CN110375943A - A kind of horizontal impact response spectra table top and its design method based on emulation - Google Patents
A kind of horizontal impact response spectra table top and its design method based on emulation Download PDFInfo
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- CN110375943A CN110375943A CN201910548397.0A CN201910548397A CN110375943A CN 110375943 A CN110375943 A CN 110375943A CN 201910548397 A CN201910548397 A CN 201910548397A CN 110375943 A CN110375943 A CN 110375943A
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- table top
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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
- G01M7/08—Shock-testing
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of horizontal impact response spectra table top and its design method based on emulation, which includes: pedestal, multiple bearing fixing devices, is set on the pedestal;Two bearings being set parallel to each other are set on the bearing fixing device and can move upwards on the bearing fixing device along with perpendicular horizontal of the axial direction of the bearing with the lateral distance between two bearings of adjustment;Multiple support portions, and can sliding axially along the bearing on the bearing;At least one table top portion is set on the support portion;Plate portion is set in the table top portion.
Description
Technical field
The present invention relates to the technical fields of the design method of shock environmental test device core component, particularly relate to a kind of base
In the horizontal impact response spectra mesa designs and adjustment method of emulation.
Background technique
There are many Fire load on precision instrument, these priming systems can generate the pyroshock environment of high frequency sound, high-magnitude.
Severe pyroshock environment seriously threatens the safety of Sensitive Apparatus, may cause the damage of unrepairable, is that harm is accurate
One of the principal element of instrument safe handling.Effectively simulated explosion shock environment, to precision instrument and sensitivity device into
The examination of row ground experiment is that equipment investment uses the preceding essential stage.Due to the uncertainty and impact of pyroshock environment
The randomness of waveform, current testing equipment are difficult to simulated explosion impact time domain waveform.Shock response spectrum can indicate with standardizing
Different magnitude of shock environment, becomes one of the main indicator of description blast impulse, and spectral line has concise, uniformly, intuitively etc.
Advantage.Therefore, shock response spectrum test is increasingly becoming the major way of simulated explosion shock environment.
Shock response spectrum is defined as a series of different single-mode system of intrinsic frequencies and swashs in blast impulse time domain waveform
It encourages down, peak response acceleration spectral line varying with frequency.Shock response spectrum mainly can be used as complicated oscillatory surge waveform
Equivalent merit, currently used wide one of pyroshock test method.
Shock response spectrum table top once form, intrinsic frequency etc. i.e. determined, dynamical system (such as: pendulum punching
Hit the height that the pendulum of response spectra has been put, the Pneumatic pressure of horizontal hammer type shock response spectrum pneumatic hammer) determine in the case where, impact
The limit magnitude of response spectra, inflection point etc. be also it is determining, i.e., adjustability is poor, cannot pass through tune in the case where other conditions are certain
Whole table top further expands the limit capacity of shock response spectrum equipment.
The limit capacity of shock response spectrum equipment depend on dynamical system (such as: the pendulum of Charpy response spectra pendulum
The height risen, the Pneumatic pressure of horizontal hammer type shock response spectrum pneumatic hammer), back cushion etc., table top etc., the table top one of existing equipment
As be made into it is nonadjustable, practical upper table surface be influence shock response spectrum limit capacity an important factor for, it should in the adjustable of table top
Examination, can group close and do a few thing to improve the limit capacity of shock response spectrum.
Existing shock response spectrum countertop segment is non-adjustable, limit magnitude, inflection point etc. be it is determining, just more than its limit
It is helpless, the limit capacity of horizontal impact platform shock response spectrum cannot be further expanded by adjusting, combination table top.
To solve drawbacks described above, it is necessary to propose a kind of horizontal impact response spectra mesa designs based on emulation and debugging side
Method.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of horizontal impact response spectra mesa designs and tune based on emulation
Method for testing, table top can be made into it is adjustable, combined, table top impact response spectrum influence can carry out simulation analysis,
The method that a set of adjustment combination table top is formed according to simulation result, can extend its limit energy by combining, adjusting serial table top
Power meets the requirement of experimental condition.
