the end of the sinusoidal hydraulic push rod 11 is provided with teeth, the first sinusoidal transmission gear 162 is meshed with the first rack 161, the third sinusoidal transmission gear 164 is meshed with the teeth of the sinusoidal hydraulic push rod 11, and all the meshed teeth can be straight teeth or helical teeth and the like. The second sine transmission gear 163 is located on the sine transmission wheel fixedly-connected slide rod 165, and can be located at the upper end of the sine transmission wheel fixedly-connected slide rod 165, and the sine transmission wheel fixedly-connected slide rod 165 can slide up and down. The sine driving wheel fixedly-connected slide rod 165 can be further provided with a sine vibration switch 131, the upper part of the sine vibration switch 131 is positioned on the control panel 13, a locking mechanism is also required to be arranged on the sine driving wheel fixedly-connected slide rod 165 to prevent the sine driving wheel from sliding freely and being incapable of being meshed with the first sine transmission gear 162 and the third sine transmission gear 164, the locking mode can be realized by adding a telescopic stop block on the control panel 13, the retractable stopper is fixed on one side of the track of the sinusoidal vibration switch 131, when the sinusoidal vibration switch 131 is pushed up to a predetermined position to engage with other gears, the telescopic block is pushed to the lower end of the sine vibration switch 131 to support the sine vibration switch, the position of the telescopic block is fixed, the sine vibration switch 131 is pushed to slide up and down, whether the sine component 16 is engaged or not can be controlled, thereby controlling the work of the sine component 16, and the sine driving wheel is fixedly connected with the sliding rod 165 for controlling the meshing of the sine component 16.
Referring to fig. 1 to 7, in the present embodiment, the cosine assembly 17 includes a second rack 171, a first cosine transmission gear 172, a second cosine transmission gear 173, a third cosine transmission gear 174 and a cosine transmission gear fixed slide rod 175, the first cosine transmission gear 172, the second cosine transmission gear 173 and the third cosine transmission gear 174 may be vertically arranged and can be engaged with each other, so that the cosine block 17 can convert the horizontal movement of the transverse follower slide bar 154 into the horizontal movement of the cosine hydraulic push rod 12, the second rack 171 is fixedly arranged at the upper left end of the transverse follower sliding rod 154, the end of the cosine hydraulic push rod 12 is provided with teeth, the first cosine transmission gear 172 is meshed with the second rack 171, the third cosine transmission gear 174 is meshed with teeth of the cosine hydraulic push rod 12, and all the meshed teeth can be straight teeth or helical teeth and the like. The second cosine transmission gear 173 is located on the cosine transmission wheel fixedly-connected slide bar 175 and can be located at the end of the cosine transmission wheel fixedly-connected slide bar 175, so that the second cosine transmission gear 173 can be meshed with the first cosine transmission gear 172 and the third cosine transmission gear 174, the number of the second cosine transmission gear 173 and the number of the cosine transmission wheel fixedly-connected slide bar 175 can be two, the two second cosine transmission gears 173 can be meshed with the first cosine transmission gear 172 and the third cosine transmission gear 174 and have no meshing relationship with each other, and the cosine transmission wheel fixedly-connected slide bar 175 can slide left and right. The cosine driving wheel fixedly-connected slide bar 175 can also be provided with a cosine vibration switch 132, the upper part of the cosine vibration switch 132 is positioned on the control panel 13, and the cosine driving wheel fixedly-connected slide bar 175 is also required to be provided with a locking mechanism to prevent the cosine driving wheel from freely sliding under the free state and being incapable of being meshed with the first cosine transmission gear 172 and the third cosine transmission gear 174, the locking mode can be realized by adding a telescopic stop block on the control panel 13, the retractable stopper is fixed on one side of the trace of the cosine vibration switch 132, when the cosine vibration switch 132 is pushed up to a predetermined position to engage with other gears, the retractable block is pushed to the preset position of the cosine vibration switch 132 to support the retractable block, the position of the retractable block is fixed, whether the cosine component 17 is engaged or not can be controlled by pushing the cosine vibration switch 132 to slide left and right, thereby controlling the operation of the cosine block 17, and the cosine transmission wheel is fixedly connected with the sliding rod 175 for controlling the meshing of the cosine block 17.
Referring to fig. 1 to 2, in this embodiment, the multi-directional hydraulic assembly 2 further includes a plurality of directional locking knobs 22, the plurality of directional locking knobs 22 correspond to the vibration output ends one by one, the directional locking knobs 22 are used for controlling on/off of the vibration output ends, a portion of the directional locking knob 22 extending into the multi-directional hydraulic pipe 21 may have threads, the multi-directional hydraulic pipe 21 is also provided with a hole, the hole is provided with a thread matching with an outer diameter of the directional locking knob 22, the directional locking knob 22 is rotated until contacting the pulse vibration push rod 3, and the pulse vibration push rod 3 is locked by pressing force.
