A vibration isolation method, system and electronic device
By constructing multiple hollow trench vibration isolation barriers under different soil stability conditions, the problem of unsatisfactory vibration isolation effect in soft soil areas was solved, achieving ideal vibration isolation effect in soft soil areas and reducing the impact of construction vibration on the environment.
Patent Information
- Application Number
- CN202211369135.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-03
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2042-11-03
AI Technical Summary
In areas with poor soil conditions, such as soft soil, it is difficult to excavate trenches to a reasonable depth, resulting in unsatisfactory vibration isolation effects and an inability to effectively reduce the impact of construction vibrations on nearby buildings and human life.
A vibration isolation barrier with multiple intermittently spaced trenches was constructed. Each trench had a soil-filled structure on both sides, and there was only one soil-filled structure between adjacent trenches. By determining the vibration frequency range and band gap range, the design parameters of the vibration isolation barrier were optimized to achieve a reasonable vibration isolation effect under different soil stability conditions.
Under different soil stability conditions, the ideal vibration isolation effect was achieved by constructing multiple hollow trench vibration isolation barriers, thus reducing the impact of construction vibration on the environment.
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Figure CN115577434B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of vibration isolation, in particular to a vibration isolation method, system and electronic equipment. BACKGROUND
[0002] In recent years, the scale of urbanization in China has rapidly developed, and railway and highway traffic lines crisscross through the country, with high-rise buildings rising from the ground. The behaviors of blasting, piling and dynamic compaction during the construction process cause environmental vibration pollution problems; the strong vibration during the construction process can exceed the allowable vibration range of instruments and buildings, causing a great negative impact on the nearby buildings and human living, and measures must be taken to alleviate the problem.
[0003] The propagation medium of environmental vibration is the ground, so setting a wave barrier (referring to an object with a certain size set in the wave propagation medium) on the ground can weaken the propagation of vibration waves. The empty trench is widely used in vibration isolation engineering due to its high vibration isolation efficiency, convenient construction and low cost. The vibration isolation effect of the empty trench mainly depends on the excavation depth, and research shows that a single empty trench can achieve ideal vibration isolation effect (75% vibration isolation rate) when the depth reaches 0.6 times the Rayleigh wavelength, however, in soft soil and other poor soil areas, the empty trench is difficult to be excavated to a reasonable depth due to the limitation of soil stability, and it is difficult to achieve ideal vibration isolation effect. SUMMARY
[0004] The purpose of the present application is to provide a vibration isolation method, system and electronic equipment, which can achieve reasonable vibration isolation effect in construction sites with different soil stability by constructing a vibration isolation barrier provided with multiple empty trenches.
[0005] To achieve the above purpose, the present application provides the following solutions:
[0006] A vibration isolation method, comprising:
[0007] obtaining a vibration frequency range of a vibration source;
[0008] constructing multiple to-be-constructed vibration isolation barriers; any of the vibration isolation barriers is provided with multiple empty trenches at intervals; both sides of any of the empty trenches are provided with a soil pile structure; and only one soil pile structure is provided between adjacent two empty trenches;
[0009] determining a band gap range of each to-be-constructed vibration isolation barrier according to the design parameters of the to-be-constructed vibration isolation barrier;
[0010] determining an optimal to-be-constructed vibration isolation barrier according to the vibration frequency range and the multiple band gap ranges;
[0011] setting a vibration isolation barrier around the vibration source according to the design parameters of the optimal to-be-constructed vibration isolation barrier.
[0012] Optionally, the design parameters include the number of the empty trenches, the shape of the empty trenches, the spacing width of the empty trenches, the cross-sectional shape of the earth-structure, and the size of the earth-structure.
[0013] Optionally, the cross-sectional shape of the empty trench is rectangular.
[0014] Optionally, the cross-sectional shape of the earth-structure is triangular or semicircular; the cross-sectional shapes of the earth-structures in the same vibration isolation barrier are the same.
