CN110539842B

CN110539842B - Non-linear elastic vibration reduction bed plate

Info

Publication number: CN110539842B
Application number: CN201910885468.6A
Authority: CN
Inventors: 张峰; 沈琪; 胡东森; 高岩; 刘进; 丁灿龙
Original assignee: 702th Research Institute of CSIC
Current assignee: 702th Research Institute of CSIC
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-11-10
Anticipated expiration: 2039-09-19
Also published as: CN110539842A

Abstract

The invention relates to a nonlinear elastic vibration reduction floor plate which comprises a bottom plate, wherein T-shaped steel which is arranged at intervals in a longitudinal and transverse mode is welded on the upper surface of the bottom plate, the upper surfaces of all the T-shaped steel are located on the same plane, a plurality of supporting spring piece assemblies are uniformly distributed on the upper surface of the T-shaped steel at intervals, and a panel is installed on the upper portions of the supporting spring piece assemblies through fasteners. Adopt the form of double-deck plate structure, wherein install T shape steel on the bottom plate, as the dull and stereotyped that adds the muscle, the panel is the individual layer flat board, and the centre is connected and is supported with nonlinear euler spring leaf, for the bearing capacity of guaranteeing the bed board structure, the panel can adopt modes such as bodiness or add the muscle to strengthen the processing to improve its bearing capacity, reduce the panel compressive deformation.

Description

Non-linear elastic vibration reduction bed plate

Technical Field

The invention relates to the technical field of vibration reduction equipment, in particular to a nonlinear elastic vibration reduction floor plate.

Background

In order to efficiently utilize the limited internal space, most cabins of conventional submarines are arranged with 1-2 layers of planking (platform), and nuclear submarines are arranged with 3-4 layers of planking (platform). In addition to the function of separating the functional areas, decking also provides a mounting and support platform for a wide variety of equipment and piping. The planking that uses always among the engineering reality is mostly dull and stereotyped reinforced structure, and both sides and casing adopt the rigid connection mode of direct welding, and the horizontal strengthening rib under the planking also passes through bracket and withstand voltage hull rigid connection. The planking is excited by vibration of the upper layer equipment to generate bending waves and longitudinal waves, then reflection and transmission are formed by the supporting brackets or planking panels and the welding edges of the hull, the transmitted bending waves and longitudinal waves are transmitted along the circumferential direction of the pressure shell, and acoustic wave radiation is formed in water. In the whole process, the plank vibrates greatly, the energy loss is small, the vibration transmission path is short, and the transmission of the noise of the blocking structure to the boat body is not facilitated. The prior floor structure design only considers the requirements of static deformation under the action of deepwater pressure and impact resistance for protecting normal operation of equipment, and the requirements on acoustics are less considered.

The sandwich structure flat plate is a typical structure which is widely applied in practical engineering, and when the sandwich structure flat plate is applied to the field of ship vibration reduction and noise reduction, the vibration performance of a deck structure can be improved, the structural design of the deck is enriched, the requirements of vibration reduction and structural strength are met, the two are coordinated and unified, and the sandwich structure flat plate is an effective way for reducing vibration sound radiation of the deck and a shell. With the application of new materials and new structures in engineering in recent years, the structural design of the floor board also shows diversified development trends, and the structural forms can be greatly changed, such as a honeycomb sandwich board, a V-shaped corrugated sandwich board, a triangular sandwich board, a corrugated sandwich board, a grid sandwich board and a hollow square tube board. The sandwich material also can be selected from ester foam, foamed aluminum alloy, glass fiber reinforced plastic sandwich, polyurethane sandwich, light metal sandwich and the like. The horizontal plank design of the train and the plane also adopts multilayer composite boards and other structures, and has the characteristics of light weight, high specific strength, good rigidity, buffering and vibration absorption and the like.

Disclosure of Invention

The applicant provides a nonlinear elastic vibration reduction floor plate aiming at the defects in the prior art, so that a vibration reduction and isolation spring piece is integrated into the structural design of a double-layer sandwich floor plate to form a novel elastic vibration reduction floor plate design scheme, the vibration reduction and isolation effect of a floor plate structure in a boat is exerted, and the vibration transmission of the floor plate is reduced.

