Reverse optimization design method and system for internal combustion engine vibration isolator under specific frequency

Abstract

The invention discloses a reverse optimization design method and system for a vibration isolator of an internal combustion engine under a specific frequency, and relates to the technical field of vibration and noise reduction of vibration response of the internal combustion engine, and the method comprises the steps: obtaining the vibration characteristics of the vibration isolator of the internal combustion engine under a typical working condition through a finite element analysis method; according to the vibration response, the target frequency of reverse optimization design of the vibration isolator is determined; establishing a finite element model of the vibration isolator of the internal combustion engine, applying load and constraint, and obtaining transmission loss; a rubber body multi-layer structure in the middle of the vibration isolator is used as an optimization design domain, transmission loss minimization is used as a target, and the region is designed through a genetic algorithm. According to the reverse optimization design method for the internal combustion engine vibration isolator under the specific frequency, reverse thinking is adopted, the vibration reduction requirement is firstly determined, then the vibration isolator is designed and customized according to the requirement, and therefore the vibration isolator and an internal combustion engine have better adaptability, and the vibration isolation effect is maximized.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction and noise reduction of internal combustion engine vibration response, and in particular to a reverse optimization design method and system for an internal combustion engine vibration isolator at a specific frequency. Background Art

[0002] Modern internal combustion engines are widely used in the fields of ships, vehicles and engineering machinery, and have become the most important thermal power machinery with a wide range of uses and large consumption. Generally speaking, the working environment of internal combustion engines is relatively harsh, and the requirements for the materials and structural design of each component are relatively strict. The above characteristics result in the characteristics of large size, high vibration and noise of internal combustion engines. The problem of excessive vibration brings comfort problems to the occupants of vehicles, and in the military field, it also poses challenges to the stealth of ships and other equipment.

[0003] The internal combustion engine has a complex structure and many vibration excitation sources during operation. The optimization design of the internal combustion engine itself needs to take many aspects into consideration, otherwise there will be little effect, and the design cycle is long and the design process is cumbersome. Therefore, in comparison, the optimization of the vibration isolator is relatively convenient, direct and effective.

[0004] In order to make the vibration isolator work more effectively, in actual engineering applications, a vibration isolator that matches the internal combustion engine model is selected, but this matching basis has a lot of redundant space. Alternatively, the installation position and installation quantity are optimized according to the selected vibration isolator. These methods do not play the full role of the vibration isolation itself. Such a design is not systematic, not only consumes a lot of time cost, but the design result may not be optimal, which shows that there is still a lot of design space for the design of vibration isolators. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the technical problem solved by the present invention is: in response to the vibration and noise problem generated by the existing internal combustion engine on the base, a reverse optimization design method for the internal combustion engine vibration isolator at a specific frequency in the entire design domain is provided, aiming to optimize the design of a vibration isolator that can be absolutely adapted to the actual internal combustion engine, and form a set of customized optimization methods designed on demand, so as to minimize the vibration generated by the internal combustion engine on the base and provide more references for the optimization design of the vibration isolator.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a reverse optimization design method of an internal combustion engine vibration isolator at a specific frequency, comprising:

[0008] The vibration characteristics of the internal combustion engine vibration isolator under typical working conditions are obtained by finite element analysis method;

[0009] According to the vibration response, determine the target frequency of the inverse optimization design of the vibration isolator;

[0010] Establish a finite element model of the vibration isolator of the internal combustion engine, apply loads and constraints, and obtain its transmission loss;

[0011] The multilayer structure of the rubber body in the middle part of the vibration isolator is taken as the optimization design domain, and the goal is to minimize the transmission loss. The genetic algorithm is used to design this area.

[0012] As a preferred scheme of the inverse optimization design method of the internal combustion engine vibration isolator at a specific frequency described in the present invention, wherein: the acquisition of the vibration characteristics of the internal combustion engine vibration isolator under typical working conditions includes establishing a geometric model required for the internal combustion engine vibration analysis, and performing finite element meshing, and obtaining the vibration response at the internal combustion engine base through the finite element analysis method.

