Composite vibration damping mount design and method in manufacturing

Abstract

The present invention provides a composite vibration damping mount design and method in manufacturing. The design method first obtain an energy attenuation rate of a composite vibration damping mount made of stacked fabrics, and a control unit calculates and outputs a layer number data based on a target energy attenuation rate and the energy attenuation rate.. The manufacturing method is to coat an epoxy compound layer on an outer surface of a U-shaped metal substrate, and laminate a first carbon fiber-containing fabric, a vinyl-containing compound layer and a second carbon fiber-containing fabric on the outer surface of the U-shaped metal substrate to form a composite vibration damping mount . The composite vibration damping mount is used to solve the issue of complex and time-consuming engineering caused by adjusting the assembly mechanism of the hull and equipment in order to achieve the purpose of effective vibration isolation of the hull and equipment.

Description

[Technical Field]

[0001] This invention relates to the design and manufacturing method of a composite vibration damping pad, and more particularly to the design and manufacturing method of a composite vibration damping pad applied between the hull and equipment of a ship or submarine. [Previous Technology]

[0002] Vibration damping pads are pads used to reduce vibration and impact. They are usually made of rubber, silicone, foam, metal or special polymer materials. The main function of vibration damping pads is to absorb vibration energy, reduce noise, and reduce the impact force between equipment, the ground or other contact objects. Vibration damping pads are commonly used in industrial machinery, household appliances, sports equipment, transportation vehicles and construction engineering.

[0003] Ships and submarines are strategic weapons, so their positions cannot be easily locked. However, underwater reconnaissance of ships and submarines is mainly carried out through sonar. According to relevant research, if the volume can be reduced by 6 decibels underwater, the distance at which they can be detected by the enemy's passive sonar can be increased by more than double. Therefore, ships and submarines need to pay special attention to the quietness of navigation during navigation.

[0004] In addition, both ships and submarines need to withstand the impact of underwater explosions. According to reference 1 (Lu L, Li X, Zhou J. Study of damage to a high concrete dam subjected to underwater shock waves.), if the medium for transmitting shock waves is water, it will still have enormous destructive power even after long-distance transmission.

[0005] However, the vibrations caused by ships under different loads have a considerable impact on the hull. According to references 2 (Jia W, Chen M, Xie K, et al. Experimental and analytical investigations on vibro-acoustic characteristics of a submerged submarine hull coupled with multiple inner substructures.), 3 (Chang HT, Chen JH, Tseng JG. Vibration of air-coupled transverse bulkheads of a submarine.), and 4 (Chen F, Chen Y, Hua H. Vibration analysis of a submarine elastic propeller-shaft-hull system using FRF-based substructuring method.), Hesse and Rubino et al. proposed different structural improvement methods, attempting to effectively suppress the amplitude by changing the structure. According to the research results, adjusting the assembly mechanism or structural arrangement of the hull and equipment can indeed achieve the purpose of effective vibration isolation, but the mechanism is complex and the engineering is relatively large.

[0006] Therefore, in order to more comprehensively block the transmission of vibration, the present invention makes adjustments to the conventional vibration damping pad structure to change the rigidity and damping of the conventional vibration damping pad, and to more effectively suppress the transmission of vibration of the hull with minimal structural changes.

[0007] In view of the problems of the prior art, the present invention provides a design and manufacturing method of a composite vibration damping pad. The design method first obtains the energy attenuation rate of the composite vibration damping pad made of stacked fabrics of different layers. The control unit then calculates and judges based on the target energy attenuation rate and the energy attenuation rate of the composite vibration damping pad, and outputs the number of fabric layers required to generate the corresponding energy attenuation rate of the composite vibration damping pad. The manufacturing method is to stack a first fabric containing carbon fiber and a second fabric containing carbon fiber on the outer surface of a U-shaped metal substrate to form a composite vibration damping pad. The composite vibration damping pad made by the present invention using this design and manufacturing method is used to solve the problem of complex and time-consuming engineering caused by adjusting the assembly mechanism of the hull and equipment in order to achieve effective vibration isolation of the hull and equipment. [Summary of the Invention]

[0008] One objective of this invention is to provide a design and manufacturing method for a composite vibration damping pad. The design method first obtains the energy attenuation rate of each composite vibration damping pad made by stacking different layers of fabric. When a target energy attenuation rate is input, the control unit determines the number of fabric layers required to generate the composite vibration damping pad with the corresponding energy attenuation rate based on the target energy attenuation rate and the energy attenuation rate of the composite vibration damping pad. The manufacturing method involves coating the outer surface of a U-shaped metal substrate with a compound layer containing epoxy groups, and stacking a first fabric containing carbon fibers and a second fabric containing carbon fibers on the outer surface of the U-shaped metal substrate to form a composite vibration damping pad. The composite vibration damping pad manufactured by this invention using the design and manufacturing method is used to solve the problem of complex and time-consuming engineering caused by adjusting the assembly mechanism of the hull and equipment in order to achieve effective vibration isolation of the hull and equipment.

[0009] In order to achieve the aforementioned objectives and effects, the present invention provides a design and manufacturing method of a composite vibration damping pad. The design method involves obtaining the required number of fabric layers for the composite vibration damping pad corresponding to the energy attenuation rate, thereby determining the number of fabric layers, and then manufacturing the composite vibration damping pad by means of a fabric-based manufacturing method, namely, stacking a first fabric containing carbon fibers and a second fabric containing carbon fibers on the outer surface of a U-shaped metal substrate.

[0010] The design method of the composite vibration damping pad provided by the present invention includes at least the following steps:

[0011] Fabric is placed on the outer surface of one of the U-shaped metal substrates to form a composite vibration damping pad;

[0012] Energy is provided to one end of the composite damping pad to generate an amplitude, and the amplitude is sensed by a measuring unit and transmitted to the control unit;

[0013] The control unit calculates the energy attenuation rate based on the amplitude; and

[0014] When the control unit determines that the energy decay rate is greater than a target energy decay rate, it outputs the number of fabric layers corresponding to the energy decay rate.

