Method and system for determining parameters of vibration isolation device for fertilizer tank in building

Abstract

The present disclosure relates to a parameter determination method and device for a vibration isolation device for a building fertilizer trough. The method comprises: collecting a vibration acceleration signal at each target detection point through an acceleration sensor placed at multiple target detection points; determining the peak frequency with the largest amplitude in the vibration response distribution based on the vibration acceleration signal at each target detection point; determining the value range of the stiffness of the biconical rubber layer in the vibration isolation device for the building fertilizer trough based on the peak frequency with the largest amplitude in the vibration response distribution, as well as the first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer, wherein the stiffness of the biconical rubber layer includes axial stiffness and shear stiffness; determining the rubber material and dimensional parameters of the biconical rubber layer based on the value range of the stiffness of the biconical rubber layer, wherein the dimensional parameters include: cone height, bottom diameter, top diameter, and taper. Through this technical solution, the adjustability of the stiffness of the vibration isolation layer is achieved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of civil engineering structure vibration control, and in particular to a method and device for determining parameters of a vibration isolation device for a fertilizer tank in a building. Background Art

[0002] Urban rail transit is a general term for various types of railway systems providing passenger transportation within urban core areas or suburban areas, including trams, light rail, and subways. Compared to other modes of transportation, such as cars, buses, and bicycles, urban rail transit offers irreplaceable advantages, including speed, convenience, large passenger capacity, low cost, punctuality, and clean energy. Urban rail transit has gradually become the primary mode of transportation for residents of large and medium-sized cities in China, and the accelerated pace of urbanization is bound to lead to a surge in the development of public rail transit services.

[0003] While urban rail transit offers significant convenience to residents, it also creates a series of environmental vibration and noise issues. These issues primarily arise in two ways: First, the rolling of train wheels excites vibrations in station structures, tunnels, and the rock and soil along the track, which propagate to nearby building foundations or basement walls, causing internal structural vibrations and secondary radiated noise. Second, noise from trains travels through the air, causing noise pollution along the track. These issues significantly impact residents' daily lives and work, causing varying degrees of physical and psychological burden and discomfort. Major cities are poised to significantly increase their urban rail transit development efforts in the future. First-tier cities such as Beijing, Shanghai, Guangzhou, and Shenzhen, as well as rapidly emerging second-tier cities such as Chengdu, Nanjing, Chongqing, Qingdao, Hangzhou, and Changsha, are expected to meet the urban rail transit construction targets approved by the National Development and Reform Commission within a few years, with a total planned mileage of 8,600 kilometers. Therefore, the vibration issues associated with buildings along rail transit lines cannot be underestimated.

[0004] Currently, mainstream rail transit vibration isolation measures can be categorized as source isolation, transmission path isolation, and structural receptor isolation. Source isolation measures, including damping fasteners and track foundations, are generally only used during the construction phase of rail transit facilities and cannot be applied to completed rail transit facilities. Transmission path isolation involves installing fill trenches, wave blocks, or vibration isolation barriers within the transmission path. However, excavating isolation trenches in large cities is prohibitively expensive. Structural receptor isolation primarily involves installing vibration isolation bearings, but this approach is difficult to implement in high-rise buildings due to overturning moments. Trough isolation technology utilizes troughs excavated during high-rise construction and lays a composite vibration damping layer within them to reduce rail-induced building vibration. This method fully utilizes existing space and requires no additional work. The vibration characteristics of rail transit are dependent on the type of rail transit, operating hours, site type, and underground structure conditions. Therefore, the trough isolation layer and isolators must be tailored to the site's actual vibration conditions to suit diverse and complex environments. Summary of the Invention

[0005] In order to overcome the problems existing in the related art, the present disclosure provides a method and system for determining parameters of a vibration isolation device for a fertilizer tank in a building.

[0006] According to a first aspect of an embodiment of the present disclosure, a method for determining parameters of a building fertilizer tank vibration isolation device is provided. The building fertilizer tank vibration isolation device includes: a fertilizer tank vibration isolation layer, wherein the fertilizer tank vibration isolation layer includes a concrete layer, a bi-conical rubber layer, and a polystyrene board. The method includes:

[0007] The vibration acceleration signal of each target detection point is collected by using acceleration sensors placed at multiple target detection points;

[0008] Determining the peak frequency with the largest amplitude in the vibration response distribution according to the vibration acceleration signal of each target detection point;

[0009] Determining, based on the peak frequency with the largest amplitude in the vibration response distribution, a range of values ​​for the stiffness of the biconical rubber layer in the building fertilizer tank vibration isolation device, as well as a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer, wherein the stiffness of the biconical rubber layer includes axial stiffness and shear stiffness;

[0010] The rubber material and dimensional parameters of the double-cone rubber layer are determined according to the value range of the stiffness of the double-cone rubber layer, wherein the dimensional parameters include: cone height, bottom diameter, top diameter and taper.