The technical scheme adopted by the invention is as follows:

the utility model provides a non-linear elasticity damping bed board, includes the bottom plate, the last skin weld of bottom plate has the interval T shaped steel of arranging with great ease, and the upper surface of all T shaped steel is located the coplanar position, the even interval distribution of upper surface of T shaped steel has a plurality of support spring leaf subassemblies, the upper portion of supporting spring leaf subassembly passes through fastener installation panel.

The further technical scheme is as follows:

the structure of a single supporting spring piece assembly is as follows: the disc type spring plate fixing device is characterized by comprising a disc, wherein the lower bottom surface of the disc is a plane, the upper surface of the disc is a conical surface, a plurality of spring plates are uniformly installed at intervals in the circumferential direction of the conical surface, a triangular block is installed at the head of each spring plate through a fastener, the top surface of each triangular block is located at the same plane, and a large threaded hole connected with a panel is formed in each triangular block.

The conical surface of the disc is attached to the arc surface at one end of the elastic sheet.

The elastic pieces are arranged on the disc in four circumferential corners.

The section of a single elastic sheet is arc-shaped, the width of the elastic sheet increases progressively from one end to the other end, one end of the elastic sheet is provided with a locking hole connected with the disc, and the other end of the elastic sheet is provided with a small threaded hole connected with the triangular block.

Three small threaded holes are arranged at intervals.

The invention has the following beneficial effects:

the invention has compact and reasonable structure and convenient operation, adopts a double-layer plate structure form, wherein the bottom plate is provided with T-shaped steel as a reinforced flat plate, the panel is a single-layer flat plate, the middle part is connected and supported by the nonlinear Euler spring piece, and in order to ensure the bearing performance of the paving plate structure, the panel can be reinforced by thickening or reinforcing and the like so as to improve the bearing capacity and reduce the compression deformation of the panel.

The damping performance of the invention is realized by an elastic energy storage system consisting of the supporting spring piece assembly, the panel and the bottom plate, and the thickness, the length and the width of the elastic piece can be designed according to the requirements of the static load bearing characteristic and the vibration isolation effect. The spring plate is made of silicon-manganese alloy steel, and has good deformation memory and recovery functions.

The invention firstly integrates the vibration reduction and isolation spring steel sheet into the structural design of the floor plate, so that the spring steel sheet has the vibration reduction and isolation effect, and the current situations of large vibration transmission and small energy loss of the existing floor plate can be obviously improved.

The invention successfully applies the characteristics of high static stiffness and low dynamic stiffness of the nonlinear spring steel sheet to the design of the vibration reduction floor, and can improve the low-frequency vibration isolation performance of the floor under the condition of ensuring the original unchanged bearing.

The invention has simple structure and long service life, is not influenced by the surrounding environment, can replace any component and is convenient for future maintenance.

The invention can be used for controlling the vibration of ships, vehicles, airplanes and other equipment.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

FIG. 3 is a schematic view of the assembly of the base plate and the support spring assembly of the present invention.

FIG. 4 is a schematic view of the support spring assembly of the present invention.

FIG. 5 is a structural schematic view of another perspective of the support spring assembly of the present invention.

Wherein: 1. a panel; 2. supporting a spring leaf assembly; 3. t-shaped steel; 4. a base plate;

201. a triangular block; 202. a large threaded hole; 203. a spring plate; 204. a disc; 205. a small threaded hole.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, 2 and 3, the nonlinear elastic vibration reduction deck of the present embodiment includes a bottom plate 4, T-shaped steels 3 are welded on the upper surface of the bottom plate 4 and are arranged vertically and horizontally at intervals, the upper surfaces of all the T-shaped steels 3 are located at the same plane position, a plurality of supporting spring assemblies 2 are uniformly distributed on the upper surface of the T-shaped steel 3 at intervals, and the upper portions of the supporting spring assemblies 2 are mounted on a panel 1 through fasteners.