[0015] In one embodiment of the present invention, in the step of outputting the number of layers of fabric corresponding to the energy attenuation rate when the control unit determines that the energy attenuation rate is greater than a target energy attenuation rate, the energy attenuation rate is 10% to 80%, the target energy attenuation rate is 1% to 70%, and the number of layers is 1 to 10 layers.

[0016] In one embodiment of the present invention, in the step of placing a fabric on the outer surface of a U-shaped metal substrate to form a composite vibration damping pad, the fabric is woven from carbon fiber bundles and threads containing thermoplastic polymers interlaced together.

[0017] In one embodiment of the present invention, in the step of placing a fabric on the outer surface of a U-shaped metal substrate to form a composite vibration damping pad, the fabric is woven from carbon fiber bundles interlaced with each other.

[0018] The manufacturing method of the composite vibration damping pad provided by the present invention includes at least the following steps:

[0019] Provides U-shaped metal substrates;

[0020] A compound layer containing epoxy groups is coated on the outer surface of a U-shaped metal substrate;

[0021] One side of the first fabric containing carbon fiber is attached to the outer surface of the U-shaped metal substrate;

[0022] A layer of a vinyl compound is coated on the other side of the first fabric containing carbon fibers;

[0023] One side of the second fabric containing carbon fibers is attached to the other side of the first fabric containing carbon fibers; and

[0024] Place it in a high-temperature furnace for heating to produce a composite vibration damping pad;

[0025] Wherein, when energy is provided to one end of the composite vibration damping pad, the composite vibration damping pad generates an amplitude of 43.5 g / N to 48.5 g / N.

[0026] In one embodiment of the present invention, the step of attaching one side of the second carbon fiber-containing fabric to the other side of the first carbon fiber-containing fabric further includes the following steps:

[0027] Repeatedly coat the other side of the second carbon fiber-containing fabric with a vinyl compound layer and attach the second carbon fiber-containing fabric 3 to 10 times.

[0028] In one embodiment of the present invention, in the step of attaching the second carbon fiber-containing fabric to the other side of the first carbon fiber-containing fabric, the first carbon fiber-containing fabric and the second carbon fiber-containing fabric are woven together by interlacing a plurality of carbon fiber bundles and a plurality of threads containing thermoplastic polymers.

[0029] In one embodiment of the present invention, in the step of attaching the second carbon fiber-containing fabric to the other side of the first carbon fiber-containing fabric, the first carbon fiber-containing fabric and the second carbon fiber-containing fabric are woven together by interlacing a plurality of carbon fiber bundles.

[0030] In one embodiment of the present invention, in the step of generating an amplitude when energy is provided to one end of the composite vibration damping pad, one end of the composite vibration damping pad is connected to a sensing unit, and the sensing unit is connected to a control unit. When energy is provided to that end of the composite vibration damping pad, the sensing unit receives a vibration signal and transmits it to the control unit, and the control unit obtains the amplitude based on the vibration signal.

[0031] In one embodiment of the present invention, in the step of generating an amplitude of the composite vibration damping pad when energy is provided to one end of the composite vibration damping pad, the control unit calculates the energy attenuation rate based on the amplitude transmission equation, which is greater than 70%.

Implementation Method

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this application. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of this application.

[0033] The accompanying drawings show schematic diagrams of layer structures according to embodiments of the present application. These drawings are not drawn to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0034] Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without any innovative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0037] According to references 2 (Jia W, Chen M, Xie K, et al. Experimental and analytical investigations on vibro-acoustic characteristics of a submerged submarine hull coupled with multiple inner substructures.), 3 (Chang HT, Chen JH, Tseng JG. Vibration of air-coupled transverse bulkheads of a submarine.), and 4 (Chen F, Chen Y, Hua H. Vibration analysis of a submarine elastic propeller-shaft-hull system using FRF-based substructuring method.), Hesse and Rubino et al. proposed different structural improvement methods, attempting to effectively suppress amplitude by changing the structure. According to the research results, adjusting the assembly mechanism or structural arrangement of the hull and equipment can indeed achieve the purpose of effective vibration isolation, but the engineering is complex and time-consuming.

[0038] In view of the problems of the prior art described above, the present invention provides a design and manufacturing method of a composite vibration damping pad. The design method first obtains the energy attenuation rate of the composite vibration damping pad made of stacked fabrics, and the control unit calculates and outputs the number of layers based on the target energy attenuation rate and the energy attenuation rate. The manufacturing method involves coating the outer surface of a U-shaped metal substrate with a compound layer containing epoxy groups, and stacking a first fabric containing carbon fibers and a second fabric containing carbon fibers on the outer surface of the U-shaped metal substrate to form a composite vibration damping pad. The composite vibration damping pad made by the present invention using this design and manufacturing method is used to solve the problem of the complexity and time-consuming engineering caused by the need to adjust the assembly mechanism of the hull and equipment to effectively suppress the amplitude in order to achieve effective vibration isolation of the hull and equipment.

[0039] Please refer to Figure 1A, which is a design flowchart of one embodiment of the present invention. As shown in the figure, this embodiment is the first embodiment, and this embodiment is a design method of a composite vibration damping pad, which includes at least the following steps: Step S10: A fabric is disposed on one outer surface of a U-shaped metal substrate to form a composite vibration damping pad; Step S20: Energy is provided to one end of the composite vibration damping pad to generate an amplitude, and the amplitude is sensed by a sensing unit and transmitted to a control unit; Step S30: The control unit calculates an energy attenuation rate based on the amplitude; and Step S40: When the control unit determines that the energy attenuation rate is greater than a target energy attenuation rate, it outputs the number of layers of the fabric corresponding to the energy attenuation rate.

[0040] Continuing from the above, and referring to Figure 1B, which is a design flowchart of one embodiment of the present invention, as shown in the figure, in step S10 of this embodiment, the U-shaped metal substrate 10 has a substrate amplitude, and the substrate amplitude is provided by the energy P at one end of the U-shaped metal substrate 10, and the substrate amplitude of the U-shaped metal substrate 10 is obtained through the sensing unit 70 and transmitted to the control unit 80.