To achieve the above object, the horizontal impact response spectra table top based on emulation that the invention proposes a kind of, wherein described
Horizontal impact response spectra table top includes:
Pedestal,
Multiple bearing fixing devices are set on the pedestal;
Two bearings being set parallel to each other, and can be in the bearing fixing device on the bearing fixing device
Perpendicular horizontal of the axial direction of upper edge and the bearing is moved upwards to adjust the lateral distance between two bearings;
Multiple support portions, and can sliding axially along the bearing on the bearing;
At least one table top portion is set on the support portion;
Plate portion is set in the table top portion.
Horizontal impact response spectra table top based on emulation as described above, wherein the bearing fixing device includes:
Fixed part, offers the groove for carrying the bearing thereon and the bearing can be in the groove along described
It is horizontal to move upwards,
T-slot portion is convexly equipped in the lower end of the fixed part and is interlocked with the pedestal.
Horizontal impact response spectra table top based on emulation as described above, wherein the support portion include support ontology and
What is opened up in the support ontology can be along the sliding slot in axial sliding of the bearing.
Horizontal impact response spectra table top based on emulation as described above, wherein further include set opposite with the table top portion
The tup set.
Horizontal impact response spectra table top based on emulation as described above, wherein the horizontal impact response spectra table top packet
Include four support portions and four bearing fixing devices, wherein four support portions are respectively arranged on the four of the table top portion
A corner, four bearing fixing devices are respectively arranged on two ends of two bearings.
Horizontal impact response spectra table top based on emulation as described above, wherein the horizontal impact response spectra table top packet
Multiple table top portions are included, multiple table top portions are connected by connector.
The invention also provides a kind of design method of horizontal impact response spectra table top based on emulation as described above,
In, the design method includes:
S1): multiple bearing fixing devices are fixedly arranged on pedestal;
S2): two bearings are set on the bearing fixing device in a manner of parallel to each other and can transversely move,
Wherein, the transverse direction and the axial direction of the bearing are perpendicular;
S3): by multiple support portions by can along the bearing in axial sliding in a manner of be set on the bearing;
S4): table top portion is set on the support portion;And
S5): plate portion is layed in the table top portion.
Design method as described above, wherein the bearing fixing device includes:
Fixed part and T-slot portion with the lower end for being convexly equipped in the fixed part, are used to carry by opening up on the fixed part
The groove of the bearing, the bearing can in the groove along it is described it is horizontal move upwards with adjust two bearings between axle center
Distance, the T-slot portion are interlocked with the pedestal.
Design method as described above, wherein the support portion includes support ontology and opens up in the support ontology
Sliding slot, the sliding slot can sliding axially to adjust two be oppositely arranged on same bearing two supports along the bearing
Fore-and-aft distance between portion.
Design method as described above, wherein the one end in the table top portion is provided with the tup being arranged corresponding thereto.
For the problem that background demand, existing technology and exist, it is an object of the invention to simulation analysis table tops to liquidate
It hits on the basis of the influence of response spectra, provides a set of mesa designs method for combining table top, adjustable, and be given at other
Its limit capacity is expanded by the adjustment combination of table top in the case that part is certain.With that can combine, flexible, debugging is convenient, other
The advantages that condition certain impact response spectra limit capacity is expansible.
In addition, the horizontal impact response spectra table top of the invention based on emulation has the advantages that
(1) it can combine flexibly;
(2) debugging is convenient;
(3) the advantages that other condition certain impact response spectra limit capacities are expansible.
(4) it dismantles easy for installation.
