CN105133744A - Tuned mass damper structure with continuously variable frequency - Google Patents
Tuned mass damper structure with continuously variable frequency Download PDFInfo
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- CN105133744A CN105133744A CN201510627901.8A CN201510627901A CN105133744A CN 105133744 A CN105133744 A CN 105133744A CN 201510627901 A CN201510627901 A CN 201510627901A CN 105133744 A CN105133744 A CN 105133744A
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- resiliency supported
- sliding part
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Abstract
The invention discloses a tuned mass damper structure with continuously variable frequency. The tuned mass damper structure comprises a main mass block, a guide mechanism, a constant-stiffness elastic support, a damping unit and a base, wherein the main mass block and the base together constitute a main support structure; the tuned mass damper structure further comprises a stiffness-adjustable elastic support positioned between the main mass block and the base; the stiffness-adjustable elastic support comprises an elastic beam, a sliding part and a fastening piece; the right end of the elastic beam is fixedly mounted on the base; the sliding part is mounted on the main support structure in a position-adjustable manner and can slide in the longitudinal direction of the elastic beam; the fastening piece is used for fixing the sliding part on the main support structure after the sliding part slides to a set position. The tuned mass damper structure has the advantages that stepless adjustment of the support stiffness can be realized in a larger range, tuned mass damper products with the same models can meet vibration damping requirements of base structures of different vibration frequency and also can be used for reducing vibration of base structures with time variable vibration frequency.
Description
Technical field
The invention belongs to vibration isolation technique field, more specifically, relate to a kind of damping unit.
Background technology
Tuned mass damper is a kind of passive-type vibration absorber be widely adopted in recent years, due to its simple structure, use time without the need to advantages such as external energy input, good stabilities, the micro-vibration isolation and the plant equipment that are widely used in civil engineering structure subtract the fields such as vibration isolation.
Tuned mass damper by mass, spring and damping system three part form.By the natural frequency of tuned mass damper is adjusted near controlled structure frequency, to change by the resonance characteristics of control structure, thus by controlled structural vibrational energy transfer on tuned mass damper, then fallen by the energy dissipation of damping unit by transfer, to reach the object reducing controlled structural vibration.
Tuned mass damper only just can reach best effectiveness in vibration suppression near optimal design frequency, but, due to the impact of the factor such as Engineering Vibration, construction error, by the actual intrinsic frequency of control structure inevitably and design load there is deviation, this will cause passive tuning class damping unit effectiveness in vibration suppression obviously to decline even losing efficacy.
Existing passive tuned mass damper carrys out quality of regulation often by the quantity of increase and decrease steel plate or adjusts active spring coils number to adjust rigidity, its tuning range very limited (be no more than ± 15%), and major part can not continuously fine adjustment, be difficult to adapt to different vibration frequency needs.
Summary of the invention
Resonant frequency for existing tuned mass damper product unadjustable in other words can not continuously fine adjustment, be difficult to the defect adapting to different vibration frequency needs, the invention provides the tuned mass damper device that a kind of resonant frequency can regulate continuously, it can under the prerequisite of any component do not changed or change product, regulate the resonant frequency of product on a large scale continuously, make it accurately consistent with the vibration frequency of institute installation site practical structures, thus reach best shock attenuation result.
For achieving the above object, according to the present invention, providing a kind of frequency can continually varying tuned mass damper, comprise parenchyma gauge block, guiding mechanism, determine rigidity resiliency supported, damping unit and base, described parenchyma gauge block and base form main supporting structure jointly, described guiding mechanism, determine rigidity resiliency supported, damping unit and be arranged on respectively on described main supporting structure, it is characterized in that
Also comprise the adjustable rigidity resiliency supported between described parenchyma gauge block and described base, described adjustable rigidity resiliency supported comprises spring beam, sliding part and securing member, wherein, the right-hand member of described spring beam is fixedly mounted on described base, its left end passes described sliding part and its upper surface and/or lower surface can contact with described sliding part when tuned mass damper vibrates, described slide positions is arranged on adjustably also can along the longitudinal sliding motion of described spring beam on described main supporting structure, sliding part is fixed on described main supporting structure by described securing member after sliding into desired location at described sliding part.
Preferably, described guiding mechanism comprises slide block and guide rod, and described slide block is fixedly mounted on described parenchyma gauge block, and described guide rod is vertically arranged and its lower end is fixedly mounted on described base, described slide block along the longitudinal sliding motion of described guide rod, vertically can move to make described parenchyma gauge block.