[0011] In one embodiment, preferably, determining the peak frequency with the largest amplitude in the vibration response distribution according to the vibration acceleration signal of each target detection point includes:

[0012] Filtering the vibration acceleration signal of each target detection point by a bandpass filtering method based on the frequency domain to obtain a filtered acceleration signal;

[0013] Performing one-third octave calculation on the filtered acceleration signal to obtain the frequency-divided vibration level of the vibration response of each target detection point;

[0014] The frequency division vibration levels of all target detection points are weighted according to the distance to obtain the average vibration response distribution of all target detection points;

[0015] Select the peak frequency with the largest amplitude in the average vibration response distribution.

[0016] In one embodiment, preferably, filtering the vibration acceleration signal of each target detection point using a bandpass filtering method in the frequency domain to obtain a filtered acceleration signal includes:

[0017] Performing a fast Fourier transform on the vibration acceleration signal of each target detection point to obtain a Fourier spectrum;

[0018] Set the upper and lower limits of the bandpass frequency and calculate the cutoff range in the Fourier spectrum based on the upper and lower limits;

[0019] Truncating the Fourier spectrum to retain only values ​​within the truncation range and setting values ​​outside the truncation range to zero, thereby obtaining a processed Fourier spectrum;

[0020] Performing an inverse Fourier transform on the processed Fourier spectrum to obtain the filtered acceleration signal.

[0021] In one embodiment, preferably, determining the range of stiffness of the biconical rubber layer in the building fertilizer tank vibration isolation device, as well as the first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer based on the peak frequency with the largest amplitude in the vibration response distribution includes:

[0022] According to the peak frequency fmax with the largest amplitude in the vibration response distribution, the mass m of the double-conical rubber layer in the building fertilizer tank vibration isolation device is determined using the following first calculation formula: r and shear stiffness K sr The value range of

[0023]

[0024] The equivalent elastic modulus E of the fertilizer tank isolation layer is determined using the following second calculation formula: eq The value range of is:

[0025] E eq >E soil

[0026] According to the equivalent elastic modulus E of the fertilizer tank vibration isolation layer eq The first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer are determined using the following third calculation formula;

[0027]

[0028] where h c , h r , h h represent the thickness of the concrete layer, biconical rubber layer and polystyrene board layer respectively, E c , Er, E h represent the elastic modulus of the concrete layer, biconical rubber layer and polystyrene board layer respectively;

[0029] According to the elastic modulus, thickness and area of ​​the double-cone rubber layer, the axial stiffness K of the double-cone rubber layer is determined using the following fourth calculation formula: r The value range of

[0030]

[0031] Here, Sr represents the area of ​​the biconical rubber layer.

[0032] In one embodiment, preferably, determining the rubber material and dimensional parameters of the double-tapered rubber layer according to the value range of the stiffness of the double-tapered rubber layer includes:

[0033] Performing material property testing on the rubber material of the double-cone rubber layer to obtain stress-strain data and a stress-strain relationship σ-ε of the rubber material;

[0034] Performing data fitting on the stress-strain data to obtain the Rivlin coefficient of the MR model;

[0035] Through finite element parametric analysis, the corresponding relationship between the size parameters of the double-cone rubber layer and the Rivlin coefficient of the MR model was obtained.

[0036] The rubber material and dimensional parameters of the biconical rubber layer are determined according to the range of the stiffness of the biconical rubber layer, the stress-strain relationship σ-ε, the corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model.

[0037] In one embodiment, preferably, the expression of the MR model includes:

[0038] W=C 10 (I1-3)+C 01 (I2-3)

[0039] Where W represents the strain energy function, I i represents the Green strain invariant, C 01 and C 10 represents the Rivlin coefficient;

[0040] The corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model includes:

[0041]

[0042] Among them, α, β represent Rivlin coefficients, a1, b1, a2, b2 represent coefficient weights, h represents cone height, d2 represents base diameter, K r Indicates the axial stiffness, K sr represents the shear stiffness.

[0043] According to a second aspect of an embodiment of the present disclosure, a parameter determination system for a building fertilizer tank vibration isolation device is provided. The building fertilizer tank vibration isolation device includes: a fertilizer tank vibration isolation layer, the fertilizer tank vibration isolation layer including a concrete layer, a bi-conical rubber layer and a polystyrene board. The system includes:

[0044] An acquisition module is used to acquire a vibration acceleration signal of each target detection point through acceleration sensors placed at multiple target detection points;

[0045] A first determination module is configured to determine a peak frequency with a maximum amplitude in a vibration response distribution based on the vibration acceleration signal of each target detection point;

[0046] a second determining module, configured to determine a range of stiffness of a biconical rubber layer in the building fertilizer tank vibration isolation device, a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer based on a peak frequency with a maximum amplitude in the vibration response distribution, wherein the stiffness of the biconical rubber layer includes an axial stiffness and a shear stiffness;

[0047] The third determining module is configured to determine the rubber material and dimensional parameters of the double-conical rubber layer according to a range of stiffness values ​​of the double-conical rubber layer, wherein the dimensional parameters include cone height, bottom diameter, top diameter, and taper.