Referring to fig. 1 to 11, in the present embodiment, the multi-directional hydraulic assembly 2 further includes a plurality of variable directional pulse vibration assemblies 23, the variable directional pulse vibration assemblies 23 can adjust the angle of a horizontal or vertical vibration pulse within a certain range, the variable directional pulse vibration assemblies 23 include a variable directional pulse push rod 231, a directional offset gear 232, a circular groove base 233 and a directional fixing lock 234, the circular groove base 233 is fixed to the outer side of the multi-directional hydraulic pipe 21, the circular groove base 233 may be located between the horizontal and vertical pulse vibration push rods 3, a smooth semicircular groove is formed on the circular groove base 233, and the directional fixing lock 234 includes a locking screw 341, a lock body 2342 and a roller 2343. The lock body 2342 can slide in the semicircular groove, the lock body 2342 is in an I shape, the transverse bottom end of the I shape is located in the semicircular sliding groove and can slide freely, the transverse upper end of the I shape is located on the annular groove, the variable-direction pulse push rod 231 comprises an outer rod 2311 and an inner rod 2312, as shown in fig. 11, the end of the inner rod 2312 can be placed in the smooth semicircular groove of the annular groove base 233, the inner rod 2312 can slide along the semicircular groove, concave structures are arranged on two sides of the inner rod 2312 in the length direction, two convex structures are arranged on the inner side plane of the outer rod 2311 and just match with the concave structures of the inner rod 2312 to form a track similar to a railway, lubricants such as grease can be coated on the matching position of the inner rod 2312 and the outer rod 2311, the inner rod and the outer rod slide more easily, the rollers 2343 installed on the lock body are in sliding contact with the outer side of the outer rod 2311, the gyro wheel and outer pole 2311's sliding contact, outer pole 2311 is spacing by interior pole 2312 and two gyro wheels 2343 this moment, can provide the guide effect for the slip of outer pole 2311 on the variable direction pulse push rod 231, and lock body 2342 is located variable direction pulse push rod 231 both sides, the rotation of locking screw 341 can be with the lock body fastening on the base, and then the outer pole 2311 position with variable direction pulse push rod 231 is fixed, the position of the outer pole 2311 of locking also is located the interior pole 2312 position locking of ring channel with one end simultaneously, the fixed to variable direction pulse push rod 231 has been realized. The outer diameter of the outer rod 2311 is provided with straight teeth, the outer diameter of the pulse vibration push rod 3 is also provided with straight teeth, the straight teeth are arranged around the rod in a circle, and the direction deviation gear 232 is meshed with the straight teeth on the outer rod 2311 and the pulse vibration push rod 3 respectively. When the pulse vibration push rod 3 vibrates, the thread through the outer diameter of the pulse vibration push rod 3 drives the direction deviation gear 232 to rotate, and further drives the outer rod 2311 on the variable direction pulse push rod 231, it needs to be noted that the displacement of the outer rod 2311 is not too large, the stroke of the pulse vibration push rod 3 needs to be noted and controlled during debugging, the radius of the annular groove base 233 cannot be exceeded, and the straight teeth on the outer rod 2311 cannot be contacted with the roller 2343, so that the straight teeth of the outer rod 2311 are easily damaged, and the outer rod 2311 is clamped. At this time, the pulse vibration direction of the variable direction pulse push rod 231 is opposite to that of the pulse vibration push rod 3, and attention is required in the test. The size of the direction shift gear 232 can be changed, but the parameters of the teeth on the gear are kept consistent, and the corresponding gear can be changed according to the angle of the variable direction pulse push rod 231. The direction fixing lock 234 is used for locking the variable direction pulse push rod 231 on the annular groove base 233, when a required angle needs to be adjusted, screws on the two direction fixing locks 234 on the annular groove base 233 are tightened, the variable direction pulse push rod 231 can be locked, when a plurality of variable direction pulse vibration assemblies 23 do not need to work, only straight teeth on the periphery of the outer rod 2311 on the corresponding variable direction pulse push rod 231 need not be meshed with the direction deviation gear 232, then the direction fixing lock 234 locks the variable direction pulse push rod 231, and the like, or the direction deviation gear 232 can be directly taken down.