Preferably, describedly determine rigidity resiliency supported and comprise spring, described spring is installed on described guiding mechanism, and its upper end is resisted against on described parenchyma gauge block, and its lower end abutment is on described base;
Described parenchyma gauge block is provided with chute, described chute is T-shaped, it comprises the first larger chute of width and less the second chute of width, correspondingly, described sliding part entirety is T-shaped, and it comprises first sliding part that can slide in the first chute and second sliding part that can slide in the second chute; Described securing member is locking nut, and it is threaded on described second sliding part and also described sliding part can be locked on described parenchyma gauge block.
Preferably, lowest vibration set of frequency during described tuned mass damper work is f
1, maximum frequency of oscillation is set to f
2, parenchyma gauge block quality settings is m, determine the quantity of rigidity resiliency supported and adjustable rigidity resiliency supported is all set to n, coupling determines the rigidity of rigidity resiliency supported and adjustable rigidity resiliency supported in accordance with the following methods:
Determine the rigidity k of single spring in rigidity resiliency supported
sbe no more than k
1=4 π
2mf
1 2/ n, and the rigidity k of single spring
smeet 0.6k
1≤ k
s≤ 0.8k
1; The minimum rigidity k of single spring beam in adjustable rigidity resiliency supported
b1meet k
b1=k
1-k
s, the highest rigidity k
b2meet k
b2=k
2-k
s=4 π
2mf
2 2/ n-k
s, be also the maximum effective length L of single spring beam in adjustable rigidity resiliency supported
maxmeet
minimum effective length L
minmeet
wherein E and I is distributed as young's modulus of elasticity and the second moment of area of spring beam.
Preferably, describedly determine rigidity resiliency supported and comprise spring, described spring is installed on described guiding mechanism, and its upper end is resisted against on described parenchyma gauge block, and its lower end abutment is on the upper surface of described crossbeam left end;
Described base is provided with chute, described chute is inverted T-shaped, it comprises the first larger chute of width and less the second chute of width, correspondingly, described sliding part entirety is in inverted T-shaped, and it comprises first sliding part that can slide in the first chute and second sliding part that can slide in the second chute; Described securing member is locking nut, and it is threaded on described second sliding part and also described sliding part can be locked on described parenchyma gauge block.
Preferably, lowest vibration set of frequency during described tuned mass damper work is f
1, maximum frequency of oscillation is set to f
2, parenchyma gauge block quality settings is m, determine the quantity of rigidity resiliency supported and adjustable rigidity resiliency supported is all set to n, coupling determines the rigidity of rigidity resiliency supported and adjustable rigidity resiliency supported in accordance with the following methods:
Determine the rigidity k of single spring in rigidity resiliency supported
sbe not less than k
2=4 π
2mf
2 2/ n, and the rigidity k of single spring
smeet 1.5k
2≤ k
s≤ 2k
2; The highest rigidity k of single spring beam in adjustable rigidity resiliency supported
b2meet k
b2=1/ (1/k
2-1/k
s), the minimum rigidity k of single spring beam in adjustable rigidity resiliency supported
b1meet k
b1=1/ (1/k
1-1/k
s), be also the maximum effective length L of single spring beam in adjustable rigidity resiliency supported
maxmeet
Minimum effective length L
minmeet
Wherein E and I is distributed as young's modulus of elasticity and the second moment of area of spring beam.
Preferably, the compressible stroke that described spring is downward is no less than 15mm.
Preferably, the quantity of described adjustable rigidity resiliency supported is multiple and these adjustable rigidity resiliency supported circumferences are evenly arranged.
Preferably, the quantity of adjustable rigidity resiliency supported is four and these adjustable rigidity resiliency supported are arranged in squares.
Preferably, described damping unit is piston type damping unit, viscoelastic material damping unit, magnetorheological damping unit or electromagnetic type damping unit, and the total damping ratio of damping unit is to be not less than 0.05, not higher than 0.15.
In general, the above technical scheme conceived by the present invention compared with prior art, can obtain following beneficial effect:
1) the present invention can under the prerequisite not changing parenchyma gauge block or elastic support structure component, regulate the support stiffness of tuned mass damper continuously, vibration frequency under making the resonant frequency of tuned mass damper and foundation structure is in working order accurately consistent, thus improves the resonance effect of system;
2) the present invention can realize the step-less adjustment of support stiffness in the larger context, thus ensure that the tuned mass damper product of same model may be used for the vibration damping demand of the foundation structure of different vibration frequency, the foundation structure vibration damping become when also can be used for vibration frequency.