[0013] As a preferred solution of the inverse optimization design method of the internal combustion engine vibration isolator at a specific frequency of the present invention, wherein: the transmission loss is expressed as,

[0014]

[0015] Among them, d in is the vibration response signal generated by the excitation, is the input signal, d out is the vibration response signal of the support seat, which is the output signal;

[0016] When TL<0, it is judged that the structure has vibration isolation effect, and when TL≥0, it is judged that the structure has no vibration isolation effect.

[0017] As a preferred solution of the inverse optimization design method of the internal combustion engine vibration isolator at a specific frequency of the present invention, wherein: according to the transmission loss TL of the internal combustion engine vibration isolator, the rubber body in the middle part of the vibration isolator is optimized, which is expressed as:

[0018]

[0019] Where f(X) is the optimization target, is the transmission loss coefficient of the isolator, X is the density value of the design domain, N is the number of design variables, n is the number of target points within the target frequency range, Ku = ω 2 Mu indicates that the basic dynamic balance must be satisfied during the structural analysis and calculation, K is the stiffness matrix of the structure, u is the displacement matrix of the structure, ω is the circular frequency, and M is the mass matrix.

[0020] As a preferred solution of the inverse optimization design method of the internal combustion engine vibration isolator at a specific frequency of the present invention, wherein: the design of the region by using a genetic algorithm includes generating an initialization population P0=20;

[0021] Conduct finite element analysis of transmission loss on the population's vibration isolators;

[0022] The results of the finite element analysis of the population were evaluated;

[0023] Select individuals with better performance and keep them;

[0024] Perform crossover and mutation on the retained individuals.

[0025] As a preferred solution of the inverse optimization design method of the internal combustion engine vibration isolator at a specific frequency described in the present invention, wherein: in the optimization of the rubber body in the middle part of the vibration isolator, the optimal result is output, and when the individual is updated by the survival of the fittest, the optimal refers to the number of frequency points that meet the constraint to reach the preset standard, that is, the optimal should be based on the number of constraints. The current iteration step is recorded as i, and its objective function f is saved. i (X).

[0026] As a preferred solution of the inverse optimization design method of the internal combustion engine vibration isolator at a specific frequency of the present invention, wherein: the number of constraints satisfied is expressed as,

[0027]

[0028] When the number of constraints is met, the optimization model is output as the final result.

[0029] Another object of the present invention is to provide a reverse optimization design system for an internal combustion engine vibration isolator at a specific frequency, which can solve the vibration noise problem generated by the existing internal combustion engine on the base by constructing a reverse optimization design system for an internal combustion engine vibration isolator at a specific frequency.

[0030] In order to solve the above technical problems, the present invention provides the following technical solutions: a reverse optimization design system for an internal combustion engine vibration isolator at a specific frequency, comprising: a vibration analysis module, a probability judgment module, a loss acquisition module and an optimization design module; the vibration analysis module is used to obtain the vibration characteristics of the internal combustion engine vibration isolator under typical working conditions through a finite element analysis method; the probability judgment module is used to determine the target frequency of the reverse optimization design of the vibration isolator according to the vibration response; the loss acquisition module is used to establish a finite element model of the vibration isolator of the internal combustion engine, apply loads and constraints, and obtain its transmission loss; the optimization design module is used to use the multilayer structure of the rubber body in the middle part of the vibration isolator as the optimization design domain, minimize the transmission loss as the goal, and use a genetic algorithm to design the area.

[0031] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the inverse optimization design method of the internal combustion engine vibration isolator at a specific frequency are implemented.

[0032] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency.

[0033] Beneficial effects of the present invention: ① The reverse optimization design method of the internal combustion engine vibration isolator at a specific frequency proposed by the present invention is designed on demand, so that the vibration isolator is more compatible with the internal combustion engine and can solve the vibration problem to the greatest extent.

[0034] ② The judgment criterion of the optimization mathematical model of the internal combustion engine vibration isolator proposed in the present invention is whether the transmission loss constraints at each frequency point can be fully met, which "relaxes" the optimization problem and increases the degree of freedom of structural design.

[0035] ③ The basis for the vibration reduction effect in the optimization design method of the internal combustion engine vibration isolator proposed in the present invention is that the transmission loss is less than 0, but according to different application requirements, this judgment basis can be appropriately adjusted, providing more possibilities for structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0037] Figure 1 An overall flow chart of a reverse optimization design method for an internal combustion engine vibration isolator at a specific frequency provided by one embodiment of the present invention.