[0041] Continuing from the above, and referring to Figure 1C, which is a design flowchart of one embodiment of the present invention, as shown in the figure, in step S10 of this embodiment, the fabric 12 is disposed on the outer surface of the U-shaped metal substrate 10 to form the composite vibration damping pads 1, wherein the fabric 12 is disposed in 1 to 10 layers on the outer surface of the U-shaped metal substrate 10 to form the composite vibration damping pads 1.

[0042] Continuing from the above, and referring to Figure 1C, in step S20 of this embodiment, the energy P is provided to one end of the composite vibration damping pad 1, and the amplitude of the composite vibration damping pad 1 is obtained through the sensing unit 70 and transmitted to the control unit 80.

[0043] Continuing from the above, in step S30 of this embodiment, the control unit 80 calculates the energy attenuation rate based on the substrate amplitude and the amplitude, and the energy attenuation rate is 10% to 80%.

[0044] Continuing from the above, in step S40 of this embodiment, the target energy attenuation rate is the user's or designer's requirement for the energy attenuation rate of the composite vibration damping pad 1. For example, when the user or designer requires the energy attenuation rate of the composite vibration damping pad 1 to be 10%, the target energy attenuation rate is 10%.

[0045] Continuing from the above, in step S40 of this embodiment, when the target energy attenuation rate is provided to the control unit 80, the control unit 80 determines that the energy attenuation rate is greater than the target energy attenuation rate and outputs the layer number data of the fabric corresponding to the energy attenuation rate, wherein the target energy attenuation rate is 1% to 70%, and the layer number data is 1 to 10 layers.

[0046] The following description uses a composite vibration damping pad made of a fabric woven from carbon fiber tows and threads containing thermoplastic polymers:

[0047] Please refer to Figure 2A, which is a schematic diagram of a fabric according to one embodiment of the present invention. As shown in the figure, in step S10 of this embodiment, as can be seen from the enlarged surface schematic diagram A, the fabric 12 is woven together by interlacing a plurality of carbon fiber bundles 60 and a plurality of threads 62 containing thermoplastic polymers.

[0048] Continuing from the above, and referring to Figure 2A-1, which is an experimental result diagram of one embodiment of the present invention, as shown in the figure, in step S30 of this embodiment, the control unit 80 calculates the energy attenuation rate of the composite vibration damping pad 1 made of different layers of fabric 12 based on the amplitude of the vibration of the composite vibration damping pad 1 and the amplitude of the substrate, respectively. As can be seen from Figure 2A-1, the composite vibration damping pad 1 made of 1 layer of fabric 12 can generate an energy attenuation rate of 10% to 15% by calculating the amplitude of the vibration of the composite vibration damping pad 1 made of 1 layer of fabric 12 based on the amplitude of the substrate through the control unit 80; the composite vibration damping pad 1 made of 2 layers of fabric 12 can generate an energy attenuation rate of 10% to 15% by calculating the amplitude of the composite vibration damping pad 1 made of 2 layers of fabric 12 based on ... substrate through the calculation of the amplitude of the composite vibration damping pad 1 made of 2 layers of fabric 12. The attenuation rate is 20% to 25%; for the composite vibration damping pad 1 made of 3 layers of the fabric 12 stacked together, the amplitude can be calculated by the control unit 80 and the amplitude of the substrate to produce an energy attenuation rate of 30% to 35%; for the composite vibration damping pad 1 made of 4 layers of the fabric 12 stacked together, the amplitude can be calculated by the control unit 80 and the amplitude of the substrate to produce an energy attenuation rate of 45% to 50%; for the composite vibration damping pad 1 made of 5 layers of the fabric 12 stacked together, the amplitude can be calculated by the control unit 80 and the amplitude of the substrate to produce an energy attenuation rate of 55% to 60%; for the composite vibration damping pad 1 made of 6 layers of the fabric 12 stacked together, the amplitude can be calculated by the control unit 80 and the amplitude of the substrate to produce an energy attenuation rate of 65% to 70%.

[0049] Continuing from the above, and referring to Figure 2A-1, as shown in the figure, in step S40 of this embodiment, when the designer expects the energy attenuation rate of the composite damping pad 1 to be at least 50%, and the fabric 12 used in the composite damping pad 1 is woven from a plurality of carbon fiber bundles 60 and a plurality of wires 62 containing thermoplastic polymers, the user or designer inputs the target energy attenuation rate of 50% into the control unit 80. The control unit 80 determines that the composite damping pad 1 corresponding to the target energy attenuation rate is made of 5 layers of fabric 12 and 6 layers of fabric 12, and outputs the layer number data as 5 layers and 6 layers. Based on this layer number data, the user or designer can know that the expected energy attenuation rate of the composite damping pad 1 is at least 50%, and the fabric 12 of the composite damping pad 1 needs to be stacked in 5 or 6 layers.

[0050] However, the energy attenuation rate varies among different fabrics. Therefore, the following explanation uses a composite vibration damping pad made of a fabric woven from interlaced carbon fiber bundles as an example:

[0051] Please refer to Figure 2B, which is a schematic diagram of a fabric according to one embodiment of the present invention. As shown in the figure, in step S10 of this embodiment, as can be seen from the enlarged surface schematic diagram A, the fabric 12 is woven from a plurality of carbon fiber bundles 60 interlaced with each other.