[0015] Optionally, the determining the band gap range of each to-be-constructed vibration isolation barrier according to the design parameters of the to-be-constructed vibration isolation barrier comprises:
[0016] determining a displacement expression of a vibration wave of the vibration source when the vibration wave is a plane wave; the displacement expression is: u(r, t) = e iω t u(r); wherein, t is time; r is a position vector; i is an imaginary unit; ω is a circular frequency; u(r) is a displacement amplitude at the position vector r; u(r, t) represents a displacement vector at the position vector r at time t;
[0017] determining any to-be-constructed vibration isolation barrier as a current to-be-constructed vibration isolation barrier;
[0018] determining a periodic boundary condition of the current to-be-constructed vibration isolation barrier based on a periodic theory; the periodic boundary condition is: u(r + a) = u(r) e ik(r+a) ; wherein, a is a periodic constant; k is a wave vector;
[0019] constructing a cell eigen equation of the current to-be-constructed vibration isolation barrier according to the design parameters of the current to-be-constructed vibration isolation barrier; the cell eigen equation is: Ku(r) = Mωu(r); K is a stiffness matrix, and M is a mass matrix;
[0020] substituting the displacement expression and the periodic boundary condition of the current to-be-constructed vibration isolation barrier into the cell eigen equation to obtain a band gap range of the current to-be-constructed vibration isolation barrier.
[0021] Optionally, the determining the optimal to-be-constructed vibration isolation barrier according to the vibration frequency range and the plurality of band gap ranges comprises:
[0022] determining that a to-be-constructed vibration isolation barrier corresponding to a band gap range intersecting with the vibration frequency range is a to-be-determined vibration isolation barrier;
[0023] determining that a to-be-determined vibration isolation barrier corresponding to a band gap range with the maximum width is the optimal to-be-constructed vibration isolation barrier.
[0024] A vibration isolation system comprises:
[0025] The vibration frequency range acquisition module is configured to acquire a vibration frequency range of the vibration source.
[0026] The to-be-constructed vibration isolation barrier construction module is configured to construct a plurality of to-be-constructed vibration isolation barriers.
[0027] The band gap range determination module is configured to determine a band gap range of each to-be-constructed vibration isolation barrier according to a design parameter of the to-be-constructed vibration isolation barrier.
[0028] The optimal to-be-constructed vibration isolation barrier determination module is configured to determine an optimal to-be-constructed vibration isolation barrier according to the vibration frequency range and the plurality of band gap ranges.
[0029] The vibration isolation implementation module is configured to set a vibration isolation barrier around the vibration source according to a design parameter of the optimal to-be-constructed vibration isolation barrier.
[0030] The electronic device comprises a memory and a processor, the memory is configured to store a computer program, and the processor runs the computer program to make the electronic device execute the vibration isolation method.
[0031] Optionally, the memory is a readable storage medium.
[0032] According to the specific embodiments of the present application, the following technical effects are provided.
[0033] The present application provides a vibration isolation method, system and electronic device, which acquires a vibration frequency range of a vibration source, constructs a plurality of to-be-constructed vibration isolation barriers, and determines a band gap range of each to-be-constructed vibration isolation barrier according to a design parameter of the to-be-constructed vibration isolation barrier. BRIEF DESCRIPTION OF DRAWINGS
[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.
[0035] Figure 1A flow chart of a vibration isolation method in an embodiment of the present application;
[0036] Figure 2 A schematic diagram of a vibration isolation barrier structure in an embodiment of the present application;
[0037] Figure 3 A schematic diagram of an empty trench in an embodiment of the present application;
[0038] Figure 4 A schematic diagram of a first shape of a soil pile structure in an embodiment of the present application;
[0039] Figure 5 A schematic diagram of a second shape of a soil pile structure in an embodiment of the present application;
[0040] Figure 6 A schematic diagram of a barrier cell structure in an embodiment of the present application;
[0041] Explanation of reference signs:
[0042] 1 - soil pile structure; 2 - empty trench; 3 - foundation. DETAILED DESCRIPTION
[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0044] The purpose of the present application is to provide a vibration isolation method, system and electronic device, which can achieve reasonable vibration isolation effect in construction sites with different soil body stability by constructing a vibration isolation barrier provided with multiple empty trenches.