Accompanying drawing explanation
Fig. 1 and Fig. 2 is the sectional view of the embodiment of the present invention one, and wherein, Fig. 1 is the sectional view along A-A line in Fig. 2, and Fig. 2 is the echelon sectional view along B-B line in Fig. 1;
Fig. 3 and Fig. 4 is the sectional view of the embodiment of the present invention two, and wherein, Fig. 3 is the sectional view along C-C line in Fig. 4, and Fig. 4 is the echelon sectional view along D-D line in Fig. 3.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
Embodiment one
With reference to Fig. 1, Fig. 2, a kind of frequency can continually varying tuned mass damper, comprise parenchyma gauge block 11, guiding mechanism 12, determine rigidity resiliency supported 13, damping unit 15 and base 16, described parenchyma gauge block 11 and base 16 form main supporting structure jointly, described guiding mechanism 12, determine rigidity resiliency supported 13, damping unit 15 is arranged on described main supporting structure respectively, damping unit 15 and guiding mechanism 12 are arranged between parenchyma gauge block 11 and base 16 respectively, the former plays absorbing vibrational energy, and the latter plays restriction parenchyma gauge block 11 direction of motion.In addition, also comprise the adjustable rigidity resiliency supported 14 between described parenchyma gauge block 11 and described base 16, described adjustable rigidity resiliency supported 14 comprises spring beam 141, sliding part 142 and securing member, wherein, the right-hand member of described spring beam 141 is fixedly mounted on described base 16, and its left end passes described sliding part 142 and its upper surface and/or lower surface can contact with described sliding part 142 when tuned mass damper vibrates.Therefore, when initially not vibrating, namely before tuned mass damper vibration, the upper surface of spring beam 141 can contact with elastic component 142 all the time with lower surface, or spring beam 141 also can be only have upper surface to contact all the time before vibration, and lower surface and sliding part 142 keep as far as possible little gap, be advisable to be no more than 0.1mm, or spring beam 141 can also be only have lower surface to contact to contact all the time before vibration, and upper surface and sliding part 142 keep as far as possible little gap, being advisable to be no more than 0.1mm; Or before vibration, spring beam 141 also can be upper surface and lower surface all keep as far as possible little gap with sliding part 142, is advisable to be no more than 0.1mm, anyway will ensure that upper surface and/or lower surface want to contact with sliding part 142 when tuned mass damper vibrates.
Described sliding part 142 position is arranged on adjustably also can along the longitudinal sliding motion of described spring beam 141 on described main supporting structure, and sliding part 142 is fixed on described main supporting structure by described securing member after sliding into desired location at described sliding part 142.Preferably, described base 16 comprises pedestal 161, spring beam Connection Block 162 and damping unit lower connecting plate 163, and described spring beam Connection Block 162 is arranged on described pedestal 161, and described damping unit lower connecting plate 163 is for connecting the lower end of damping unit 15.
The present embodiment determine rigidity resiliency supported 13 and adjustable rigidity resiliency supported 14 is fixedly connected between parenchyma gauge block 11 and base 16 in parallel.Determine rigidity resiliency supported 13 play balance parenchyma gauge block 11 gravity and a part of support stiffness is provided.Adjustable rigidity resiliency supported 14 is made up of spring beam 141 and sliding part 142, as shown in the figure, the right-hand member of sliding part 142 to the distance of the left end of spring beam Connection Block 162 is effective lengths of adjustable rigidity resiliency supported 14, remember that its value is L, then the vertical actual effective rigidity of adjustable rigidity resiliency supported 14 is k
b=3EI/L
3.The position of mobile sliding part 142 means the effective length L changing adjustable rigidity resiliency supported 14, also the support stiffness of spring beam 141 actual contribution is namely changed, thus can the resonant frequency of regulating system on a large scale continuously, make it accurately consistent with the structural vibration frequency of institute installation site, thus reach best shock attenuation result.
Preferably, described guiding mechanism 12 comprises slide block 122 and guide rod 121, described slide block 122 is fixedly mounted on described parenchyma gauge block 11, described guide rod 121 vertically arranges and its lower end is fixedly mounted on described base 16, described slide block 122 along the longitudinal sliding motion of described guide rod 121, vertically can move to make described parenchyma gauge block 11.Preferably, parenchyma gauge block 11 comprises mass main body 111, slide attachment plate 112 and damping unit upper junction plate 113, described slide attachment plate 112 and damping unit upper junction plate 113 are all fixedly mounted on described slide attachment plate 112, described slide block 122 is fixedly mounted on described slide attachment plate 112, and described damping unit upper junction plate 113 is for connecting the upper end of described damping unit 15.