[0038] Figure 2 A composition diagram of an internal combustion engine vibration isolator according to an inverse optimization design method of an internal combustion engine vibration isolator at a specific frequency provided by one embodiment of the present invention.

[0039] Figure 3 A schematic diagram of the middle multi-layer rubber of an inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency provided by an embodiment of the present invention.

[0040] Figure 4 A middle multi-layer rubber cross-sectional view and coding of an inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency provided by an embodiment of the present invention.

[0041] Figure 5 A finite element model and appearance diagram of a vibration isolator for an internal combustion engine according to an inverse optimization design method at a specific frequency provided by an embodiment of the present invention.

[0042] Figure 6A load and constraint diagram of an inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency provided by an embodiment of the present invention.

[0043] Figure 7 A diagram showing the distribution of the intermediate rubber layer and the metal layer of an inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency provided by one embodiment of the present invention.

[0044] Figure 8 A transmission loss diagram of an inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency provided by one embodiment of the present invention.

[0045] Fig. 9 A diagram showing the distribution of the middle rubber layer and the metal layer of the vibration isolator after optimization according to an inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency provided by one embodiment of the present invention.

[0046] Fig.10 An optimized transmission loss diagram of an inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0049] Example 1, reference Figure 1-Figure 4 , which is an embodiment of the present invention, provides a reverse optimization design method for an internal combustion engine vibration isolator at a specific frequency, comprising:

[0050] S1: The vibration characteristics of the internal combustion engine isolator under typical working conditions are obtained by finite element analysis method:

[0051] Establish the geometric model required for the vibration analysis of the internal combustion engine, divide it into finite element meshes, and finally use the finite element analysis method to obtain the vibration response at the base of the internal combustion engine. The vibration response should be picked up near the vibration isolator position of the internal combustion engine base, and the average of multiple responses should be taken;

[0052] S2: According to the vibration response at the base of the internal combustion engine, determine in which frequency range the vibration is the largest. This frequency range [ω low ,ω up ] is the target frequency, which can also be multiple frequency ranges, but the total target frequency range should not be too large, and the intermediate frequency points should be within 10 to avoid the phenomenon of no solution:

[0053] S3: Establish a finite element model of the vibration isolator of the internal combustion engine, where Figure 2 The internal combustion engine vibration isolator consists of a support seat 1, an external end cover 2, and a middle multilayer rubber 3. Apply loads and constraints to its finite element model. The constraints should be consistent with the actual installation constraints, and the load can be equivalent to the actual load level. The transmission loss TL is obtained, which is defined as formula (1):

[0054]

[0055] In formula (1), d in is the vibration response signal generated by the excitation, is the input signal, d out is the vibration response signal of the support seat, and is the output signal. When TL<0, it means that the structure has a vibration isolation effect, otherwise, it has no vibration isolation effect. When the vibration isolation frequency range of the optimization result is much larger than the target frequency, the judgment requirements can be increased. The embodiment of the present invention selects TL<-5 to meet higher requirements.

[0056] S4: Establishment of mathematical optimization model of internal combustion engine vibration isolator:

[0057] According to the transmission loss TL of the vibration isolator of the internal combustion engine, its essence is to optimize the rubber body in the middle part of the vibration isolator. The middle material of the vibration isolator is a composite of multiple vibration-damping materials (here two materials are taken as an example). The middle multi-layer rubber is as follows: Figure 3 As shown, the mathematical optimization model is constructed using the following formula:

[0058]

[0059] In formula (2), f(X) is the optimization target and also the transmission loss coefficient of the vibration isolator, X is the density value of the design domain, N is the number of design variables, n is the number of target points within the target frequency range, and Ku = ω 2 Mu indicates that the structural analysis and calculation must satisfy the basic dynamic balance, where K is the stiffness matrix of the structure, u is the displacement matrix of the structure, ω is the circular frequency, and M is the mass matrix. Before optimization, the design domain (multi-layer rubber in the middle) needs to be encoded. The specific details are as follows Figure 4 shown.