Referring to fig. 1 to 2, in the present embodiment, the support assembly 4 is further included, the support assembly 4 is configured to support the vertically-placed structural vibration pulse simulation apparatus with the composite frequency, the support assembly 4 includes a first support 41 and a second support 42, the first support 41 is configured to support the vibration pulse excitation unit, the second support 42 is configured to support the multi-directional hydraulic assembly 2, and the structural vibration pulse simulation apparatus with the composite frequency is vertically supported by the support assembly 4, so that the pulse simulated by the apparatus can be emitted in a horizontal plane, and can also output a vibration pulse in a vertical direction, which can meet monitoring and evaluation tests of a complex structure of a ship hull, and meet tests under different working conditions.
In summary, in the present invention, a sine hydraulic push rod 11 and a cosine hydraulic push rod 12 are respectively disposed on two sides of a vibration pulse excitation assembly 1, the vibration pulse excitation assembly 1 can respectively excite sine vibration pulses and cosine vibration pulses from the sine hydraulic push rod 11 and the cosine hydraulic push rod 12, the sine hydraulic push rod 11 and the cosine hydraulic push rod 12 are respectively connected to input ends of two multi-directional hydraulic assemblies 2, the sine vibration pulses excited by the vibration pulse excitation assembly 1 can be transmitted to the multi-directional hydraulic assemblies 2 through the sine hydraulic push rod 11, and the cosine vibration pulses excited by the vibration pulse excitation assembly 1 can be transmitted to the multi-directional hydraulic assemblies 2 through the chord hydraulic push rod. A plurality of vibration pulse arouse subassembly 1 and be connected with two multidirectional hydraulic assembly 2 simultaneously, and the vibration pulse frequency diverse that a plurality of vibration pulse arouse subassembly 1 arouses for multidirectional hydraulic assembly 2 receives the vibration pulse of complex frequency through hydraulic push rod. The pulse vibration generated by the pulse vibration push rod 3 fixedly connected with the plurality of vibration output ends on the multidirectional hydraulic pipe 21 is the structural pulse with composite frequency output by equipment, the composite pulse extrudes the fixed ship structural member in a structural test through the push rod, so that the composite vibration of the ship structural member under the real and complex marine environment is simulated, the evaluation of the structural strength of the ship body and the performance of the structurally-arranged sensor is realized, and the problem of how to excite the structural pulse response under the excitation of irregular waves in the ship structural response test in the prior art is effectively solved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A composite frequency structural vibration pulse simulator, comprising:
the vibration pulse excitation assembly can excite sine vibration pulses and cosine vibration pulses, the number of the vibration pulse excitation assemblies is multiple, the vibration pulse excitation assembly comprises a sine hydraulic push rod and a cosine hydraulic push rod, the sine vibration pulses push the sine hydraulic push rod, and the cosine vibration pulses push the cosine hydraulic push rod;
the multi-directional hydraulic component is used for changing the vibration direction of pulses, the number of the multi-directional hydraulic components is two, the multi-directional hydraulic component comprises multi-directional hydraulic pipes, the two multi-directional hydraulic pipes are fixedly connected with sine hydraulic push rods and cosine hydraulic push rods of the vibration pulse excitation components respectively, the multi-directional hydraulic pipes are provided with a plurality of vibration output ends, and the directions of the vibration output ends are different;
the pulse vibration push rod, the pulse vibration push rod is used for exporting the structure vibration pulse of simulation, the quantity of pulse vibration push rod has a plurality ofly, and is a plurality of the pulse vibration push rod is with a plurality of the vibration output one-to-one just links firmly.
2. A composite frequency structural vibration pulse simulation apparatus according to claim 1, wherein: the vibration pulse excitation assembly further comprises a control panel, a driving module, a transmission module, a sine assembly and a cosine assembly;
the control panel comprises a sine vibration switch, a cosine vibration switch and a driving piece switch, the sine vibration switch is used for controlling the communication of the sine component, the cosine vibration switch is used for controlling the communication of the cosine component, and the driving piece switch is used for controlling the opening of the driving module;
the number of the driving modules is two, each driving module comprises a driving piece, a circular sliding groove, a first connecting rod and a sliding block, the first connecting rod is used for connecting the driving piece and the sliding block, the sliding block is located in the circular sliding groove, and the driving piece drives the sliding block to slide in the circular sliding groove through the first connecting rod;
the transmission module comprises a second connecting rod, a third connecting rod, a longitudinal follow-up sliding rod and a transverse follow-up sliding rod, two ends of the second connecting rod are respectively connected to the sliding block in a rotating mode, the second connecting rod and the third connecting rod are arranged perpendicularly, the left end of the third connecting rod is fixed to the middle of the second connecting rod, the second connecting rod and the third connecting rod are both of a hollow structure, the second connecting rod drives the transverse follow-up sliding rod to slide along the horizontal direction, the transverse follow-up sliding rod is connected with the cosine component, the third connecting rod drives the longitudinal follow-up sliding rod to slide along the vertical direction, the longitudinal follow-up sliding rod is connected with the sine component, the cosine component is fixedly connected with the cosine hydraulic push rod, and the sine component is fixedly connected with the sine hydraulic push rod.