[0052] Continuing from the above, and referring to Figure 2B-1, which is an experimental result diagram of one embodiment of the present invention, as shown in the figure, in step S30 of this embodiment, the control unit 80 calculates the energy attenuation rate of the composite vibration damping pad 1 made of different layers of fabric 12 based on the amplitude of the vibration of the composite vibration damping pad 1 and the amplitude of the substrate, respectively. As can be seen from Figure 2B-1, the composite vibration damping pad 1 made of 1 layer of fabric 12 can generate an energy attenuation rate of 15% to 20% by calculating the amplitude of the vibration of the composite vibration damping pad 1 made of 1 layer of fabric 12 based on the amplitude of the substrate through the control unit 80; the composite vibration damping pad 1 made of 2 layers of fabric 12 can generate an energy attenuation rate of 15% to 20% by calculating the amplitude of the composite vibration damping pad 1 made of 2 layers of fabric 12 based on the amplitude of the composite vibration damping pad 1 made of 2 layers of fabric 12 based on the amplitude of the composite vibration damping pad 1 made of 2 layers of fabric 12 based on the amplitude of the composite vibration damping pad 1 made of 2 layers of fabric 12 based on the amplitude of the composite vibration damping pad 1 made of 2 layers of fabric 12 based on the amplitude of the substrate through the calculation of the amplitude of the composite vibration damping pad 1 made of 1 layer of fabric 12. The attenuation rate is 25% to 30%; for the composite vibration damping pad 1 made of 3 layers of the fabric 12 stacked together, the amplitude can be calculated by the control unit 80 and the amplitude of the substrate to produce an energy attenuation rate of 45% to 50%; for the composite vibration damping pad 1 made of 4 layers of the fabric 12 stacked together, the amplitude can be calculated by the control unit 80 and the amplitude of the substrate to produce an energy attenuation rate of 55% to 60%; for the composite vibration damping pad 1 made of 5 layers of the fabric 12 stacked together, the amplitude can be calculated by the control unit 80 and the amplitude of the substrate to produce an energy attenuation rate of 65% to 70%; for the composite vibration damping pad 1 made of 6 layers of the fabric 12 stacked together, the amplitude can be calculated by the control unit 80 and the amplitude of the substrate to produce an energy attenuation rate of 75% to 80%.

[0053] Continuing from the above, and referring to Figure 2B-1, as shown, in step S40 of this embodiment, when the designer expects the energy attenuation rate of the composite damping pad 1 to be at least 50%, and the fabric 12 used in the composite damping pad 1 is woven from a plurality of carbon fiber bundles 60 interlaced, the user or designer inputs the target energy attenuation rate of 50% into the control unit 80. The control unit 80 determines that the composite damping pad 1 has an energy attenuation rate greater than the target energy attenuation rate. The composite vibration damping pad 1 is made of 4 layers of fabric 12 stacked together, 5 layers of fabric 12 stacked together, and 6 layers of fabric 12 stacked together. The output layer number data is 4 layers, 5 layers, and 6 layers. Based on the layer number data, the user or designer can know that the expected energy attenuation rate of the composite vibration damping pad 1 is at least 50%, and the fabric 12 of the composite vibration damping pad needs to be stacked in 4, 5, or 6 layers.

[0054] Continuing from the above, the design method of the composite vibration damping pad provided by the present invention can obtain the energy attenuation rate of each composite vibration damping pad 1 made of stacked fabrics 12 of different layers through the sensing unit 70 and the control unit 80. The user or designer can input the target energy attenuation rate to the control unit 80 according to the design requirements. The control unit 80 outputs the number of layers of fabric 12 corresponding to each composite vibration damping pad 1 that meets the target energy attenuation rate based on the target energy attenuation rate and the individual energy attenuation rate of each composite vibration damping pad 1, so that the designer or user can quickly select the required number of layers of fabric of the composite vibration damping pad corresponding to the target energy attenuation rate.

[0055] However, after enabling designers or users to quickly select the required number of layers of fabric for the composite damping pad corresponding to the target energy attenuation rate, the present invention also provides a method for manufacturing a composite damping pad based on the fabric of these layers. The method for manufacturing the composite damping pad is described below:

[0056] Please refer to Figure 3A, which is a manufacturing flow diagram of one embodiment of the present invention. As shown in the figure, this embodiment is a first embodiment, and this embodiment is a method for manufacturing a composite vibration damping pad, which includes at least the following steps: Step S100: providing a U-shaped metal substrate; Step S200: coating an epoxy-containing compound layer on one outer surface of the U-shaped metal substrate; Step S300: attaching one side of a first carbon fiber-containing fabric to the outer surface of the U-shaped metal substrate; Step S400: coating the other side of the first carbon fiber-containing fabric with a vinyl-containing compound layer; Step S500: attaching one side of a second carbon fiber-containing fabric to the other side of the first carbon fiber-containing fabric; and Step S600: placing it in a high-temperature furnace for heating to form a composite vibration damping pad.

[0057] Continuing from the above, and referring to Figures 3B and 3C, Figure 3B is a structural schematic diagram of one embodiment of the present invention, and Figure 3C is a partially enlarged view of Figure 3B of one embodiment of the present invention. As shown in the figures, in this embodiment, when an energy P is provided to one end of the composite vibration damping pad, the composite vibration damping pad generates an amplitude, which is between 43.5 g / N and 48.5 g / N.

[0058] Continuing from the above, in step S100 of this embodiment, the U-shaped metal substrate 10 is made of cast steel with a density of 7.5 to 7.81 and a Young's coefficient of 150 GPa to 210 GPa.

[0059] Continuing from the above, in step S200 of this embodiment, the outer surface of the U-shaped metal substrate 10 is coated with the epoxy-containing compound layer 15.

[0060] Continuing from the above, as shown in the figure, in step S200 of this embodiment, the epoxy-containing compound layer 15 is used to attach the first carbon fiber-containing fabric 40 to the outer surface of the U-shaped metal substrate 10.

[0061] Continuing from the above, as shown in the figure, in steps S400 and S500 of this embodiment, the other side of the first fabric 40 containing carbon fibers is coated with the vinyl compound layer 45, and the second fabric 50 containing carbon fibers is correspondingly attached to the other side of the first fabric 40 containing carbon fibers by means of the vinyl compound layer 45.