Compared with prior art, the design method of the horizontal impact response spectra table top of the invention based on emulation has as follows
Advantage:
(1) the horizontal impact response spectra table top before is non-adjustable, realizes that table top is adjustable for the first time;
(2) the horizontal impact response spectra table top before can not combine, and table top can be combined for the first time by realizing;
(3) table top can be combined according to selections such as product size weights;
(4) adjustable combination table top expands capacity of equipment to meet experimental condition.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the horizontal impact response spectra table top based on emulation of the embodiment of the present invention;
Fig. 2 is the schematic diagram of longitudinal pitch provided in an embodiment of the present invention;
Fig. 3 is the schematic diagram of horizontal spacing provided in an embodiment of the present invention;
Fig. 4 is the process of the design method of the horizontal impact response spectra table top provided in an embodiment of the present invention based on emulation
Figure;
Fig. 5 is the frequency of the embodiment of the present invention and the relational graph of shock response.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that when we claim element to be " connected " or " coupling
Connect " to another element when, it can be directly connected or coupled to other elements, or there may also be intermediary elements.In addition, this
In " connection " or " coupling " that uses may include being wirelessly connected or wireless coupling.Wording "and/or" used herein includes one
A or more associated whole for listing item or any cell and all combination.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The non-equal entity of a same names or non-equal parameter, it is seen that " first " " second " only for the convenience of statement, does not answer
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
The technical solution for embodiment that the invention will now be described in detail with reference to the accompanying drawings.
As shown in Figure 1 to Figure 3, the horizontal impact response spectra table top based on emulation that the invention proposes a kind of, wherein the water
Flat shock response spectrum table top includes:
Pedestal 1;Multiple bearing fixing devices 2 are set on pedestal 1;Two bearings 3 being set parallel to each other, are set to
On bearing fixing device 2 and it can move upwards on bearing fixing device 2 along with perpendicular horizontal of the axial direction of bearing 3 to adjust two
Lateral distance between a bearing 3;Multiple support portions 4, and can sliding axially along bearing 3 on bearing 3;At least
One table top portion 5 is set on support portion 4;Plate portion 6 is set in table top portion 5.
In one embodiment, the bearing fixing device 2 in the present invention includes: fixed part 21, offers be used for thereon
Carrying the groove of the bearing and bearing 3 horizontal can move upwards in the groove along described;T-slot portion 22, is convexly equipped in fixation
The lower end in portion 21 is simultaneously interlocked with pedestal 1.
Further, in one embodiment, support portion 4 includes support ontology 41 and opens up in support ontology 41
It can be along the sliding slot in axial sliding of bearing 3.
Further, the horizontal impact response spectra table top based on emulation in the present invention further includes sets opposite with table top portion 5
The tup 7 set.
Preferably, as shown in Figure 1, in a particular embodiment, horizontal impact response spectra table top of the invention includes four branch
Support part 4 and four bearing fixing devices 2, wherein four support portions 4 are respectively arranged on the four corners in table top portion 5, and four bearings are solid
Determine two ends that device 2 is respectively arranged on two bearings 3.Certainly, the number of support portion of the invention and bearing fixing device is simultaneously
Four are not limited to, other numbers can also be arranged to certainly, such as six, eight or other numbers, in the present invention to its number
It is not limited, is all within the scope of the present invention.
Preferably, horizontal impact response spectra table top of the invention includes multiple table top portions, and multiple table top portions pass through connector
Connect, to realize that multiple table top portions are overlapped mutually together.
A kind of horizontal impact response spectra table top based on emulation proposed by the present invention has the advantages that
(1) it can combine flexibly;
(2) debugging is convenient;
(3) the advantages that other condition certain impact response spectra limit capacities are expansible.
(4) it dismantles easy for installation.
The invention also provides a kind of design methods of above-mentioned horizontal impact response spectra table top based on emulation, wherein
The design method includes the following steps:
S1): multiple bearing fixing devices are fixedly arranged on pedestal;
S2): two bearings are set on bearing fixing device in a manner of parallel to each other and can transversely move,
In, the transverse direction and the axial direction (being referred to as longitudinal direction) of bearing are perpendicular;
S3): by multiple support portions by can along bearing in axial sliding in a manner of be set on bearing;
S4): table top portion is set on support portion;And
S5): plate portion is layed in table top portion.