Preferably, describedly determine rigidity resiliency supported 13 and comprise spring 131, described spring 131 is installed on described guiding mechanism 12, and its upper end is resisted against on described parenchyma gauge block 11, and its lower end abutment is on described base 16;
Described parenchyma gauge block 11 is provided with chute, described chute is T-shaped, it comprises the first larger chute of width and less the second chute of width, correspondingly, described sliding part 142 is overall T-shaped, and it comprises first sliding part that can slide in the first chute and second sliding part that can slide in the second chute; Described securing member is locking nut 143, and it is threaded on described second sliding part and also described sliding part 142 can be locked on described parenchyma gauge block 11.
In addition, also can adopt the mode that guide rail coordinates with sliding part, and securing member also can adopt wing bolt, and sliding part arranges chute, then wing bolt is connected on parenchyma gauge block through after chute, utilizes wing nut to lock sliding part after sliding part also can be made to move to correct position.
Preferably, lowest vibration set of frequency during described tuned mass damper work is f
1, maximum frequency of oscillation is set to f
2, parenchyma gauge block 11 quality settings is m, determine the quantity of rigidity resiliency supported 13 and adjustable rigidity resiliency supported 14 is all set to n, coupling determines the rigidity of rigidity resiliency supported 13 and adjustable rigidity resiliency supported 14 in accordance with the following methods:
Determine the rigidity k of single spring 131 in rigidity resiliency supported 13
sbe no more than k
1=4 π
2mf
1 2/ n, and the rigidity k of single spring 131
smeet 0.6k
1≤ k
s≤ 0.8k
1; The minimum rigidity k of single spring beam 141 in adjustable rigidity resiliency supported 14
b1meet k
b1=k
1-k
s, the highest rigidity k
b2meet k
b2=k
2-k
s=4 π
2mf
2 2/ n-k
s, be also the maximum effective length L of single spring beam 141 in adjustable rigidity resiliency supported 14
maxmeet
minimum effective length L
minmeet
wherein E and I is distributed as young's modulus of elasticity and the second moment of area of spring beam 141.
Preferably, described guiding mechanism 12 and/or the quantity of determining rigidity resiliency supported 13 are multiple, and the downward compressible stroke of single spring 131 is no less than 15mm.
Preferably, the quantity of described adjustable rigidity resiliency supported 14 is multiple and these adjustable rigidity resiliency supported 14 circumferences are evenly arranged.
Preferably, the quantity of adjustable rigidity resiliency supported 14 be four and these adjustable rigidity resiliency supported 14 in arranged in squares.
Preferably, described damping unit 15 is piston type damping unit, viscoelastic material damping unit, magnetorheological damping unit or electromagnetic type damping unit, and the total damping ratio of damping unit 15 is to be not less than 0.05, not higher than 0.15.
In the present embodiment, determine rigidity resiliency supported 13 and adjustable rigidity resiliency supported 14 is connected between parenchyma gauge block 11 and base 16 according to the mode of parallel connection, the spring 131 now determining rigidity resiliency supported 13 is not pressed on the upper surface of spring beam 141, separation therebetween.
Guiding mechanism 12, determine rigidity resiliency supported 13, adjustable rigidity resiliency supported 14 be respectively preferably four groups; The number of damping unit 15 is chosen as one, is arranged in the center of tuned mass damper, and the damping unit upper junction plate 113 on its upper end and parenchyma gauge block 11 is hinged, and the damping unit lower connecting plate 163 on its lower end and base 16 is hinged.Guide rod 121 in guiding mechanism 12 is fixedly connected on the pedestal 161 in base 16, and slide block 122 is fixedly connected on the slide attachment plate 112 in parenchyma gauge block 11.Because of total support stiffness that four groups of rigidity summations of determining rigidity resiliency supported 13 and adjustable rigidity resiliency supported 14 are tuned mass damper, therefore the concrete structure determining rigidity resiliency supported 13 selects the spring 131 that rigidity is relatively little, in the concrete structure of adjustable rigidity resiliency supported 14, select the spring beam 141 that rigidity is relatively little.For conserve space and mounting or dismounting are convenient, it is inner that each group guiding mechanism 12 is all placed in the spring 131 determining rigidity resiliency supported 13.One end of spring beam 141 in adjustable rigidity resiliency supported 14 is fixedly connected on base 16, and the other end also longitudinally can be free to slide relative to sliding part 142 through sliding part 142.Sliding part 142 can along being free to slide with the parallel longitudinal direction of spring beam 141 in the chute in parenchyma gauge block 11, and sliding part 142 is fixed on parenchyma gauge block 11 by locking nut 143.Spring beam Connection Block 162 in base 16, damping unit lower connecting plate 163 are all fixedly connected on pedestal 161.