[0062] Continuing from the above, in steps S400 and S500 of this embodiment, the second carbon fiber-containing fabric 50 is laminated on the other side of the first carbon fiber-containing fabric 40 to form a carbon fiber reinforced polymer, and the vinyl compound layer 45 serves as the matrix of the carbon fiber reinforced polymer. Continuing from the above, in step S100 of this embodiment, a metal powder is impacted onto the outer surface of the U-shaped metal substrate 10 by a high-pressure gas to remove the oxide layer on the outer surface of the U-shaped metal substrate 10. By removing the oxide layer on the outer surface of the U-shaped metal substrate, the first carbon fiber-containing fabric 40 can be effectively bonded to the outer surface of the U-shaped metal substrate 10 by the epoxy compound layer. The metal powder is made of silicon carbide.

[0063] Continuing from the above, and referring to Figures 4A and 4B, Figures 4A and 4B are a lamination flowchart of one embodiment of the present invention. As shown in the figure, step S500 of this embodiment further includes the following steps: Step S520: Repeatedly apply a vinyl compound layer to the other side of the second carbon fiber-containing fabric and attach the second carbon fiber-containing fabric 3 to 10 times.

[0064] Continuing from the above, in step S520 of this embodiment, the compound layer 45 containing vinyl is repeatedly coated on the other side of the second fabric 50 containing carbon fiber and the second fabric 50 containing carbon fiber is attached in order to improve its energy decay rate.

[0065] Continuing from the above, and referring to Figure 5, which is a top view of Figure 3B of one embodiment of the present invention, as shown in the figure, in step S500 of this embodiment, as can be seen from a magnified view A, the first fabric 40 containing carbon fibers and the second fabric 50 containing carbon fibers are woven together by interlacing a plurality of carbon fiber bundles 60 and a plurality of wires 62 containing thermoplastic polymers.

[0066] Continuing from the above, in this embodiment, in order to verify the damping effect of the composite vibration damping pad 100 made of the first carbon fiber fabric 40 and the second carbon fiber fabric 50, which are woven together by interlacing the carbon fiber tows 60 and the thermoplastic polymer-containing wires 62, the present invention uses an experimental method with a fixed boundary and a free boundary to verify the effect.

[0067] The experimental method for this fixed boundary is described below:

[0068] Continuing from the above, and referring to Figure 6A, which is an experimental flowchart of one embodiment of the present invention, as shown in the figure, in this embodiment, the U-shaped metal substrate 10 is a conventional damping pad. Therefore, in order to measure the damping effect of the conventional damping pad, the present invention also provides the energy P at one end of the U-shaped metal substrate 10 to conduct a knocking test, thereby obtaining the substrate amplitude SS of the U-shaped metal substrate 10.

[0069] Continuing from the above, and referring to Figure 6B, which is an experimental flowchart of one embodiment of the present invention, as shown in the figure, in this embodiment, by providing the energy P to one end of the composite vibration damping pad 100 for a knocking test, one end of the composite vibration damping pad 100 generates an amplitude UD after being knocked, wherein the combination of the vinyl compound layer 45 and the second carbon fiber fabric 50 consists of 5 to 7 layers.

[0070] Continuing from the above, and referring again to Figure 6A, as shown in the figure, in this embodiment, by connecting a sensing unit 70 to one end of the U-shaped metal substrate 10, when the energy P is provided for the impact test, the end of the U-shaped metal substrate 10 generates a substrate vibration signal. At the same time, since the sensing unit 70 is connected to a control unit 80, the sensing unit 70 transmits the substrate vibration signal to the control unit 80, and the control unit 80 generates the substrate vibration signal according to the substrate amplitude SS.

[0071] Continuing from the above, and referring again to Figure 6B, as shown in the figure, in this embodiment, by connecting the end of the composite damping pad 100 to a sensing unit 70, when the energy P is provided for the impact test, the end of the composite damping pad 100 generates a vibration signal. At the same time, since the sensing unit 70 is connected to a control unit 80, the sensing unit 70 transmits the vibration signal to the control unit 80, and the control unit 80 generates the vibration signal according to the amplitude UD.

[0072] Continuing from the above, and referring to Figure 6C, which is an experimental flowchart of one embodiment of the present invention, as shown in the figure, in this embodiment, the control unit 80 uses MATLAB software to convert the substrate vibration signal and the vibration signal into a frequency response diagram, wherein the conversion is carried out by Fourier transform to convert the time domain signal into a frequency domain diagram.

[0073] Continuing from the above, as shown in the figure, in this embodiment, the peak amplitude of the substrate amplitude SS is 49.54 g / N (dB) and the amplitude UD is 43.73 g / N (dB) according to the frequency response diagram.

[0074] Continuing from the above, in this embodiment, the control unit 80 calculates an energy attenuation rate of 73.8% based on the substrate amplitude SS and the amplitude UD using formula (a).

[0075] Formula (1):

[0076]

[0077] The experimental method for this free boundary is described below:

[0078] Continuing from the above, and referring to Figure 7A, which is an experimental flowchart of one embodiment of the present invention, as shown in the figure, in this embodiment, the U-shaped metal substrate 10 is a conventional damping pad. Therefore, in order to measure the damping effect of the conventional damping pad, the present invention provides the energy P at one end of the U-shaped metal substrate 10 and the other end of the U-shaped metal substrate 10 mirror to perform a knocking test, thereby obtaining the substrate amplitude SS of the U-shaped metal substrate 10.

[0079] Continuing from the above, and referring to Figure 7B, which is an experimental flowchart of one embodiment of the present invention, as shown in the figure, in this embodiment, by providing the energy P to one end of the composite vibration damping pad 100 and the other end of the composite vibration damping pad 100 mirrored, a knocking test is performed, and the amplitude UD is generated after knocking, wherein the combination of the vinyl compound layer 45 and the second carbon fiber fabric 50 is 5 to 7 layers.

[0080] Continuing from the above, and referring again to Figure 7A, as shown in the figure, in this embodiment, by connecting the end of the U-shaped metal substrate 10 to the sensing unit 70, when the energy P is provided to perform the impact test, the end of the U-shaped metal substrate 10 generates the substrate vibration signal. At the same time, since the sensing unit 70 is connected to the control unit 80, the sensing unit 70 transmits the substrate vibration signal to the control unit 80, and the control unit 80 generates the substrate vibration signal accordingly based on the substrate amplitude SS.