[0048] In one embodiment, preferably, the first determining module is used to:

[0049] Filtering the vibration acceleration signal of each target detection point by a bandpass filtering method based on the frequency domain to obtain a filtered acceleration signal;

[0050] Performing one-third octave calculation on the filtered acceleration signal to obtain the frequency-divided vibration level of the vibration response of each target detection point;

[0051] The frequency division vibration levels of all target detection points are weighted according to the distance to obtain the average vibration response distribution of all target detection points;

[0052] Select the peak frequency with the largest amplitude in the average vibration response distribution.

[0053] In one embodiment, preferably, filtering the vibration acceleration signal of each target detection point using a bandpass filtering method in the frequency domain to obtain a filtered acceleration signal includes:

[0054] Performing a fast Fourier transform on the vibration acceleration signal of each target detection point to obtain a Fourier spectrum;

[0055] Set the upper and lower limits of the bandpass frequency and calculate the cutoff range in the Fourier spectrum based on the upper and lower limits;

[0056] Truncating the Fourier spectrum to retain only values ​​within the truncation range and setting values ​​outside the truncation range to zero, thereby obtaining a processed Fourier spectrum;

[0057] Performing an inverse Fourier transform on the processed Fourier spectrum to obtain the filtered acceleration signal.

[0058] In one embodiment, preferably, the second determining module is used to:

[0059] According to the peak frequency fmax with the largest amplitude in the vibration response distribution, the mass m of the double-conical rubber layer in the building fertilizer tank vibration isolation device is determined using the following first calculation formula: r and shear stiffness K sr The value range of

[0060]

[0061] According to the elastic modulus E of the backfill soil on site soil , use the following second calculation formula to determine the equivalent elastic modulus E of the fertilizer tank isolation layer eq The value range of is:

[0062] E eq >E soil

[0063] According to the equivalent elastic modulus E of the fertilizer tank vibration isolation layer eqThe first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer are determined using the following third calculation formula;

[0064]

[0065] where h c , h r , h h represent the thickness of the concrete layer, biconical rubber layer and polystyrene board layer respectively, E c , Er, E h represent the elastic modulus of the concrete layer, biconical rubber layer and polystyrene board layer respectively;

[0066] According to the elastic modulus, thickness and area of ​​the double-cone rubber layer, the axial stiffness K of the double-cone rubber layer is determined using the following fourth calculation formula: r The value range of .

[0067] In one embodiment, preferably, the third determining module is used to:

[0068] Performing material property testing on the rubber material of the double-cone rubber layer to obtain stress-strain data and a stress-strain relationship σ-ε of the rubber material;

[0069] Performing data fitting on the stress-strain data to obtain the Rivlin coefficient of the MR model;

[0070] Through finite element parametric analysis, the corresponding relationship between the size parameters of the double-cone rubber layer and the Rivlin coefficient of the MR model was obtained.

[0071] The rubber material and dimensional parameters of the biconical rubber layer are determined according to the range of the stiffness of the biconical rubber layer, the stress-strain relationship σ-ε, the corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model.

[0072] In one embodiment, preferably, the expression of the MR model includes:

[0073] W=C 10 (I1-3)+C 01 (I2-3)

[0074] Where W represents the strain energy function, I i represents the Green strain invariant, C 01 and C 10 represents the Rivlin coefficient;

[0075] The corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model includes:

[0076]

[0077] Among them, α, β represent Rivlin coefficients, a1, b1, a2, b2 represent coefficient weights, h represents cone height, d2 represents base diameter, K r Indicates the axial stiffness, K sr represents the shear stiffness.

[0078] According to a third aspect of an embodiment of the present disclosure, a parameter determination system for a building fertilizer tank vibration isolation device is provided. The building fertilizer tank vibration isolation device includes: a fertilizer tank vibration isolation layer, the fertilizer tank vibration isolation layer including a concrete layer, a biconical rubber layer and a polystyrene board. The system includes:

[0079] processor;

[0080] a memory for storing processor-executable instructions;

[0081] Wherein, the processor is configured to:

[0082] The vibration acceleration signal of each target detection point is collected by using acceleration sensors placed at multiple target detection points;

[0083] Determining the peak frequency with the largest amplitude in the vibration response distribution according to the vibration acceleration signal of each target detection point;

[0084] Determining, based on the peak frequency with the largest amplitude in the vibration response distribution, a range of values ​​for the stiffness of the biconical rubber layer in the building fertilizer tank vibration isolation device, as well as a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer, wherein the stiffness of the biconical rubber layer includes axial stiffness and shear stiffness;

[0085] The rubber material and dimensional parameters of the double-cone rubber layer are determined according to the value range of the stiffness of the double-cone rubber layer, wherein the dimensional parameters include: cone height, bottom diameter, top diameter and taper.

[0086] According to a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, on which computer instructions are stored. When the instructions are executed by a processor, the steps of the method described in any one of the embodiments of the first aspect are implemented.