The present invention is described in detail now in conjunction with attached drawing 1-4, so that the present invention is clearer.
For the problem that background demand, existing technology and exist, it is an object of the invention to simulation analysis table tops to liquidate
It hits on the basis of the influence of response spectra, provides a set of mesa designs method for combining table top, adjustable, and be given at other
Its limit capacity is expanded by the adjustment combination of table top in the case that part is certain.With that can combine, flexible, debugging is convenient, other
The advantages that condition certain impact response spectra limit capacity is expansible.
To achieve the goals above, the technical solution adopted by the present invention includes the emulation point that table top impact response spectrum influences
Analysis, mesa designs method, table top combine adjustment method three parts.
One, other conditions are certain, the simulation analysis result that table top impact response spectrum influences
It is concluded that after simulation analysis
(1) by the simulation result comparative analysis of table top modal frequency and shock response spectrum inflection point, table top modal frequency and
The break frequency of shock response spectrum is positively correlated, i.e. the modal frequency of table top is higher, shock response in the case that other conditions are certain
Break frequency (the i.e. frequency f in Fig. 5 of spectrum2) higher.
(2) pass through simulation analysis: the axle center distance (lateral distance) of bearing remains unchanged, with the glide direction of bearing
The increase of (longitudinal direction) two sliding block spacing, modal frequency can gradually be incremented by, accordingly the shock response spectrum when other conditions are constant
Break frequency also increases accordingly.
(3) pass through simulation analysis: two sliding block of glide direction (i.e.) spacing (longitudinal pitch) remains unchanged, with BEARING SHAFT
The increase of distance (lateral distance), modal frequency can gradually be incremented by, the break frequency of shock response spectrum when other conditions are constant
Also corresponding to increase.
(4) modal frequency of the table top of same thickness, the corresponding order of table top bigger (length and width are identical) is lower, i.e., other conditions
Centainly, the break frequency of the table top of same thickness, bigger (length and width the are identical) shock response spectrum of table top is lower.
The modal frequency of the table top (length and width are identical) of same size, the more thick corresponding order of table top is higher.I.e. other conditions one
Determine, the table top (length and width are identical) of same size, the break frequency of the thicker shock response spectrum of table top is higher.
(5) the increased square plate of former table top is bigger, thicker, and the modal frequency of corresponding order can be caused to increase.It is i.e. other
Condition is certain, by adding corresponding plate size on table top, thickness the break frequency of shock response spectrum can be improved.
(6) other conditions are certain, can be increased by break frequency after the additional mass on table top, but impact magnitude and have institute
Decline.
(7) in the case that other conditions are certain, table top total quality is smaller, and shock response spectrum magnitude is higher.
Two, mesa designs method
According to the simulation analysis influenced with upper table surface impact response spectrum as a result, carrying out setting for horizontal impact response spectra table top
Meter.
(1) longitudinal pitch of the table top on sliding bearing is adjustable, be adjustable to table top close to edge.(according to emulation point
Analysis is as a result, the modal frequency of the bigger table top of longitudinal pitch on sliding bearing is higher, i.e., other conditions are certain, and shock response spectrum turns
Dot frequency is higher);That is, support portion 4 include support ontology 41 and opened up in support ontology 41 can along bearing 3 axial direction it is sliding
Dynamic sliding slot, the different table top of replacement size thickness, sliding slot can sliding axially to adjust two on same bearing along bearing
The fore-and-aft distance between two support ontologies 41 being oppositely arranged adjusts longitudinal direction to realize through table top and support portion 4 (being spirally connected)
Distance.
(2) horizontal spacing of the table top on sliding bearing is adjustable, be adjustable to table top close to edge.(according to emulation point
Analysis is as a result, the modal frequency of the bigger table top of horizontal spacing on sliding bearing is higher, i.e., other conditions are certain, and shock response spectrum turns
Dot frequency is higher);That is, in an embodiment of the present invention, above-mentioned bearing fixing device include: fixed part 21 and be convexly equipped in institute
The T-slot portion 22 of the lower end of fixed part is stated, offering on fixed part 21 can be in the groove for the groove and bearing 3 of loading bearing
It is interior horizontal to be moved upwards along described;T-slot portion 22 is convexly equipped in the lower end of fixed part 21 and is interlocked with pedestal 1, by bearing 3 recessed
It is transversely upper in slot to move to realize that horizontal spacing of the table top on sliding bearing is adjustable.