[0081] Continuing from the above, and referring again to Figure 7B, as shown in the figure, in this embodiment, by connecting the end of the composite damping pad 100 to the sensing unit 70, when the energy P is provided for the impact test, the end of the composite damping pad 100 generates the vibration signal. At the same time, since the sensing unit 70 is connected to the control unit 80, the sensing unit 70 transmits the vibration signal to the control unit 80, and the control unit 80 generates the vibration signal according to the amplitude UD.

[0082] Continuing from the above, and referring to Figure 7C, which is an experimental flowchart of one embodiment of the present invention, as shown in the figure, in this embodiment, the control unit 80 uses MATLAB software to convert the substrate vibration signal and the vibration signal into a frequency response diagram, wherein the conversion is carried out by Fourier transform to convert the time domain signal into a frequency domain diagram.

[0083] Continuing from the above, as shown in the figure, in this embodiment, the peak amplitude of the substrate amplitude SS is 60.34 g / N (dB) and the amplitude UD is 47.783 g / N (dB) according to the frequency response diagram.

[0084] Continuing from the above, in this embodiment, the control unit 80 calculates an energy attenuation rate of 94.8% based on the substrate amplitude SS and the amplitude UD using formula (ii).

[0085] Formula (II):

[0086]

[0087] Continuing from the above, in this embodiment, it can be seen from the above-mentioned experimental methods of the fixed boundary and the free boundary that the composite vibration damping pad 100 made of the first carbon fiber fabric 40 and the second carbon fiber fabric 50, which are made by interlacing the carbon fiber tows 60 and the thermoplastic polymer wires 62, has a lower damping performance with a lower peak amplitude when subjected to the same external force compared to conventional vibration damping pads. At the same time, it can be seen from the peak amplitude and the above-mentioned equation that the energy attenuation rate of the composite vibration damping pad 100 is greater than 70% compared to conventional vibration damping pads.

[0088] However, in the manufacturing method of the composite vibration damping pad provided by the present invention, a composite vibration damping pad made of a first fabric containing carbon fiber and a second fabric containing carbon fiber, which are woven only from carbon fiber tows, is further provided. This composite vibration damping pad will be described below:

[0089] Continuing from the above, and referring to Figure 8, which is a top view of Figure 3B of another embodiment of the present invention, as shown in the figure, this embodiment is the second embodiment. In step S500 of this embodiment, as can be seen from a magnified surface diagram A', the first fabric 40' containing carbon fibers and the second fabric 50' containing carbon fibers are woven together by interlacing multiple carbon fiber bundles 60.

[0090] Continuing from the above, in this embodiment, in order to verify the damping effect of the composite vibration damping pad 100' made of the first carbon fiber-containing fabric 40' and the second carbon fiber-containing fabric 50' woven together by the carbon fiber bundles 60', the present invention uses an experimental method with a fixed boundary and a free boundary to verify the effect.

[0091] The experimental method for this fixed boundary is described below:

[0092] Continuing from the above, and referring to Figure 9A, which is an experimental flowchart of another embodiment of the present invention, as shown in the figure, in this embodiment, the U-shaped metal substrate 10' is a conventional damping pad. Therefore, in order to measure the damping effect of the conventional damping pad, the present invention also provides the energy P' at one end of the U-shaped metal substrate 10' to conduct a knocking test, thereby obtaining the substrate amplitude SS of the U-shaped metal substrate 10'.

[0093] Continuing from the above, and referring to Figure 9B, which is an experimental flowchart of another embodiment of the present invention, as shown in the figure, in this embodiment, by providing the energy P' to one end of the composite damping pad 100' for a knocking test, one end of the composite damping pad 100' generates an amplitude LT after being knocked, wherein the combination of the vinyl compound layer 45' and the second fabric 50' containing carbon fiber consists of 5 to 7 layers.

[0094] Continuing from the above, and referring again to Figure 9A, as shown in the figure, in this embodiment, by connecting a sensing unit 70' to one end of the U-shaped metal substrate 10', when the energy P' is provided to perform a knocking test, the end of the U-shaped metal substrate 10' generates a substrate vibration signal. At the same time, since the sensing unit 70' is connected to a control unit 80', the sensing unit 70' transmits the substrate vibration signal to the control unit 80', and the control unit 80' generates the substrate amplitude SS according to the substrate vibration signal.

[0095] Continuing from the above, and referring again to Figure 9B, as shown in the figure, in this embodiment, by connecting the end of the composite damping pad 100' to the sensing unit 70', when the energy P' is provided for the impact test, the end of the composite damping pad 100' generates a vibration signal. At the same time, since the sensing unit 70' is connected to a control unit 80', the sensing unit 70' transmits the vibration signal to the control unit 80', and the control unit 80' generates the amplitude LT according to the vibration signal.

[0096] Continuing from the above, and referring to Figure 9C, which is an experimental flowchart of another embodiment of the present invention, as shown in the figure, in this embodiment, the control unit 80' uses MATLAB software to convert the substrate vibration signal and the vibration signal into a frequency response diagram, wherein the conversion is performed by converting the time domain signal into a frequency domain diagram through Fourier transform.

[0097] Continuing from the above, as shown in the figure, in this embodiment, the peak amplitude of the substrate amplitude SS is 49.54 g / N (dB) and the amplitude LT is 44.12 g / N (dB) according to the frequency response diagram.

[0098] Continuing from the above, in this embodiment, the control unit 80' calculates an energy attenuation rate of 71.3% based on the substrate amplitude SS and the amplitude LT using formula (iii).

[0099] Formula (III):

[0100]

[0101] The experimental method for this free boundary is described below:

[0102] Continuing from the above, and referring to Figure 10A, which is an experimental flowchart of another embodiment of the present invention, as shown in the figure, in this embodiment, the U-shaped metal substrate 10' is a conventional damping pad. Therefore, in order to measure the damping effect of the conventional damping pad, the present invention provides the energy P' at one end of the U-shaped metal substrate 10' and the other end of the U-shaped metal substrate 10' mirror image of that end to conduct a knocking test, thereby obtaining the substrate amplitude SS of the U-shaped metal substrate 10'.