[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.
[0046] Embodiment 1
[0047] As shown in Figure 1 The present application provides a vibration isolation method, comprising:
[0048] Step 101: obtaining the vibration frequency range of the vibration source.
[0049] Step 102: constructing multiple to-be-constructed vibration isolation barriers; any vibration isolation barrier is provided with multiple empty trenches at intervals; both sides of any empty trench are provided with a soil pile structure; and only one soil pile structure is provided between two adjacent empty trenches.
[0050] Step 103: determining the band gap range of each to-be-constructed vibration isolation barrier according to the design parameters of the to-be-constructed vibration isolation barrier. The design parameters include the number of empty trenches, the shape of empty trenches, the spacing width of empty trenches, the cross-sectional shape of the earth structure, and the size of the earth structure. As shown in Figure 3 , the cross-sectional shape of the empty trench is rectangular. As shown in Figure 4 and Figure 5 , the cross-sectional shape of the earth structure is triangular or semicircular; the cross-sectional shapes of the plurality of earth structures in the same vibration isolation barrier are the same.
[0051] For example, step 103 includes:
[0052] Step 1031: determining the displacement expression when the vibration wave of the vibration source is a plane wave; the displacement expression is: u(r, t) = e iωt iωt u(r); where t is time; r is a position vector; i is an imaginary unit; ω is a circular frequency; u(r) is the displacement amplitude at the position vector r; u(r, t) represents the displacement vector at the position vector r at time t;
[0053] Step 1032: determining any to-be-constructed vibration isolation barrier as the current to-be-constructed vibration isolation barrier;
[0054] Step 1033: determining the periodic boundary condition of the current to-be-constructed vibration isolation barrier based on the periodic theory; the periodic boundary condition is: u(r + a) = u(r) e ik(r+a) ; where a is a periodic constant; k is a wave vector;
[0055] Step 1034: constructing the cell eigen equation of the current to-be-constructed vibration isolation barrier according to the design parameters of the current to-be-constructed vibration isolation barrier; the cell eigen equation is: Ku(r) = Mωu(r); K is a stiffness matrix, and M is a mass matrix;
[0056] Step 1035: substituting the displacement expression and the periodic boundary condition of the current to-be-constructed vibration isolation barrier into the cell eigen equation to obtain the band gap range of the current to-be-constructed vibration isolation barrier.
[0057] Reference design parameters of the vibration isolation barrier:
[0058] The reference value of the number of empty trenches is: n = 1, 2, 3.
[0059] The cross-sectional shape of the empty trench is rectangular, and the width is a constant value w = 0.1L R , L R is the Rayleigh wave wavelength, and the depth is d = 0.2L R , 0.3L R , 0.4L R or 0.5L R ;
[0060] The distance between the empty trenches: s = 0.1L R , 0.2L R or 0.3L R .
[0061] The cross-sectional shape of the earth structure: triangle or semicircle.
[0062] The size of the earth structure needs to be calculated according to the number of empty trenches, the distance between the empty trenches and the depth of the empty trenches:
[0063] When the earth structure is triangular, the bottom is taken as 0.8s; then the height is calculated according to ;
[0064] When the earth structure is semicircular, the radius r = 0.8s;
[0065] The periodic constant a = s (the distance between the empty trenches).
[0066] Based on the periodic theory, the following periodic boundary conditions can be established: Figure 6 ( Figure 6 where a is the periodic constant; H is the depth of the soil body, and the value is H = 20a.
[0067] u(r+a) = u k (r)e ik(r+a) (1)
[0068] Where: a is the periodic constant; k is the wave vector; u k (r) is the amplitude modulation function.