[0087] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0088] 1) In current rail transit vibration isolation technology, the isolator parameters are fixed and cannot be adjusted to the actual site conditions. In this invention, by first measuring the on-site vibration and analyzing the data to obtain the vibration characteristics, the vibration isolation layer and isolators are designed to achieve isolation of rail transit vibration in different complex environments.

[0089] 2) The present invention aims at the vibration isolation and safety requirements of the building, and uses the stiffness distribution formula and optimization algorithm to design the thickness and stiffness of each layer in the vibration isolation layer, so as to achieve the adjustability of the stiffness of the vibration isolation layer.

[0090] 3) The present invention fits the rubber material and the double-cone structure through MR theoretical model and finite element analysis, obtains the corresponding relationship between the double-cone rubber stiffness and the rubber material and vertebral parameters, and proposes a design method for the double-cone rubber layer.

[0091] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0093] Figure 1 The present invention is a flow chart showing a method for determining parameters of a vibration isolation device for a fertilizer tank in a building according to an exemplary embodiment.

[0094] Figure 2 This is a flowchart of step S102 in a method for determining parameters of a vibration isolation device for a fertilizer tank in a building, according to an exemplary embodiment.

[0095] Figure 3 It is a structural schematic diagram of a vibration isolation device for a fertilizer tank in a building according to an exemplary embodiment.

[0096] Figure 4 This is a flowchart of step S104 in a method for determining parameters of a vibration isolation device for a fertilizer tank in a building according to an exemplary embodiment.

[0097] Figure 5 FIG. 4 is a stress-strain relationship diagram of a rubber material according to an exemplary embodiment.

[0098] Figure 6 is a schematic diagram of MR parameter fitting according to an exemplary embodiment.

[0099] Figure 7 It is a schematic diagram showing the fitting relationship between the MR model parameters of a rubber and the axial stiffness of a double-cone rubber according to an exemplary embodiment.

[0100] Figure 8 It is a schematic diagram showing the fitting relationship between the MR model parameters of a rubber and the shear stiffness of a double-cone rubber according to an exemplary embodiment.

[0101] Figure 9 Schematic diagram showing the fitting relationship among the double-cone rubber size parameters, axial stiffness and MR model parameters according to an exemplary embodiment.

[0102] Figure 10 1 is a schematic diagram showing the fitting relationship among the size parameters, shear stiffness and MR model parameters of a double cone rubber according to an exemplary embodiment.

[0103] Figure 11 The present invention is a block diagram of a parameter determination system for a building fertilizer tank vibration isolation device according to an exemplary embodiment. DETAILED DESCRIPTION

[0104] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0105] Figure 1 The present invention is a flow chart showing a method for determining parameters of a vibration isolation device for a fertilizer tank in a building according to an exemplary embodiment.

[0106] like Figure 1 As shown, a method for determining parameters of a building fertilizer tank vibration isolation device, wherein the building fertilizer tank vibration isolation device includes: a fertilizer tank vibration isolation layer, wherein the fertilizer tank vibration isolation layer includes a concrete layer, a biconical rubber layer and a polystyrene board, and the method includes steps S101-S105:

[0107] Step S101, collecting a vibration acceleration signal of each target detection point by using acceleration sensors placed at multiple target detection points;

[0108] Place multiple acceleration sensors vertically on the site and continuously collect vibration acceleration signals a i , where i is the detection point number.

[0109] Step S102, determining the peak frequency with the largest amplitude in the vibration response distribution according to the vibration acceleration signal of each target detection point;

[0110] Step S103, determining a range of stiffness of a biconical rubber layer in the building fertilizer tank vibration isolation device, as well as a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer based on a peak frequency with a maximum amplitude in the vibration response distribution, wherein the stiffness of the biconical rubber layer includes axial stiffness and shear stiffness;

[0111] Step S104 : determining the rubber material and dimensional parameters of the double-conical rubber layer according to the value range of the stiffness of the double-conical rubber layer, wherein the dimensional parameters include: cone height, bottom diameter, top diameter, and taper.

[0112] In this embodiment, vibration characteristics are first determined through field vibration measurements and data analysis. Targeted designs are then made for the trough's vibration isolation layer and isolators, achieving vibration isolation for rail transit in diverse and complex environments. Furthermore, the thickness and stiffness of each layer within the isolation layer are designed using a stiffness distribution formula and optimization algorithm to meet the building's vibration isolation and safety requirements, enabling adjustable stiffness. Using an MR theoretical model and finite element analysis, the rubber material and biconical structure are fitted, yielding a correlation between the biconical rubber stiffness and the rubber material and cone parameters.

[0113] In one embodiment, preferably, step S102 includes:

[0114] Step S201: Filter the vibration acceleration signal of each target detection point using a bandpass filter in the frequency domain to obtain a filtered acceleration signal; the purpose of filtering is to remove the zero drift response and high frequency interference of the sensor.