[0060] Compared with previous optimization methods, the optimization model established by the present invention adds frequency constraints and transmission loss constraints under the corresponding range, so that the design can be designed on demand, improve the compatibility with the internal combustion engine vibration isolator, and also significantly improve the performance within the target frequency range.

[0061] S5: Genetic Algorithm Optimization

[0062] Generate an initial population P0=20;

[0063] Conduct finite element analysis of transmission loss on the population's vibration isolators;

[0064] The results of the finite element analysis of the population were evaluated;

[0065] Select individuals with better performance and keep them;

[0066] Perform crossover and mutation on the retained individuals.

[0067] S6: Output the optimal result:

[0068] In the optimization of the rubber body in the middle part of the vibration isolator, the optimal result is output. When the individuals are updated by the survival of the fittest, "optimal" means that the number of frequency points that meet the constraints is large, that is, the optimal should be based on the number of constraints. The current iteration step is recorded as i, and its objective function f is saved. i (X).

[0069] S7: Result determination:

[0070] Whether the constraints can be fully met, that is, the transmission loss within the target frequency range is less than 0:

[0071]

[0072] If it is satisfied, then S8 is performed to output the optimized model as the final result. Otherwise, it returns to step ② of S5 to recalculate.

[0073] S8: Output the final optimization results

[0074] When the convergence conditions are met, the optimization model can be output as the final result.

[0075] Compared with previous optimization methods, the optimization model established by the present invention adds frequency constraints and transmission loss constraints under the corresponding range, so that the design can be designed on demand, improve the compatibility with the internal combustion engine vibration isolator, and also significantly improve the performance within the target frequency range.

[0076] Embodiment 2 is an embodiment of the present invention, which provides a reverse optimization design system for an internal combustion engine vibration isolator at a specific frequency, comprising:

[0077] Vibration analysis module, probability judgment module, loss acquisition module and optimization design module;

[0078] The vibration analysis module is used to obtain the vibration characteristics of the internal combustion engine vibration isolator under typical working conditions through the finite element analysis method;

[0079] The probability judgment module is used to determine the target frequency of the inverse optimization design of the vibration isolator according to the vibration response;

[0080] The loss acquisition module is used to establish the finite element model of the vibration isolator of the internal combustion engine, apply loads and constraints, and obtain its transmission loss;

[0081] The optimization design module is used to design the multilayer structure of the rubber body in the middle part of the vibration isolator using a genetic algorithm with the goal of minimizing transmission loss.

[0082] Embodiment 3, an embodiment of the present invention, is different from the first two embodiments in that:

[0083] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0084] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0085] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0086] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0087] Example 4, reference Figure 5-Figure 10 , which is an embodiment of the present invention, provides a reverse optimization design method for an internal combustion engine vibration isolator at a specific frequency. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through simulation experiments.

[0088] A simplified model of a vibration isolator is taken as the research object. Its finite element model and appearance are shown in Figure 5 The load is evenly distributed on the upper panel of the external end cover, the total load is 1000N, and the constraint is fixed at the bolt hole. The load and constraint are as follows Figure 6 shown.

[0089] First, assume an initial model, the distribution of the middle rubber layer and the metal layer is as follows Figure 7 Before conducting the vibration harmonic response analysis, the material properties are set first, and the material parameters are shown in Table 1.

[0090] Table 1 Material parameters

[0091] Material Density kg / m3 Elastic modulus / MPa Poisson's ratio steel 7850 210000 0.3 rubber 1300 0.1 0.47

[0092] The vibration response analysis of the vibration isolator is performed. According to the vibration response of the upper panel of the external end cover of the vibration isolator and the vibration response of the bottom of the support base, the transmission loss of the initial model can be calculated. The transmission loss is as follows: Figure 8Therefore, it is determined that the frequency range [370,500Hz] has the largest vibration and the transmission loss is greater than 0, which is the target frequency.

[0093] By encoding the material distribution of the original model, the order from outside to inside is [1,0,1,0,1,0,1,0,1,1]. After optimization, the encoding result is [1,1,1,0,0,0,1,1,1,1], where 1 represents steel material and 0 represents rubber material. The distribution of the middle rubber layer and metal layer of the vibration isolator after optimization is shown in the figure. Fig. 9 shown.