3. A composite frequency structural vibration pulse simulation apparatus according to claim 1, wherein: pulleys are fixedly arranged on the longitudinal follow-up slide bar and the transverse follow-up slide bar and are respectively arranged in the hollow second connecting rod and the hollow third connecting rod and are in sliding connection.
4. A composite frequency structural vibration pulse simulation apparatus according to claim 2, wherein: control panel still includes sine parameter display piece, cosine parameter display piece and rotation display piece, sine parameter display piece is used for showing sine parameter, cosine parameter display piece is used for showing cosine parameter, it is used for showing to rotate display piece the rotation parameter of driving piece, drive module still includes and rotates potentiometre, wire rope, spring and electric wire, the both ends of vertical follow-up slide bar with the both ends of horizontal follow-up slide bar all are equipped with the spring, the other end of spring passes through wire rope connects, the wire rope winding on rotating the potentiometre, the one end of electric wire with the rotation potentiometre is connected, the other end of electric wire is connected sine parameter display piece with cosine parameter display piece.
5. A composite frequency structural vibration pulse simulation apparatus according to claim 1, wherein: the vibration pulse excitation assemblies are connected in parallel and are connected with the multidirectional hydraulic pipe, and the vibration pulse frequencies excited by the vibration pulse excitation assemblies are different.
6. A composite frequency structural vibration pulse simulation apparatus according to claim 2, wherein: the sine component comprises a first rack, a first sine transmission gear, a second sine transmission gear, a third sine transmission gear and a sine transmission wheel fixedly-connected sliding rod, the first rack is fixedly arranged at the lower end of the longitudinal follow-up sliding rod, teeth are arranged at the end of the sine hydraulic push rod, the first sine transmission gear is meshed with the first rack, the third sine transmission gear is meshed with the teeth of the sine hydraulic push rod, the second sine transmission gear is positioned on the sine transmission wheel fixedly-connected sliding rod, the sine transmission wheel fixedly-connected sliding rod can slide up and down, and the sine transmission wheel fixedly-connected sliding rod is used for controlling the meshing of the sine component.
7. A composite frequency structural vibration pulse simulation apparatus according to claim 2, wherein: the cosine component comprises a second rack, a first cosine transmission gear, a second cosine transmission gear, a third cosine transmission gear and a cosine transmission wheel fixedly-connected sliding rod, the second rack is fixedly arranged at the upper left end of the transverse follow-up sliding rod, teeth are arranged at the end of the cosine hydraulic push rod, the first cosine transmission gear is meshed with the second rack, the third cosine transmission gear is meshed with the teeth of the cosine hydraulic push rod, the second cosine transmission gear is positioned on the cosine transmission wheel fixedly-connected sliding rod, the cosine transmission wheel fixedly-connected sliding rod can slide left and right, and the cosine transmission wheel fixedly-connected sliding rod is used for controlling the meshing of the cosine component.
8. A composite frequency structural vibration pulse simulation apparatus according to claim 1, wherein: the multidirectional hydraulic assembly further comprises a plurality of direction locking knobs, the direction locking knobs are in one-to-one correspondence with the vibration output ends, and the direction locking knobs are used for controlling the on-off of the vibration output ends.
9. A composite frequency structural vibration pulse simulation apparatus according to claim 1, wherein: multidirectional hydraulic component still includes a plurality of variable direction pulse vibration subassemblies, variable direction pulse vibration subassembly includes the fixed lock of variable direction pulse push rod, direction skew gear, ring channel base and direction, the ring channel base is fixed the outside of multidirectional hydraulic pressure pipe, the one end of variable direction pulse push rod can along the ring channel base slides, be equipped with the straight-tooth on the external diameter of variable direction pulse push rod, the external diameter of pulse vibration push rod also is equipped with the straight-tooth, direction skew gear respectively with variable direction pulse push rod with the straight-tooth meshing of pulse vibration push rod, the fixed lock of direction is used for the locking to be located on the ring channel base variable direction pulse push rod.
10. A composite frequency structural vibration pulse simulation apparatus according to claim 1, wherein: the support assembly is used for supporting the vertically placed structural vibration pulse simulation device with the composite frequency and comprises a first support and a second support, the first support is used for supporting the vibration pulse excitation unit, and the second support is used for supporting the multidirectional hydraulic assembly.
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| CN113457958A (en) * | 2021-07-12 | 2021-10-01 | 重庆建安仪器有限责任公司 | Pressure wave generating device based on fan |
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