[0115] In one embodiment, preferably, filtering the vibration acceleration signal of each target detection point using a bandpass filtering method in the frequency domain to obtain a filtered acceleration signal includes:

[0116] Perform fast Fourier transform on the vibration acceleration signal of each target detection point to obtain the Fourier spectrum Y i ;

[0117] Y i =fft(a i )

[0118] Set the upper limit of the passband frequency f high and the lower limit f low , and calculate the truncation range N in the Fourier spectrum based on the upper and lower limits high and N low ;

[0119] Since the vibration evaluation is performed using one-third octave bands, and indoor vibration evaluation generally focuses only on vibrations within a frequency range of 1 to 80 Hz, in this embodiment, the upper and lower limits of the passband frequency are set to 1 Hz and 80 Hz.

[0120]

[0121] Where Fs is the acceleration signal a i The sampling frequency, n is the number of signal points.

[0122] The Fourier spectrum is truncated, only the values ​​within the truncation range are retained, and the values ​​outside the truncation range are set to zero to obtain the processed Fourier spectrum Y i flter ;

[0123]

[0124] The processed Fourier spectrum Y i filter Perform inverse Fourier transform to obtain the filtered acceleration signal

[0125]

[0126] Step S202: Perform one-third octave calculation on the filtered acceleration signal to obtain the frequency-divided vibration level NVL of the vibration response of each target detection point. i,j ; Where i is the detection point number and j is the center frequency number.

[0127] Step S203: Calculate the frequency division level NVL of all target detection points. i，j Perform weighted calculation according to distance to obtain the average vibration response distribution V = [V1, V2, …, Vj] of all target detection points;

[0128]

[0129] Step S204: selecting the peak frequency with the largest amplitude in the average vibration response distribution.

[0130] In one embodiment, preferably, determining the range of stiffness of the biconical rubber layer in the building fertilizer tank vibration isolation device, as well as the first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer based on the peak frequency with the largest amplitude in the vibration response distribution includes:

[0131] According to the peak frequency fmax with the largest amplitude in the vibration response distribution, the mass m of the double-conical rubber layer in the building fertilizer tank vibration isolation device is determined using the following first calculation formula:r and shear stiffness K sr The value range of

[0132]

[0133] According to the elastic modulus E of the backfill soil on site soil , use the following second calculation formula to determine the equivalent elastic modulus E of the fertilizer tank isolation layer eq The value range of is:

[0134] E eq >E soil

[0135] According to the equivalent elastic modulus E of the fertilizer tank vibration isolation layer eq The first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer are determined using the following third calculation formula;

[0136]

[0137] Among them, such as Figure 3 As shown, h c , h r , h h represent the thickness of the concrete layer, biconical rubber layer and polystyrene board layer respectively, E c , Er, E h represent the elastic modulus of the concrete layer, biconical rubber layer and polystyrene board layer respectively;

[0138] According to the elastic modulus, thickness and area of ​​the double-cone rubber layer, the axial stiffness K of the double-cone rubber layer is determined using the following fourth calculation formula: r The value range of is:

[0139]

[0140] Here, Sr represents the area of ​​the biconical rubber layer.

[0141] like Figure 4 As shown, in one embodiment, preferably, step S104 includes:

[0142] Step S401, performing a material property test on the rubber material of the double-cone rubber layer to obtain stress-strain data and stress-strain relationship σ-ε of the rubber material; the stress-strain relationship is as follows: Figure 5 shown.

[0143] Step S402, performing data fitting on the stress-strain data to obtain the Rivlin coefficient of the MR model;

[0144] In one embodiment, preferably, the expression of the MR model includes:

[0145] W=C 10 (I1-3)+C 01 (I2-3)

[0146] Where W represents the strain energy function, I i represents the Green strain invariant, C 01 and C 10 represents the Rivlin coefficient;

[0147] The corresponding expression of the relationship between the coefficient and rubber stress and strain can be derived from the following formula:

[0148] λ i is the elongation in the i direction, ε i is the strain in the i direction

[0149] λ i =1+ε i

[0150]

[0151]

[0152]

[0153]

[0154]

[0155] Step S403, through finite element parametric analysis, fitting is performed to obtain the corresponding relationship between the size parameters of the double-cone rubber layer and the Rivlin coefficient of the MR model, such as Figure 6 Specifically, the size of the double-cone rubber middle plate can be 100×100×15 mm. The diameter d1 of the bottom surface of the rubber cone is 60 mm.

[0156] Step S404 , determining the rubber material and dimensional parameters of the bi-conical rubber layer according to the stiffness value range of the bi-conical rubber layer, the stress-strain relationship σ-ε, the corresponding relationship between the dimensional parameters of the bi-conical rubber layer and the Rivlin coefficient of the MR model.

[0157] The corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model includes:

[0158]

[0159] Among them, α, β represent Rivlin coefficients, a1, b1, a2, b2 represent coefficient weights, h represents cone height, d2 represents base diameter, K r Indicates the axial stiffness, K sr represents the shear stiffness.