[0094] At the same time, the optimized transmission loss can also be obtained, as shown in the following example: Fig.10 As shown in the figure, it can be seen that the optimized transmission loss is not only less than 0 in the target frequency range, but also the transmission loss coefficient in other frequency ranges is reduced. Therefore, it can be fully explained that the vibration reduction effect of the optimized vibration isolator is significantly improved.

[0095] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A reverse optimization design method for an internal combustion engine vibration isolator at a specific frequency, characterized in that: include: The vibration characteristics of the internal combustion engine vibration isolator under typical working conditions are obtained by finite element analysis method; According to the vibration response, determine the target frequency of the inverse optimization design of the vibration isolator; Establish a finite element model of the vibration isolator of the internal combustion engine, apply loads and constraints, and obtain its transmission loss; The multilayer structure of the rubber body in the middle part of the vibration isolator is taken as the optimization design domain, and the goal is to minimize the transmission loss. The genetic algorithm is used to design this area.

2. The inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency as claimed in claim 1, characterized in that: The method of obtaining the vibration characteristics of the internal combustion engine vibration isolator under typical working conditions includes establishing a geometric model required for the internal combustion engine vibration analysis, performing finite element meshing, and obtaining the vibration response at the internal combustion engine base through a finite element analysis method.

3. The inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency as claimed in claim 2, characterized in that: The transmission loss is expressed as, Among them, d in is the vibration response signal generated by the excitation, is the input signal, d out is the vibration response signal of the support seat, which is the output signal; When TL<0, it is judged that the structure has vibration isolation effect, and when TL≥0, it is judged that the structure has no vibration isolation effect.

4. The inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency as claimed in claim 3, characterized in that: According to the transmission loss TL of the vibration isolator of the internal combustion engine, the rubber body in the middle part of the vibration isolator is optimized, which can be expressed as: Where f(X) is the optimization target, is the transmission loss coefficient of the isolator, X is the density value of the design domain, N is the number of design variables, n is the number of target points within the target frequency range, Ku = ω 2 Mu indicates that the basic dynamic balance must be satisfied during the structural analysis and calculation, K is the stiffness matrix of the structure, u is the displacement matrix of the structure, ω is the circular frequency, and M is the mass matrix.

5. The inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency as claimed in claim 4, characterized in that: The design of the region by using a genetic algorithm includes generating an initialization population P0=20; Conduct finite element analysis of transmission loss on the population's vibration isolators; The results of the finite element analysis of the population were evaluated; Select individuals with better performance and keep them; Perform crossover and mutation on the retained individuals.

6. The inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency as claimed in claim 5, characterized in that: In the optimization of the rubber body in the middle part of the vibration isolator, the optimal result is output. When the individuals are updated by survival of the fittest, the optimal one means that the number of frequency points that meet the constraints reaches the preset standard, that is, the optimal one should be based on the number of constraints. The current iteration step is recorded as i, and its objective function f is saved. i (X).

7. The inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency as claimed in claim 6, characterized in that: The number of constraints satisfied is expressed as, When the number of constraints is met, the optimization model is output as the final result.

8. A system using the inverse optimization design method for an internal combustion engine vibration isolator at a specific frequency as claimed in any one of claims 1 to 7, characterized in that: include: Vibration analysis module, probability judgment module, loss acquisition module and optimization design module; The vibration analysis module is used to obtain the vibration characteristics of the internal combustion engine vibration isolator under typical working conditions through a finite element analysis method; The probability judgment module is used to determine the target frequency of the inverse optimization design of the vibration isolator according to the vibration response; The loss acquisition module is used to establish a finite element model of the vibration isolator of the internal combustion engine, apply loads and constraints, and obtain its transmission loss; The optimization design module is used to design the region using a multilayer structure of a rubber body in the middle part of the vibration isolator as an optimization design domain and minimizing transmission loss as a goal, and adopts a genetic algorithm to design the region.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the inverse optimization design method of the internal combustion engine vibration isolator at a specific frequency according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the inverse optimization design method of an internal combustion engine vibration isolator at a specific frequency according to any one of claims 1 to 7 are implemented.

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