In the present embodiment, the method of regulating system resonant frequency is as follows: if will reduce the resonant frequency of system, then unclamp locking nut 143, mobile sliding part 142 makes its one end be fixedly connected with base 16 away from spring beam 141, tighten locking nut 143 again, then the actual support rigidity of adjustable rigidity resiliency supported 14 reduces, and system resonance frequencies reduces; If improve the resonant frequency of system, then only sliding part 142 need be moved suitable distance to the one end be fixedly connected with base 16 near spring beam 141.In order to reach good frequency modulation effect, each adjustable rigidity resiliency supported 14 is carried out regulating according to identical method and amplitude.
Embodiment two
With reference to Fig. 3, Fig. 4, a kind of frequency can continually varying tuned mass damper, comprise parenchyma gauge block 21, guiding mechanism 22, determine rigidity resiliency supported 23, damping unit 25 and base 26, described parenchyma gauge block 21 and base 26 form main supporting structure jointly, described guiding mechanism 22, determine rigidity resiliency supported 23, damping unit 25 is arranged on described main supporting structure respectively, damping unit 25 and guiding mechanism 22 are arranged between parenchyma gauge block 21 and base 26 respectively, the former plays absorbing vibrational energy, and the latter plays restriction parenchyma gauge block 21 direction of motion.In addition, also comprise the adjustable rigidity resiliency supported 24 between described parenchyma gauge block 21 and described base 26, described adjustable rigidity resiliency supported 24 comprises spring beam 241, sliding part 242 and securing member, wherein, the right-hand member of described spring beam 241 is fixedly mounted on described base 26, and its left end passes described sliding part 242 and its upper surface and/or lower surface can contact with described sliding part 242 when tuned mass damper vibrates.Therefore, when initially not vibrating, namely before tuned mass damper vibration, the upper surface of spring beam 241 can contact with elastic component 242 all the time with lower surface, or spring beam 241 also can be only have upper surface to contact all the time before vibration, and lower surface and sliding part 242 keep as far as possible little gap, be advisable to be no more than 0.1mm, or spring beam 241 can also be only have lower surface to contact to contact all the time before vibration, and upper surface and sliding part 242 keep as far as possible little gap, being advisable to be no more than 0.1mm; Or spring beam 241 also can be upper surface and lower surface all keep as far as possible little gap with sliding part 242 before vibration, be advisable to be no more than 0.1mm, anyway finally will ensure that upper surface and/or lower surface want to contact with sliding part 242 when tuned mass damper vibrates.Described sliding part 242 position is arranged on adjustably also can along the longitudinal sliding motion of described spring beam 241 on described main supporting structure, and sliding part 242 is fixed on described main supporting structure by described securing member after sliding into desired location at described sliding part 242.Preferably, described base 26 comprises pedestal 261, spring beam Connection Block 262 and damping unit lower connecting plate 263, and described spring beam Connection Block 262 is arranged on described pedestal 261, and described damping unit lower connecting plate 263 is for connecting the lower end of damping unit 25.
Determine rigidity resiliency supported 23 and the adjustable rigidity resiliency supported 24 of the present embodiment are fixedly connected between parenchyma gauge block 21 and base 26 in the mode of series connection, and the spring 231 now determining rigidity resiliency supported 23 is pressed on the upper surface of spring beam 241.Determine rigidity resiliency supported 23 play balance parenchyma gauge block 21 gravity and a part of support stiffness is provided.As shown in the figure, the right-hand member of sliding part 242 to the distance of the left end of spring beam Connection Block 262 is effective lengths of adjustable rigidity resiliency supported 24, and remember that its value is L, then the vertical actual effective rigidity of adjustable rigidity resiliency supported 24 is k
b=3EI/L
3.The position of mobile sliding part 242 means the effective length L changing adjustable rigidity resiliency supported 24, also the support stiffness of spring beam 241 actual contribution is namely changed, thus can the resonant frequency of regulating system on a large scale continuously, make it accurately consistent with the structural vibration frequency of institute installation site, thus reach best shock attenuation result.