[0103] Continuing from the above, and referring to Figure 10B, which is an experimental flowchart of another embodiment of the present invention, as shown in the figure, in this embodiment, by providing the energy P' to one end of the composite damping pad 100' and the other end of the composite damping pad 100' mirror image of that end, a knocking test is performed, and the amplitude LT is generated after knocking, wherein the combination of the vinyl compound layer 45' and the second fabric 50' containing carbon fiber is 5 to 7 layers.

[0104] Continuing from the above, and referring again to Figure 10A, as shown in the figure, in this embodiment, by connecting the end of the U-shaped metal substrate 10' to the sensing unit 70', when the energy P' is provided to perform the impact test, the end of the U-shaped metal substrate 10' generates the substrate vibration signal. At the same time, since the sensing unit 70' is connected to the control unit 80', the sensing unit 70' transmits the substrate vibration signal to the control unit 80', and the control unit 80' generates the substrate amplitude SS according to the substrate vibration signal.

[0105] Continuing from the above, and referring again to Figure 10B, as shown in the figure, in this embodiment, by connecting the end of the composite damping pad 100' to the sensing unit 70', when the energy P' is provided for the impact test, the end of the composite damping pad 100' generates the vibration signal. At the same time, since the sensing unit 70' is connected to the control unit 80', the sensing unit 70' transmits the vibration signal to the control unit 80', and the control unit 80' generates the amplitude LT accordingly based on the vibration signal.

[0106] Continuing from the above, and referring to Figure 10C, which is an experimental flowchart of another embodiment of the present invention, as shown in the figure, in this embodiment, the control unit 80' uses MATLAB software to convert the substrate vibration signal and the vibration signal into a frequency response diagram, wherein the conversion is performed by converting the time domain signal into a frequency domain diagram through Fourier transform.

[0107] Continuing from the above, as shown in the figure, in this embodiment, the peak amplitude of the substrate amplitude SS is 60.34 g / N (dB) and the amplitude LT is 48.372 g / N (dB) according to the frequency response diagram.

[0108] Continuing from the above, in this embodiment, the control unit 80' calculates an energy attenuation rate of 93.7% based on the substrate amplitude SS and the amplitude LT using formula (iv).

[0109] Formula (IV):

[0110]

[0111] Continuing from the above, in this embodiment, it can be seen from the above-mentioned experimental methods of the fixed boundary and the free boundary that the composite vibration damping pad 100' made of the first carbon fiber-containing fabric 40' and the second carbon fiber-containing fabric 50' woven together by the carbon fiber bundles 60' of the present invention has a lower damping performance of peak amplitude when subjected to the same external force compared with conventional vibration damping pads. At the same time, it can be seen from the peak amplitude and the above-mentioned equation that the energy attenuation rate of the composite vibration damping pad 100' is greater than 70% compared with conventional vibration damping pads.

[0112] Continuing from the above, in order to more clearly illustrate the damping effect of the composite vibration damping pad produced by the manufacturing method of the composite vibration damping pad provided by the present invention, the experimental results of the free boundary and the fixed boundary of the composite vibration damping pad 100 made of the first carbon fiber-containing fabric 40 and the second carbon fiber-containing fabric 50, which are made by interlacing a plurality of carbon fiber filaments 60 and a plurality of thermoplastic polymer-containing threads 62, and the composite vibration damping pad 100' made by interlacing the first carbon fiber-containing fabric 40' and the second carbon fiber-containing fabric 50', are presented in the following table: Free boundary Fixed boundary Peak amplitude Energy decay rate Peak amplitude Energy decay rate Substrate amplitude SS 60.34 g / N 49.54 g / N amplitude UD 47.783 g / N 94.8% 43.73 g / N 73.8% LT 48.372 g / N 93.7% 44.12 g / N 71.3%

[0113] Continuing from the above, as can be seen from the table above, in the first embodiment, the first carbon fiber-containing fabric 40 and the second carbon fiber-containing fabric 50 are composite vibration damping pads 100 woven together by interlacing a plurality of carbon fiber filaments 60 and a plurality of thermoplastic polymer-containing threads 62; and in the second embodiment, the composite vibration damping pad 100' made of the first carbon fiber-containing fabric 40' and the second carbon fiber-containing fabric 50' woven together by interlacing the carbon fiber filaments 60' has an amplitude (UD and In terms of amplitude peak value comparison, whether using the free boundary test method or the fixed boundary test method, the amplitude SS of the substrate of the conventional vibration damping pad is lower. At the same time, in terms of energy attenuation rate, it can be seen that the composite vibration damping pad manufactured by the manufacturing method of the present invention can achieve an energy attenuation of more than 70% compared with the conventional vibration damping pad. It is worth mentioning that, under the free boundary test method, the composite vibration damping pad manufactured by the manufacturing method of the present invention can achieve an energy attenuation of more than 90% compared with the conventional vibration damping pad.

[0114] In summary, the present invention provides a design and manufacturing method of a composite vibration damping pad. The design method involves first obtaining a first amplitude of a first vibration damping pad made of a first fabric. When the first amplitude is greater than a target amplitude, a second fabric with a second natural frequency is selected to replace the first fabric to form a second vibration damping pad. The reason for selecting the second fabric to replace the first fabric is that the second natural frequency of the second fabric is greater than the first natural frequency of the first fabric. The manufacturing method involves coating the outer surface of a U-shaped metal substrate with a compound layer containing epoxy groups, and then stacking a first fabric containing carbon fibers and a second fabric containing carbon fibers on the outer surface of the U-shaped metal substrate to form a composite vibration damping pad. The first fabric containing carbon fibers and the second fabric containing carbon fibers... The two fabrics containing carbon fibers have a layer of vinyl compounds between them. The present invention determines the selection of the second fabric through the provided design method, and then manufactures a composite vibration damping pad through the manufacturing method based on the second fabric. As can be seen from the above manufacturing method, the composite vibration damping pad provided by the present invention is an improvement on the conventional vibration damping pad. At the same time, according to experimental results, it is confirmed that the composite vibration damping pad made by the design and manufacturing method of the present invention is superior to the conventional vibration damping pad in terms of damping effect. Therefore, the design and manufacturing method of the composite vibration damping pad provided by the present invention solves the problem of complex and time-consuming engineering caused by the need to adjust the assembly mechanism of the hull and equipment in order to achieve effective vibration isolation of the hull and equipment.