[0069] Assume that the vibration wave is a plane wave:
[0070] u(r,t) = e iωt u(r) (2)
[0071] The eigen equation of the vibration isolation barrier cell can be expressed as:
[0072] Ku(r) = Mωu(r) (3)
[0073] In the two-dimensional plane model, when the soil body is periodically loaded in a certain direction, it belongs to a one-dimensional periodic structure. Substitute equation (1) and equation (2) into equation (3) and solve, then according to the periodic structure theory, only the wave vector k in the range of [0, a / π] needs to be swept, and the dispersion relationship between the wave vector k and the circular frequency ω can be obtained.
[0074] Step 104: determining the optimal vibration isolation barrier to be constructed according to the vibration frequency range and the plurality of band gap ranges; for example, step 104 includes:
[0075] Step 1041: determining that the to-be-constructed vibration isolation barrier corresponding to the band gap range intersecting with the vibration frequency range is a to-be-determined vibration isolation barrier.
[0076] Step 1042: determining that the to-be-determined vibration isolation barrier corresponding to the band gap range with the maximum width is an optimal to-be-constructed vibration isolation barrier.
[0077] Step 105: setting the vibration isolation barrier around the vibration source according to the design parameters of the optimal to-be-constructed vibration isolation barrier, as shown in Figure 2
[0078] Embodiment 2
[0079] In order to perform the method corresponding to the above-mentioned embodiment one, to realize the corresponding function and technical effect, the following provides a vibration isolation system, comprising:
[0080] A vibration frequency range acquisition module is configured to acquire the vibration frequency range of the vibration source.
[0081] A to-be-constructed vibration isolation barrier construction module is configured to construct a plurality of to-be-constructed vibration isolation barriers; any vibration isolation barrier is provided with a plurality of trenches at intervals; both sides of any trench are provided with an earth structure; and only one earth structure is provided between adjacent two trenches.
[0082] A band gap range determination module is configured to determine the band gap range of each to-be-constructed vibration isolation barrier according to the design parameters of the to-be-constructed vibration isolation barrier.
[0083] An optimal to-be-constructed vibration isolation barrier determination module is configured to determine the optimal to-be-constructed vibration isolation barrier according to the vibration frequency range and the plurality of band gap ranges.
[0084] A vibration isolation implementation module is configured to set the vibration isolation barrier around the vibration source according to the design parameters of the optimal to-be-constructed vibration isolation barrier.
[0085] Embodiment 3
[0086] The embodiment provides an electronic device, comprising a memory and a processor, the memory is used for storing a computer program, and the processor runs the computer program to make the electronic device execute the vibration isolation method of the embodiment 1. The memory is a readable storage medium.
[0087] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the related parts can be referred to the method part.
[0088] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the present specification should not be understood as the limitation of the present application.
Claims
1. A vibration isolation method, characterized in that, include: Obtain the vibration frequency range of the vibration source; Multiple vibration isolation barriers are constructed; each vibration isolation barrier is provided with multiple open trenches at intervals; soil mounds are provided on both sides of each open trench; and only one soil mound is provided between two adjacent open trenches. Based on the design parameters of the vibration isolation barriers to be constructed, determine the band gap range of each vibration isolation barrier to be constructed; Based on the vibration frequency range and multiple bandgap ranges, the optimal vibration isolation barrier to be constructed is determined; According to the optimal design parameters of the vibration isolation barrier to be constructed, a vibration isolation barrier is set around the vibration source; The step of determining the bandgap range of each vibration isolation barrier to be constructed based on the design parameters of the barriers to be constructed includes: Determine the displacement expression when the vibration wave of the vibration source is a plane wave; the displacement expression is: u(r,t)=e iωt u(r); where t is time; r is the position vector; i is the imaginary unit; ω is the angular frequency; u(r) is the displacement amplitude at position vector r; u(r,t) represents the displacement vector at position vector r at time t; Select any vibration isolation barrier to be constructed as the current vibration isolation barrier to be constructed; Based on periodicity theory, the periodic boundary conditions for the vibration isolation barrier to be constructed are determined; the periodic boundary conditions are: u(r+a)=u(r)e ik(r+a) Where a is the periodic constant and k is the wave vector; Based on the design parameters of the vibration isolation barrier to be constructed, the cellular eigenvalue equation of the vibration isolation barrier to be constructed is constructed; the cellular eigenvalue equation is: Ku(r)=Mωu(r); K is the stiffness matrix and M is the mass matrix; Substituting the displacement expression and the periodic boundary conditions of the current vibration isolation barrier into the cell eigenvalue equation, the bandgap range of the current vibration isolation barrier is obtained. The step of determining the optimal vibration isolation barrier to be constructed based on the vibration frequency range and multiple bandgap ranges includes: The bandgap range that intersects with the vibration frequency range is identified as the vibration isolation barrier to be constructed. The optimal vibration isolation barrier to be constructed is the one corresponding to the band gap with the largest width.