Preferably, described guiding mechanism 22 comprises slide block 222 and guide rod 221, described slide block 222 is fixedly mounted on described parenchyma gauge block 21, described guide rod 221 vertically arranges and its lower end is fixedly mounted on described base 26, described slide block 222 along the longitudinal sliding motion of described guide rod 221, vertically can move to make described parenchyma gauge block 21.Preferably, parenchyma gauge block 21 comprises mass main body 211, slide attachment plate 212 and damping unit upper junction plate 213, described slide attachment plate 212 and damping unit upper junction plate 213 are all fixedly mounted on described slide attachment plate 212, described slide block 222 is fixedly mounted on described slide attachment plate 212, and described damping unit upper junction plate 213 is for connecting the upper end of described damping unit 25.
Preferably, describedly determine rigidity resiliency supported 23 and comprise spring 231, described spring 231 is installed on described guiding mechanism 22, and its upper end is resisted against on described parenchyma gauge block 21, and its lower end abutment is on described base 26;
Described base 26 is provided with chute, described chute is inverted T-shaped, it comprises the first larger chute of width and less the second chute of width, correspondingly, described sliding part 242 entirety is in inverted T-shaped, and it comprises first sliding part that can slide in the first chute and second sliding part that can slide in the second chute; Described securing member is locking nut 243, and it is threaded on described second sliding part and also described sliding part 242 can be locked on described parenchyma gauge block 21.
In addition, also can adopt the mode that guide rail coordinates with sliding part, and securing member also can adopt wing bolt, and sliding part arranges chute, then wing bolt is connected on parenchyma gauge block through after chute, utilizes wing nut to lock sliding part after sliding part also can be made to move to correct position.
Preferably, lowest vibration set of frequency during described tuned mass damper work is f
1, maximum frequency of oscillation is set to f
2, parenchyma gauge block 21 quality settings is m, determine the quantity of rigidity resiliency supported 23 and adjustable rigidity resiliency supported 24 is all set to n, coupling determines the rigidity of rigidity resiliency supported 23 and adjustable rigidity resiliency supported 24 in accordance with the following methods:
Determine the rigidity k of single spring 231 in rigidity resiliency supported 23
sbe not less than k
2=4 π
2mf
2 2/ n, and the rigidity k of single spring 231
smeet 1.5k
2≤ k
s≤ 2k
2; The highest rigidity k of single spring beam 241 in adjustable rigidity resiliency supported 24
b2meet k
b2=1/ (1/k
2-1/k
s), the minimum rigidity k of single spring beam 241 in adjustable rigidity resiliency supported 24
b1meet k
b1=1/ (1/k
1-1/k
s), be also the maximum effective length L of single spring beam 241 in adjustable rigidity resiliency supported 24
maxmeet
minimum effective length L
minmeet
wherein E and I is distributed as young's modulus of elasticity and the second moment of area of spring beam 241.
Preferably, described guiding mechanism 22 and/or the quantity of determining rigidity resiliency supported 23 are multiple, and the downward compressible stroke of single spring 231 is no less than 15mm.
Preferably, the quantity of described adjustable rigidity resiliency supported 24 is multiple and these adjustable rigidity resiliency supported 24 circumferences are evenly arranged.
Preferably, the quantity of adjustable rigidity resiliency supported 24 be four and these adjustable rigidity resiliency supported 24 in arranged in squares.
Preferably, described damping unit 25 is piston type damping unit 25, viscoelastic material damping unit 25, magnetorheological damping unit 25 or electromagnetic type damping unit 25, and the total damping ratio of damping unit 25 is to be not less than 0.05, not higher than 0.15.
In the present embodiment, determine rigidity resiliency supported 23 and adjustable rigidity resiliency supported 24 to be connected between parenchyma gauge block 21 and base 26 according to the mode of series connection.Guiding mechanism 22, determine each four groups of rigidity resiliency supported 23, adjustable rigidity resiliency supported 24, and along the circumferential direction symmetrical uniform; The number of damping unit 25 is one, is arranged in the center of tuned mass damper, and the damping unit upper junction plate 213 in its upper end and parenchyma gauge block 21 is hinged, and the damping unit lower connecting plate 163 in its lower end and base 26 is hinged.Guide rod 221 in guiding mechanism 22 is fixedly connected on the pedestal 261 in base 26, and slide block 222 is fixedly connected on the slide attachment plate 212 in parenchyma gauge block 21.The spring 231 that the concrete structure determining rigidity resiliency supported 23 selects rigidity relatively large, the spring beam 241 selecting rigidity relatively large in the concrete structure of adjustable rigidity resiliency supported 24.For conserve space and mounting or dismounting are convenient, it is inner that each group guiding mechanism 22 is all placed in the spring 231 determining rigidity resiliency supported 23.One end of spring beam 241 in adjustable rigidity resiliency supported 24 is fixedly connected with on base plate 26, and the other end also longitudinally can be free to slide relative to sliding part 242 through sliding part 242.Sliding part 242 can along being free to slide with the parallel longitudinal direction of spring beam 241 in the chute in base 26, and sliding part 242 is fixing on base plate 26 by locking nut 243.Spring beam Connection Block 262 in base 26, damping unit lower connecting plate 263 are all fixedly connected on pedestal 261.