[0160] in, Figure 7 and Figure 8 This is an example of the fitting relationship between the MR model parameters of rubber and the stiffness of the biconical rubber. It can be seen that the stiffness of the rubber layer and the MR parameters are very linear. Figure 9 and Figure 10 This is an example of the fitting relationship between the size parameters of the double-cone rubber and the stiffness and MR model parameters. It can be obtained that a1, a2, b1, and b2 are 8.235, -0.756, 0.3381, and -1.112 respectively.

[0161] Therefore, the axial stiffness K of the biconical rubber r and shear stiffness K sr The stiffness is a function of the rubber material and dimensions. By optimizing the rubber material and dimensions, a product can be designed to meet the required stiffness. If this is not possible, a new suitable rubber material must be found and the above design process repeated. In this example, the biconical rubber layer achieves axial and shear stiffnesses of 260.1 N / mm and 51.0 N / mm, respectively.

[0162] Figure 11 The present invention is a block diagram of a parameter determination system for a building fertilizer tank vibration isolation device according to an exemplary embodiment.

[0163] According to a second aspect of the embodiment of the present disclosure, a parameter determination system for a building fertilizer tank vibration isolation device is provided, wherein the building fertilizer tank vibration isolation device comprises: a fertilizer tank vibration isolation layer, wherein the fertilizer tank vibration isolation layer comprises a concrete layer, a double-conical rubber layer and a polystyrene board, such as Figure 11 As shown, the system includes:

[0164] The acquisition module 1101 is configured to acquire a vibration acceleration signal of each target detection point through acceleration sensors placed at multiple target detection points;

[0165] A first determining module 1102 is configured to determine a peak frequency with the largest amplitude in a vibration response distribution based on the vibration acceleration signal of each target detection point;

[0166] a second determining module 1103, configured to determine a range of stiffness of a biconical rubber layer in the building fertilizer tank vibration isolation device, a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer based on a peak frequency with a maximum amplitude in the vibration response distribution, wherein the stiffness of the biconical rubber layer includes axial stiffness and shear stiffness;

[0167] The third determining module 1104 is configured to determine the rubber material and dimensional parameters of the double-tapered rubber layer according to the value range of the stiffness of the double-tapered rubber layer, wherein the dimensional parameters include: cone height, bottom diameter, top diameter, and taper.

[0168] In one embodiment, preferably, the first determining module is used to:

[0169] Filtering the vibration acceleration signal of each target detection point by a bandpass filtering method based on the frequency domain to obtain a filtered acceleration signal;

[0170] Performing one-third octave calculation on the filtered acceleration signal to obtain the frequency-divided vibration level of the vibration response of each target detection point;

[0171] The frequency division vibration levels of all target detection points are weighted according to the distance to obtain the average vibration response distribution of all target detection points;

[0172] Select the peak frequency with the largest amplitude in the average vibration response distribution.

[0173] In one embodiment, preferably, filtering the vibration acceleration signal of each target detection point using a bandpass filtering method in the frequency domain to obtain a filtered acceleration signal includes:

[0174] Performing a fast Fourier transform on the vibration acceleration signal of each target detection point to obtain a Fourier spectrum;

[0175] Set the upper and lower limits of the bandpass frequency and calculate the cutoff range in the Fourier spectrum based on the upper and lower limits;

[0176] Truncating the Fourier spectrum to retain only values ​​within the truncation range and setting values ​​outside the truncation range to zero, thereby obtaining a processed Fourier spectrum;

[0177] Performing an inverse Fourier transform on the processed Fourier spectrum to obtain the filtered acceleration signal.

[0178] In one embodiment, preferably, the second determining module is used to:

[0179] According to the peak frequency fmax with the largest amplitude in the vibration response distribution, the mass m of the double-conical rubber layer in the building fertilizer tank vibration isolation device is determined using the following first calculation formula: r and shear stiffness K sr The value range of

[0180]

[0181] According to the elastic modulus E of the backfill soil on site soil , use the following second calculation formula to determine the equivalent elastic modulus E of the fertilizer tank isolation layer eq The value range of is:

[0182] E eq >E soil

[0183] According to the equivalent elastic modulus E of the fertilizer tank vibration isolation layer eq The first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer are determined using the following third calculation formula;

[0184]

[0185] where h c , h r , h h represent the thickness of the concrete layer, biconical rubber layer and polystyrene board layer respectively, E c , Er, E h represent the elastic modulus of the concrete layer, biconical rubber layer and polystyrene board layer respectively;

[0186] According to the elastic modulus, thickness and area of ​​the double-cone rubber layer, the axial stiffness K of the double-cone rubber layer is determined using the following fourth calculation formula: r The value range of .

[0187] In one embodiment, preferably, the third determining module is used to:

[0188] Performing material property testing on the rubber material of the double-cone rubber layer to obtain stress-strain data and a stress-strain relationship σ-ε of the rubber material;

[0189] Performing data fitting on the stress-strain data to obtain the Rivlin coefficient of the MR model;

[0190] Through finite element parametric analysis, the corresponding relationship between the size parameters of the double-cone rubber layer and the Rivlin coefficient of the MR model was obtained.