(3) table top forms the series of size, can select table top according to product size, experimental condition;
(4) it can be combined between table top by screw, screw, screw hole generalization.
(5) sliding bearing horizontal spacing is adjusted by sliding in T-slot.
(6) the sliding bearing longitudinal pitch table top different by replacement size thickness, then by fixed between table top and bearing
Device (being spirally connected) is adjusted.
Three table tops combine adjustment method
(1) break frequency of axle center distance (lateral distance) Lai Tigao shock response spectrum of bearing is adjusted.
(2) break frequency of glide direction two sliding block spacing (longitudinal pitch) Lai Tigao shock response spectrum is adjusted.
(3) it is combined by selection table top pedestal and expandable portion, break frequency higher examination larger to magnitude
Condition is tested, the mesa thickness after combination is larger, and table top is smaller, and total quality is smaller.
(4) increase square plate (expandable portion) on the pedestal of former table top, in other one timings of condition, by attached on table top
Add corresponding plate size, thickness that the break frequency of shock response spectrum can be improved.
Illustrate:
(1) it only adjusts combined angle from table top more than to go to debug, the debugging of shock response spectrum test spectrum is also hammered into shape
The influence of the factors such as the felt between the impact force size of head, the soft or hard thin and thick of back cushion, tup and table top needs comprehensive progress
Debugging;
(2) table top series base part and expandable portion can be collocated with each other combination between different series
Series 1
400mm (length) × 400mm (width) × 30mm (thickness) --- base part
400mm (length) × 400mm (width) × 10mm (thickness) × 6 (a) --- expandable portion
Series 2
500mm (length) × 500mm (width) × 30mm (thickness) --- base part
500mm (length) × 500mm (width) × 10mm (thickness) × 6 (a) --- expandable portion
Series 3
600mm (length) × 600mm (width) × 30mm (thickness) --- base part
600mm (length) × 600mm (width) × 10mm (thickness) × 6 (a) --- expandable portion
Series 4
700mm (length) × 700mm (width) × 30mm (thickness) --- base part
700mm (length) × 700mm (width) × 10mm (thickness) × 6 (a) --- expandable portion
Series 5
800mm (length) × 800mm (width) × 30mm (thickness) --- base part
800mm (length) × 800mm (width) × 10mm (thickness) × 6 (a) --- expandable portion
The impact analysis of the above only table top impact response spectrum is as a result, in addition to shock response spectrum will receive the influence of table top
Outside, shock response spectrum is also influenced by back cushion, impact pulsewidth, impact peak value etc..Table top impact response is only discussed here
The influence of spectrum.
Compared with prior art, the design method of the horizontal impact response spectra table top of the invention based on emulation has as follows
Advantage:
(1) the horizontal impact response spectra table top before is non-adjustable, realizes that table top is adjustable for the first time;
(2) the horizontal impact response spectra table top before can not combine, and table top can be combined for the first time by realizing;
(3) table top can be combined according to selections such as product size weights;
(4) adjustable combination table top expands capacity of equipment to meet experimental condition;
Those skilled in the art of the present technique have been appreciated that in the present invention the various operations crossed by discussion, method, in process
Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with having been crossed by discussion in the present invention
Kind of operation, method, other steps, measures, and schemes in process may also be alternated, changed, rearranged, decomposed, combined or deleted.