In the present embodiment, the method of regulating system resonant frequency is as follows: if will reduce the resonant frequency of system, then unclamp locking nut 243, mobile sliding part 242 makes its one end be fixedly connected with base 26 near spring beam 241, tighten locking nut 243 again, then the actual support rigidity of adjustable rigidity resiliency supported 24 reduces, and system resonance frequencies reduces; If improve the resonant frequency of system, then only sliding part 242 need be moved suitable distance to the one end be fixedly connected with base 26 away from spring beam 241.In order to reach good frequency modulation effect, each adjustable rigidity resiliency supported 24 is carried out regulating according to identical method and amplitude.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a frequency can continually varying tuned mass damper, comprise parenchyma gauge block, guiding mechanism, determine rigidity resiliency supported, damping unit and base, described parenchyma gauge block and base form main supporting structure jointly, described guiding mechanism, determine rigidity resiliency supported, damping unit and be arranged on described main supporting structure respectively, it is characterized in that
Also comprise the adjustable rigidity resiliency supported between described parenchyma gauge block and described base, described adjustable rigidity resiliency supported comprises spring beam, sliding part and securing member, wherein, the right-hand member of described spring beam is fixedly mounted on described base, its left end passes described sliding part and its upper surface and/or lower surface can contact with described sliding part when tuned mass damper vibrates, described slide positions is arranged on adjustably also can along the longitudinal sliding motion of described spring beam on described main supporting structure, sliding part is fixed on described main supporting structure by described securing member after sliding into desired location at described sliding part.
2. a kind of frequency according to claim 1 can continually varying tuned mass damper, it is characterized in that, described guiding mechanism comprises slide block and guide rod, described slide block is fixedly mounted on described parenchyma gauge block, described guide rod is vertically arranged and its lower end is fixedly mounted on described base, described slide block along the longitudinal sliding motion of described guide rod, vertically can move to make described parenchyma gauge block.
3. a kind of frequency according to claim 2 can continually varying tuned mass damper, it is characterized in that, describedly determine rigidity resiliency supported and comprise spring, described spring is installed on described guiding mechanism, its upper end is resisted against on described parenchyma gauge block, and its lower end abutment is on described base;
Described parenchyma gauge block is provided with chute, described chute is T-shaped, it comprises the first larger chute of width and less the second chute of width, correspondingly, described sliding part entirety is T-shaped, and it comprises first sliding part that can slide in the first chute and second sliding part that can slide in the second chute; Described securing member is locking nut, and it is threaded on described second sliding part and also described sliding part can be locked on described parenchyma gauge block.
4. a kind of frequency according to claim 3 can continually varying tuned mass damper, it is characterized in that, lowest vibration set of frequency during described tuned mass damper work is f
1, maximum frequency of oscillation is set to f
2, parenchyma gauge block quality settings is m, determine the quantity of rigidity resiliency supported and adjustable rigidity resiliency supported is all set to n, coupling determines the rigidity of rigidity resiliency supported and adjustable rigidity resiliency supported in accordance with the following methods:
Determine the rigidity k of single spring in rigidity resiliency supported
sbe no more than
and the rigidity k of single spring
smeet 0.6k
1≤ k
s≤ 0.8k
1; The minimum rigidity k of single spring beam in adjustable rigidity resiliency supported
b1meet k
b1=k
1-k
s, the highest rigidity k
b2meet
also be the maximum effective length L of single spring beam in adjustable rigidity resiliency supported
maxmeet
minimum effective length L
minmeet
wherein E and I is distributed as young's modulus of elasticity and the second moment of area of spring beam.