2. The vibration isolation method according to claim 1, characterized in that, The design parameters include the number of trenches, the shape of the trenches, the width of the trench intervals, the cross-sectional shape of the soil mound structure, and the dimensions of the soil mound structure.
3. The vibration isolation method according to claim 2, characterized in that, The cross-sectional shape of the groove is rectangular.
4. The vibration isolation method according to claim 2, characterized in that, The cross-sectional shape of the soil-filled structure is triangular or semi-circular; multiple soil-filled structures in the same vibration isolation barrier have the same cross-sectional shape.
5. A vibration isolation system, characterized in that, include: The vibration frequency range acquisition module is used to acquire the vibration frequency range of the vibration source. The vibration isolation barrier construction module is used to construct multiple vibration isolation barriers; each vibration isolation barrier is provided with multiple empty trenches at intervals; each empty trench is provided with soil piling structures on both sides; and only one soil piling structure is provided between two adjacent empty trenches. The bandgap range determination module is used to determine the bandgap range of each vibration isolation barrier to be constructed based on the design parameters of the barrier. The process of determining the bandgap range of each vibration isolation barrier based on its design parameters includes: determining the displacement expression when the vibration source's vibration wave is a plane wave; the displacement expression is: u(r,t)=e iωt u(r); where t is time; r is the position vector; i is the imaginary unit; ω is the angular frequency; u(r) is the displacement amplitude at position vector r; u(r,t) represents the displacement vector at position vector r at time t; any vibration isolation barrier to be constructed is determined as the current vibration isolation barrier to be constructed; based on periodic theory, the periodic boundary conditions of the current vibration isolation barrier to be constructed are determined; the periodic boundary conditions are: u(r+a)=u(r)e ik(r+a) Where a is the periodic constant; k is the wave vector; based on the design parameters of the current vibration isolation barrier to be constructed, the cellular eigenvalue equation of the current vibration isolation barrier to be constructed is constructed; the cellular eigenvalue equation is: Ku(r)=Mωu(r); K is the stiffness matrix, M is the mass matrix; substituting the displacement expression and the periodic boundary conditions of the current vibration isolation barrier to be constructed into the cellular eigenvalue equation, the band gap range of the current vibration isolation barrier to be constructed is obtained; The optimal vibration isolation barrier determination module is used to determine the optimal vibration isolation barrier to be constructed based on the vibration frequency range and multiple band gap ranges. The determination of the optimal vibration isolation barrier based on the vibration frequency range and multiple band gap ranges includes: determining the vibration isolation barrier to be constructed corresponding to the band gap range that intersects with the vibration frequency range as the undetermined vibration isolation barrier; and determining the undetermined vibration isolation barrier corresponding to the band gap range with the largest width as the optimal vibration isolation barrier to be constructed. The vibration isolation implementation module is used to set up a vibration isolation barrier around the vibration source according to the optimal design parameters of the vibration isolation barrier to be constructed.
6. An electronic device, characterized in that, The device includes a memory and a processor, the memory being used to store a computer program, and the processor running the computer program to cause the electronic device to perform a vibration isolation method according to any one of claims 1 to 4.
7. An electronic device according to claim 6, characterized in that, The memory is a readable storage medium.
Citation Information
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