Further, in the prior art to have and the step in various operations, method disclosed in the present invention, process, measure, scheme
It may also be alternated, changed, rearranged, decomposed, combined or deleted.It should be understood by those ordinary skilled in the art that: to take up an official post
The discussion of what embodiment is exemplary only, it is not intended that implies that the scope of the present disclosure (including claim) is limited to these examples
Son;Under thinking of the invention, it can also be combined, walk between the technical characteristic in above embodiments or different embodiments
Suddenly it can be realized with random order, and there are many other variations of different aspect present invention as described above, for simplicity
They are not provided in details.Therefore, all within the spirits and principles of the present invention, any omission for being made, modification, equivalent
Replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of horizontal impact response spectra table top based on emulation, which is characterized in that the horizontal impact response spectra table top includes:
Pedestal,
Multiple bearing fixing devices are set on the pedestal;
Two bearings being set parallel to each other, be set to the bearing fixing device on and can on the bearing fixing device edge
It moves upwards with perpendicular horizontal of the axial direction of the bearing to adjust the lateral distance between two bearings;
Multiple support portions, and can sliding axially along the bearing on the bearing;
At least one table top portion is set on the support portion;
Plate portion is set in the table top portion.
2. the horizontal impact response spectra table top based on emulation as described in claim 1, which is characterized in that the fixed dress of the bearing
It sets and includes:
Fixed part, offers the groove for carrying the bearing thereon and the bearing can be in the groove along the transverse direction
Upper movement,
T-slot portion is convexly equipped in the lower end of the fixed part and is interlocked with the pedestal.
3. the horizontal impact response spectra table top based on emulation as described in claim 1, which is characterized in that the support portion includes
Support ontology and it is described support ontology in open up can be along the sliding slot in axial sliding of the bearing.
4. the horizontal impact response spectra table top based on emulation as described in claim 1, which is characterized in that further include and described
The tup that face is oppositely arranged.
5. the horizontal impact response spectra table top based on emulation according to any one of claims 1 to 4, which is characterized in that institute
Stating horizontal impact response spectra table top includes four support portions and four bearing fixing devices, wherein four support portions
The four corners in the table top portion are respectively arranged on, four bearing fixing devices are respectively arranged on two ends of two bearings
Portion.
6. the horizontal impact response spectra table top based on emulation according to any one of claims 1 to 4, which is characterized in that institute
Stating horizontal impact response spectra table top includes multiple table top portions, and multiple table top portions are connected by connector.
7. a kind of design method of such as horizontal impact response spectra table top described in any one of claims 1 to 6 based on emulation,
It is characterized in that, the design method includes:
S1): multiple bearing fixing devices are fixedly arranged on pedestal;
S2): two bearings are set on the bearing fixing device in a manner of parallel to each other and can transversely move,
In, the transverse direction and the axial direction of the bearing are perpendicular;
S3): by multiple support portions by can along the bearing in axial sliding in a manner of be set on the bearing;
S4): table top portion is set on the support portion;And
S5): plate portion is layed in the table top portion.
8. design method as claimed in claim 7, which is characterized in that the bearing fixing device includes:
Fixed part and T-slot portion with the lower end for being convexly equipped in the fixed part, will be opened up on the fixed part be used to carry it is described
The groove of bearing, the bearing can in the groove along it is described it is horizontal move upwards with adjust two bearings between distance of shaft centers
From the T-slot portion is interlocked with the pedestal.
9. design method as claimed in claim 8, which is characterized in that the support portion includes supporting ontology and in the support
The sliding slot opened up in ontology, the sliding slot can sliding axially to adjust two and be oppositely arranged on same bearing along the bearing
Two support portions between fore-and-aft distance.
10. the design method as described in any one of claim 7 to 9, which is characterized in that be arranged in the one end in the table top portion
There is the tup being arranged corresponding thereto.
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CN114088329A (en) * | 2021-11-25 | 2022-02-25 | 北京卫星环境工程研究所 | Quick adjustment method for inflection point frequency of resonant table top of vertical impulse response spectrum |
CN114088329B (en) * | 2021-11-25 | 2023-04-21 | 北京卫星环境工程研究所 | Quick adjustment method for inflection point frequency of vertical impact response spectrum resonant table top |
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Application publication date: 20191025 |