[0191] The rubber material and dimensional parameters of the biconical rubber layer are determined according to the range of the stiffness of the biconical rubber layer, the stress-strain relationship σ-ε, the corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model.

[0192] In one embodiment, preferably, the expression of the MR model includes:

[0193] W=C 10 (I1-3)+C 01 (I2-3)

[0194] Where W represents the strain energy function, I i represents the Green strain invariant, C 01 and C 10 represents the Rivlin coefficient;

[0195] The corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model includes:

[0196]

[0197] Among them, α, β represent Rivlin coefficients, a1, b1, a2, b2 represent coefficient weights, h represents cone height, d2 represents base diameter, K r Indicates the axial stiffness, K sr represents the shear stiffness.

[0198] According to a third aspect of an embodiment of the present disclosure, a parameter determination system for a building fertilizer tank vibration isolation device is provided. The building fertilizer tank vibration isolation device includes: a fertilizer tank vibration isolation layer, the fertilizer tank vibration isolation layer including a concrete layer, a biconical rubber layer and a polystyrene board. The system includes:

[0199] processor;

[0200] a memory for storing processor-executable instructions;

[0201] Wherein, the processor is configured to:

[0202] The vibration acceleration signal of each target detection point is collected by using acceleration sensors placed at multiple target detection points;

[0203] Determining the peak frequency with the largest amplitude in the vibration response distribution according to the vibration acceleration signal of each target detection point;

[0204] Determining, based on the peak frequency with the largest amplitude in the vibration response distribution, a range of values ​​for the stiffness of the biconical rubber layer in the building fertilizer tank vibration isolation device, as well as a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer, wherein the stiffness of the biconical rubber layer includes axial stiffness and shear stiffness;

[0205] The rubber material and dimensional parameters of the double-cone rubber layer are determined according to the value range of the stiffness of the double-cone rubber layer, wherein the dimensional parameters include: cone height, bottom diameter, top diameter and taper.

[0206] According to a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, on which computer instructions are stored. When the instructions are executed by a processor, the steps of the method described in any one of the embodiments of the first aspect are implemented.

[0207] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0208] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0209] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0210] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0211] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for determining parameters of a vibration isolation device for a fertilizer tank in a building, characterized in that: The vibration isolation device for a fertilizer tank in a building comprises: a fertilizer tank vibration isolation layer, wherein the fertilizer tank vibration isolation layer comprises a concrete layer, a biconical rubber layer and a polystyrene board layer, and the method comprises: The vibration acceleration signal of each target detection point is collected by using acceleration sensors placed at multiple target detection points; Determining the peak frequency with the largest amplitude in the vibration response distribution according to the vibration acceleration signal of each target detection point; Determining, based on the peak frequency with the largest amplitude in the vibration response distribution, a range of values ​​for the stiffness of the biconical rubber layer in the building fertilizer tank vibration isolation device, as well as a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer, wherein the stiffness of the biconical rubber layer includes axial stiffness and shear stiffness; Determine the rubber material and dimensional parameters of the double-cone rubber layer according to the value range of the stiffness of the double-cone rubber layer, wherein the dimensional parameters include: cone height, bottom diameter, top diameter and taper; Determining a range of stiffness of the biconical rubber layer in the building fertilizer tank vibration isolation device, as well as a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer, based on a peak frequency with a maximum amplitude in the vibration response distribution, includes: According to the peak frequency fmax with the largest amplitude in the vibration response distribution, the mass m of the double-conical rubber layer in the building fertilizer tank vibration isolation device is determined using the following first calculation formula: r and shear stiffness K sr The value range of According to the elastic modulus E of the backfill soil on site soil , use the following second calculation formula to determine the equivalent elastic modulus E of the fertilizer tank isolation layer eq The value range of is: AND eq >E soil According to the equivalent elastic modulus E of the fertilizer tank vibration isolation layer eq The first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer are determined using the following third calculation formula; where h c , h r , h h represent the thickness of the concrete layer, biconical rubber layer and polystyrene board layer respectively, E c , E r , E h represent the elastic modulus of the concrete layer, the biconical rubber layer and the polystyrene board layer respectively; According to the elastic modulus, thickness and area of ​​the double-cone rubber layer, the axial stiffness K of the double-cone rubber layer is determined using the following fourth calculation formula: r The value range of Among them, S r represents the area of ​​the biconical rubber layer.

2. The parameter determination method of the building fertilizer tank vibration isolation device according to claim 1 is characterized in that: Determining the peak frequency with the maximum amplitude in the vibration response distribution according to the vibration acceleration signal of each target detection point includes: Filtering the vibration acceleration signal of each target detection point by a bandpass filtering method based on the frequency domain to obtain a filtered acceleration signal; Performing one-third octave calculation on the filtered acceleration signal to obtain the frequency-divided vibration level of the vibration response of each target detection point; The frequency division vibration levels of all target detection points are weighted according to the distance to obtain the average vibration response distribution of all target detection points; Select the peak frequency with the largest amplitude in the average vibration response distribution.