[0115] Therefore, this invention is indeed novel, inventive and industrially usable, and should undoubtedly meet the requirements for patent application under the Patent Law of our country. Therefore, we have filed a patent application in accordance with the law and pray that the Bureau will grant the patent as soon as possible. We are deeply grateful for your prayers.

[0116] However, the above description is only one embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, all equivalent changes and modifications made to the shape, structure, features and spirit described in the claims of the present invention should be included in the scope of the claims of the present invention. [Simplified Explanation of the Diagram]

[0117] Figures 1A to 1C: These are design flowcharts of one embodiment of the present invention; Figure 2A: This is a schematic diagram of a fabric of one embodiment of the present invention; Figure 2A-1: This is an experimental result diagram of one embodiment of the present invention; Figure 2B: This is a schematic diagram of a fabric of one embodiment of the present invention; Figure 2B-1: This is an experimental result diagram of one embodiment of the present invention; Figure 3A: This is a manufacturing flowchart of one embodiment of the present invention; Figure 3B: This is a structural schematic diagram of one embodiment of the present invention; Figure 3C: This is a partial enlarged view of Figure 3B of one embodiment of the present invention; Figures 4A to 4B: These are lamination flowcharts of one embodiment of the present invention; Figure 5: This is a schematic diagram of a first fabric containing carbon fibers and a second fabric containing carbon fibers of one embodiment of the present invention; Figures 6A to 6C: These are top views of Figure 3B of one embodiment of the present invention; Figures 7A to 7C: These are experimental flowcharts of one embodiment of the present invention; Figure 8: This is a top view of Figure 3B of another embodiment of the present invention; Figures 9A to 9C: These are experimental flowcharts of another embodiment of the present invention; and Figures 10A to 10C: These are experimental flowcharts of another embodiment of the present invention.

Claims

1. A design method for a composite vibration damping pad, comprising at least the following steps: disposing a fabric on the outer surface of a U-shaped metal substrate to form a composite vibration damping pad; providing energy to one end of the composite vibration damping pad to generate an amplitude, and sensing the amplitude by a sensing unit and transmitting it to a control unit; the control unit calculating an energy attenuation rate based on the amplitude; and when the control unit determines that the energy attenuation rate is greater than a target energy attenuation rate, outputting data on the number of layers of the fabric corresponding to the energy attenuation rate.

2. The design method as described in claim 1, wherein in the step of the control unit outputting the number of layers of the fabric corresponding to the energy attenuation rate when the control unit determines that the energy attenuation rate is greater than a target energy attenuation rate, the energy attenuation rate is 10% to 80%, the target energy attenuation rate is 1% to 70%, and the number of layers is 1 to 10 layers.

3. The design method as described in claim 1, wherein in the step of placing a fabric on the outer surface of a U-shaped metal substrate to form a composite vibration damping pad, the fabric is formed by interlacing a plurality of carbon fiber bundles and a plurality of threads containing thermoplastic polymers.

4. The design method as described in claim 1, wherein in the step of placing a fabric on one of the outer surfaces of a U-shaped metal substrate to form a composite vibration damping pad, the fabric is woven from a plurality of carbon fiber bundles interlaced with each other.

5. A method for manufacturing a composite vibration damping pad, comprising at least the following steps: providing a U-shaped metal substrate; coating an epoxy-containing compound layer on one outer surface of the U-shaped metal substrate; attaching one side of a first carbon fiber-containing fabric to the outer surface of the U-shaped metal substrate; coating the other side of the first carbon fiber-containing fabric with a vinyl-containing compound layer; attaching one side of a second carbon fiber-containing fabric to the other side of the first carbon fiber-containing fabric; and placing it in a high-temperature furnace for heating to form a composite vibration damping pad; wherein, When energy is applied to one end of the composite vibration damping pad, the composite vibration damping pad generates an amplitude ranging from 43.5 g / N to 48.5 g / N.

6. The manufacturing method as claimed in claim 5, wherein the step of attaching a second carbon fiber-containing fabric to the other side of the first carbon fiber-containing fabric further comprises the following steps: repeatedly applying the vinyl compound layer to the other side of the second carbon fiber-containing fabric and attaching the second carbon fiber-containing fabric 3 to 10 times.

7. The manufacturing method as claimed in claim 5, wherein in the step of attaching a second carbon fiber-containing fabric to the other side of the first carbon fiber-containing fabric, the first carbon fiber-containing fabric and the second carbon fiber-containing fabric are woven together by interlacing a plurality of carbon fiber bundles and a plurality of thermoplastic polymer-containing threads.

8. The manufacturing method as claimed in claim 5, wherein in the step of attaching a second carbon fiber-containing fabric to the other side of the first carbon fiber-containing fabric, the first carbon fiber-containing fabric and the second carbon fiber-containing fabric are woven from a plurality of carbon fiber bundles interlaced with each other.

9. The manufacturing method as claimed in claim 5, wherein in the step of generating an amplitude when energy is provided to one end of the composite vibration damping pad, the end of the composite vibration damping pad is connected to a sensing unit, the sensing unit is connected to a control unit, and when the energy is provided to the end of the composite vibration damping pad, the sensing unit receives a vibration signal and transmits it to the control unit, and the control unit generates the amplitude based on the vibration signal.

10. The manufacturing method as claimed in claim 9, wherein in the step of the composite damping pad generating an amplitude when energy is provided to one end of the composite damping pad, the control unit calculates an energy attenuation rate based on the amplitude through an equation, the energy attenuation rate being greater than 70%.

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