As shown in fig. 4 and 5, the structure of the single support spring assembly 2 is: including disc 204, the lower bottom surface of disc 204 is the plane, and the upper surface is the conical surface, and a plurality of shell fragments 203 are installed to the even interval of circumferencial direction of conical surface, and triangle piece 201 is installed through the fastener to the head of every shell fragment 203, and the top surface of every triangle piece 201 is located coplanar position, and it has the big screw hole 202 of being connected with panel 1 to open on the triangle piece 201.

The conical surface of the disc 204 is attached to the arc surface at one end of the spring plate 203.

The elastic pieces 203 are arranged on the disc 204 at four circumferential corners.

The section of the single elastic sheet 203 is in an arc shape, the width of the elastic sheet 203 increases from one end to the other end, one end of the elastic sheet 203 is provided with a locking hole connected with the disc 204, and the other end of the elastic sheet 203 is provided with a small threaded hole 205 connected with the triangular block 201.

Three small threaded holes 205 are arranged at intervals.

The lower bottom surface of the disc 204 is welded to the T-section steel 3.

Fig. 1, fig. 2 and fig. 3 show the structure of the nonlinear elastic damping deck assembly, which mainly comprises a panel 1, a supporting spring assembly 2, a T-shaped steel 3 and a bottom plate 4, wherein the bottom of the supporting spring assembly 2 is welded on the T-shaped steel 3, and the top is connected with the panel 1 through a bolt.

The elastic pieces 203 are divided into four groups, are fixedly arranged on the disc 204 and are separated along the circumferential direction according to a certain angle, so that the installation stability of the horizontal shearing direction of the plank is ensured.

The thickness, length and width of the spring plate 203 need to be designed by its load bearing and vibration isolation requirements.

In the actual installation process, firstly, the nonlinear spring steel sheet (namely the elastic sheet 203) is designed according to the bearing requirement, the static load deformation and the bending angle of the nonlinear spring steel sheet are calculated, and the number and the arrangement positions of the elastic sheets 203 are determined according to the bearing requirement of the floor. Secondly, a triangular block 201 is designed and processed, and the angle of the bevel edge of the triangular block is consistent with the bending angle of the elastic sheet 203 under static load. In order to improve the shearing rigidity of the floor, the elastic pieces 203 are arranged at four circumferential corners. Four spring pieces 203 are arranged on each disk 204 to form a support spring piece assembly 2, a plurality of groups of support spring piece assemblies 2 are arranged in the same mode, then the disks 204 are welded with the T-shaped steel 3 on the bottom plate 4, finally the triangular blocks 201 are connected and fixed with the panel 1, and fastening bolts are arranged on the panel 1. The installation is convenient and fast.

The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.

Claims

1. A non-linear elastic vibration damping deck is characterized in that: the steel plate comprises a bottom plate (4), T-shaped steels (3) which are arranged vertically and horizontally at intervals are welded on the upper surface of the bottom plate (4), the upper surfaces of all the T-shaped steels (3) are located on the same plane, a plurality of supporting spring piece assemblies (2) are uniformly distributed on the upper surface of each T-shaped steel (3) at intervals, and a panel (1) is installed on the upper parts of the supporting spring piece assemblies (2) through fasteners; the structure of the single supporting spring piece component (2) is as follows: the novel elastic plate comprises a disc (204), wherein the lower bottom surface of the disc (204) is a plane, the upper surface of the disc is a conical surface, a plurality of elastic sheets (203) are uniformly installed at intervals in the circumferential direction of the conical surface, a triangular block (201) is installed at the head of each elastic sheet (203) through a fastener, the top surface of each triangular block (201) is located at the same plane, and a large threaded hole (202) connected with a panel (1) is formed in each triangular block (201); the conical surface of the disc (204) is attached to the arc surface at one end of the elastic sheet (203); the elastic sheets (203) are arranged on the disc (204) at four circumferential corners; the section of a single elastic sheet (203) is arc-shaped, the width of the elastic sheet (203) increases progressively from one end to the other end, one end of the elastic sheet (203) is provided with a locking hole connected with a disc (204), and the other end is provided with a small threaded hole (205) connected with a triangular block (201); three small threaded holes (205) are arranged at intervals.