3. The parameter determination method of the building fertilizer tank vibration isolation device according to claim 2, characterized in that: The vibration acceleration signal of each target detection point is filtered using a bandpass filtering method in the frequency domain to obtain a filtered acceleration signal, including: Performing a fast Fourier transform on the vibration acceleration signal of each target detection point to obtain a Fourier spectrum; Set the upper and lower limits of the bandpass frequency and calculate the cutoff range in the Fourier spectrum based on the upper and lower limits; Truncating the Fourier spectrum to retain only values ​​within the truncation range and setting values ​​outside the truncation range to zero, thereby obtaining a processed Fourier spectrum; Performing an inverse Fourier transform on the processed Fourier spectrum to obtain the filtered acceleration signal.

4. The parameter determination method of the building fertilizer tank vibration isolation device according to claim 1 is characterized in that: Determining the rubber material and dimensional parameters of the double-tapered rubber layer according to the value range of the stiffness of the double-tapered rubber layer includes: Performing material property testing on the rubber material of the double-cone rubber layer to obtain stress-strain data and a stress-strain relationship σ-ε of the rubber material; Performing data fitting on the stress-strain data to obtain the Rivlin coefficient of the MR model; Through finite element parametric analysis, the corresponding relationship between the size parameters of the double-cone rubber layer and the Rivlin coefficient of the MR model was obtained. The rubber material and dimensional parameters of the biconical rubber layer are determined according to the range of the stiffness of the biconical rubber layer, the stress-strain relationship σ-ε, the corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model.

5. The parameter determination method of the building fertilizer tank vibration isolation device according to claim 1 is characterized in that: The expressions of the MR model include: W=C 10 (I1-3)+C 01 (I2-3) Where W represents the strain energy function, I i represents the Green strain invariant, C 01 and C 10 represents the Rivlin coefficient; The corresponding relationship between the dimensional parameters of the biconical rubber layer and the Rivlin coefficient of the MR model includes: Among them, α, β represent Rivlin coefficients, a1, b1, a2, b2 represent coefficient weights, h represents cone height, d2 represents base diameter, K r Indicates the axial stiffness, K sr represents the shear stiffness.

6. A parameter determination system for a building fertilizer tank vibration isolation device, characterized in that: The vibration isolation device for a fertilizer tank in a building comprises: a fertilizer tank vibration isolation layer, wherein the fertilizer tank vibration isolation layer comprises a concrete layer, a biconical rubber layer and a polystyrene board layer. The system comprises: An acquisition module is used to acquire a vibration acceleration signal of each target detection point through acceleration sensors placed at multiple target detection points; A first determination module is configured to determine a peak frequency with a maximum amplitude in a vibration response distribution based on the vibration acceleration signal of each target detection point; a second determining module, configured to determine a range of stiffness of a biconical rubber layer in the building fertilizer tank vibration isolation device, a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer based on a peak frequency with a maximum amplitude in the vibration response distribution, wherein the stiffness of the biconical rubber layer includes an axial stiffness and a shear stiffness; a third determining module, configured to determine the rubber material and dimensional parameters of the double-tapered rubber layer according to a value range of the stiffness of the double-tapered rubber layer, wherein the dimensional parameters include: cone height, bottom diameter, top diameter, and taper; Determining a range of stiffness of the biconical rubber layer in the building fertilizer tank vibration isolation device, as well as a first thickness of the concrete layer, a second thickness of the biconical rubber layer, and a third thickness of the polystyrene board layer, based on a peak frequency with a maximum amplitude in the vibration response distribution, includes: According to the peak frequency fmax with the largest amplitude in the vibration response distribution, the mass m of the double-conical rubber layer in the building fertilizer tank vibration isolation device is determined using the following first calculation formula: r and shear stiffness K sr The value range of According to the elastic modulus E of the backfill soil on site soil , use the following second calculation formula to determine the equivalent elastic modulus E of the fertilizer tank isolation layer eq The value range of is: AND eq >E soil According to the equivalent elastic modulus E of the fertilizer tank vibration isolation layer eq The first thickness of the concrete layer, the second thickness of the biconical rubber layer, and the third thickness of the polystyrene board layer are determined using the following third calculation formula; where h c , h r , h h represent the thickness of the concrete layer, biconical rubber layer and polystyrene board layer respectively, E c , E r , E h represent the elastic modulus of the concrete layer, the biconical rubber layer and the polystyrene board layer respectively; According to the elastic modulus, thickness and area of ​​the double-cone rubber layer, the axial stiffness K of the double-cone rubber layer is determined using the following fourth calculation formula: r The value range of Among them, S r represents the area of ​​the biconical rubber layer.

7. A computer-readable storage medium having computer instructions stored thereon, characterized in that: When the instruction is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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