5. a kind of frequency according to claim 2 can continually varying tuned mass damper, it is characterized in that, describedly determine rigidity resiliency supported and comprise spring, described spring is installed on described guiding mechanism, its upper end is resisted against on described parenchyma gauge block, and its lower end abutment is on the upper surface of described crossbeam left end;
Described base is provided with chute, described chute is inverted T-shaped, it comprises the first larger chute of width and less the second chute of width, correspondingly, described sliding part entirety is in inverted T-shaped, and it comprises first sliding part that can slide in the first chute and second sliding part that can slide in the second chute; Described securing member is locking nut, and it is threaded on described second sliding part and also described sliding part can be locked on described parenchyma gauge block.
6. a kind of frequency according to claim 5 can continually varying tuned mass damper, it is characterized in that, lowest vibration set of frequency during described tuned mass damper work is f
1, maximum frequency of oscillation is set to f
2, parenchyma gauge block quality settings is m, determine the quantity of rigidity resiliency supported and adjustable rigidity resiliency supported is all set to n, coupling determines the rigidity of rigidity resiliency supported and adjustable rigidity resiliency supported in accordance with the following methods:
Determine the rigidity k of single spring in rigidity resiliency supported
sbe not less than
and the rigidity k of single spring
smeet 1.5k
2≤ k
s≤ 2k
2; The highest rigidity k of single spring beam in adjustable rigidity resiliency supported
b2meet k
b2=1/ (1/k
2-1/k
s), the minimum rigidity k of single spring beam in adjustable rigidity resiliency supported
b1meet k
b1=1/ (1/k
1-1/k
s), be also the maximum effective length L of single spring beam in adjustable rigidity resiliency supported
maxmeet
minimum effective length L
minmeet
wherein E and I is distributed as young's modulus of elasticity and the second moment of area of spring beam.
7. a kind of frequency according to claim 2 can continually varying tuned mass damper, it is characterized in that, the downward compressible stroke of described spring is no less than 15mm.
8. a kind of frequency according to claim 1 can continually varying tuned mass damper, and it is characterized in that, the quantity of described adjustable rigidity resiliency supported is multiple and these adjustable rigidity resiliency supported circumferences are evenly arranged.
9. a kind of frequency according to claim 1 can continually varying tuned mass damper, and it is characterized in that, the quantity of adjustable rigidity resiliency supported is four and these adjustable rigidity resiliency supported are arranged in squares.
10. a kind of frequency according to claim 1 can continually varying tuned mass damper, it is characterized in that, described damping unit is piston type damping unit, viscoelastic material damping unit, magnetorheological damping unit or electromagnetic type damping unit, and the total damping ratio of damping unit is to be not less than 0.05, not higher than 0.15.
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| CN105471124A (en) * | 2015-12-18 | 2016-04-06 | 北京金风科创风电设备有限公司 | Vibration-absorbing apparatus for motor stator, motor stator and motor |
| CN106013492A (en) * | 2016-06-28 | 2016-10-12 | 南京工业大学 | Building quakeproof system and induction control method thereof |
| CN106193794A (en) * | 2016-07-27 | 2016-12-07 | 温州大学瓯江学院 | A kind of antidetonation faced wall with Multiple Protective Structure |
| CN106988592A (en) * | 2017-04-06 | 2017-07-28 | 东南大学 | A kind of swing-type tuned mass damper device |
| CN108861981A (en) * | 2018-09-13 | 2018-11-23 | 杭州西奥电梯有限公司 | A kind of vibration damping lift car |
| US10495176B2 (en) | 2017-11-10 | 2019-12-03 | Industrial Technology Research Institute | Adjustable damper and method for controlling the same |
| CN114876995A (en) * | 2022-02-08 | 2022-08-09 | 上海交通大学 | Multidimensional self-adaptive vibration and noise control device |
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| CN105471124A (en) * | 2015-12-18 | 2016-04-06 | 北京金风科创风电设备有限公司 | Vibration-absorbing apparatus for motor stator, motor stator and motor |
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| CN106988592A (en) * | 2017-04-06 | 2017-07-28 | 东南大学 | A kind of swing-type tuned mass damper device |
| CN106988592B (en) * | 2017-04-06 | 2019-02-01 | 东南大学 | A kind of swing-type tuned mass damper device |
| US10495176B2 (en) | 2017-11-10 | 2019-12-03 | Industrial Technology Research Institute | Adjustable damper and method for controlling the same |
| CN108861981A (en) * | 2018-09-13 | 2018-11-23 | 杭州西奥电梯有限公司 | A kind of vibration damping lift car |
| CN114876995A (en) * | 2022-02-08 | 2022-08-09 | 上海交通大学 | Multidimensional self-adaptive vibration and noise control device |
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