Text/Da Zhuang
Editor/Da Zhuang
"Vibration response of elastic disc under piezoelectric disk excitation" refers to the vibration of elastic disk under the action of external force under the action of piezoelectric disk. A piezoelectric disc can be deformed by applying an electric field, which in turn generates mechanical energy, which is transferred to the elastic disc to produce a vibration response.
The vibration response of an elastic disk is related to parameters such as frequency and amplitude of piezoelectric disk excitation. This technology is commonly used to manufacture various electroacoustic devices, such as piezoelectric oscillators and loudspeakers, in communications, audio, and acoustics.
Under piezoelectric disk excitation, the vibration response of an elastic disk can be determined by measuring the electrical signal on the disk. When an electric field is applied to a piezoelectric disk, deformation occurs on the surface of the piezoelectric material, and due to the piezoelectric effect of the material, the piezoelectric material produces an electric charge distribution, forming an electric field, the strength of which is proportional to the magnitude and direction of the applied electric field.
Therefore, when the piezoelectric disk is deformed, the charge distribution changes, resulting in fluctuations in the electrical signal on the circuit, which can be detected and recorded.
Using this technology, the vibration mode analysis, resonant frequency determination, and frequency response characteristic analysis of elastic discs under piezoelectric disk excitation can be realized. This technique is not only suitable for discs with simple shapes, but also for structures with complex shapes, such as bending, twisting, etc. At the same time, it is also possible to adjust the excitation parameters of the piezoelectric disc by changing the size and shape of the piezoelectric disc to achieve vibration response in different frequency ranges, which has a wide range of application prospects.
In short, "vibration response of elastic disc under piezoelectric disk excitation" is an important technology, which can be used to realize the vibration response analysis and detection of various structures, and provide an important basis for achieving structural strength and acoustic optimization.
In addition, this technology can also be applied to the biomedical field, measuring and analyzing the vibration response and bioelectric signals of biological tissues and organs, and realizing the monitoring and diagnosis of physiological activities. For example, by contacting piezoelectric probes with biological tissues, electrophysiological signals and mechanical vibration responses of tissues such as the heart, muscles, and nerves can be measured, and various physiological events such as heart contraction, muscle activity, etc. can be analyzed based on vibration signatures.
In addition, piezoelectric disc technology can also be applied to the manufacture of sound energy conversion devices, such as piezoelectric oscillators and loudspeakers. Piezoelectric discs are used to generate mechanical vibrations, which in turn drive air vibrations in the resonance chamber and generate sound waves. This technology not only has the advantages of efficient energy conversion, linear and stable frequency response, but also can achieve the characteristics of small size, light weight and fast response speed, and is widely used in aviation, automotive, communications, audio and consumer electronics and other fields.
In short, the technology of "vibration response of elastic disc under piezoelectric disk excitation" is widely used and is an important technology for manufacturing electroacoustic devices, conducting biomedical research and realizing structural vibration response analysis.
First, the structural damage detection study of the vibration response of elastic disk under piezoelectric disk excitation
With the development of aviation, aerospace, transportation and other fields, structural safety has become one of the important issues that people pay attention to. For structural damage detection, the traditional method is mainly based on sensors to monitor the structure in real time.
However, the drawback of this method is that it cannot detect damage in time at the early stage of structural damage. In recent years, some studies have shown that the vibration response of elastic discs based on piezoelectric disc excitation can detect damage in the early stage of structural damage, which has become a new detection method.
In this study, we first established a piezoelectric disk excitation system fixed on an elastic disk, which generated a mechanical waveform of a certain frequency and amplitude to cause stress and vibration in the measured structure, and then measured the dynamic response signal of the structure using an accelerometer. We divide structural damage into two cases: cell damage and plate damage.
We inject transverse and longitudinally symmetrical elements into small holes at different locations, or cut plate damage in a uniform area, and then use this method for damage detection.
In the test, we measured the vibration response of the elastic disk at different damage locations and degrees, and analyzed the amplitude and frequency. We found that when the damage area is less than 1% of the overall area of the structure, this method is more sensitive and can effectively detect damage.
In addition, the higher the detection accuracy when the damage location is closer to the piezoelectric disk. We also evaluated the effectiveness of this method at different levels of impairment and compared it to conventional monitoring methods.
The above results show that the vibration response of elastic discs under piezoelectric disk excitation can effectively detect structural damage. This method has low application cost and can find problems in time when the structure is damaged, which will provide a new idea and means for structural safety monitoring in the engineering field.
Second, the vibration mode analysis of elastic disc under piezoelectric disk excitation and its application to structural optimization design
With the continuous development and progress of engineering disciplines, structural optimization design has brought great effects in achieving energy saving and emission reduction, reducing vibration and noise, and improving structural strength and stability. As a new method, the vibration mode analysis of elastic discs under piezoelectric disk excitation has important application value for structural optimization design.
In this study, we analyze the vibration mode of the structure by studying the vibration response signal of the elastic disk under the excitation of the piezoelectric disk. First, we built an elastic disc-piezoelectric disc excitation system to excite the elastic disk, measure its vibration response signal, and process and analyze the signal. By analyzing the vibration frequency and vibration mode, we obtain the flexibility matrix and stiffness matrix of the elastic disk, and solve its vibration characteristics and vibration mode.
In our research, we found multiple vibration modalities, analyzed and described them. We compared the amplitude in different modes and found significant differences in amplitude in different modes. Therefore, in the optimization of structural design, it is necessary to select the appropriate vibration mode according to the actual situation of the structure to optimize the design.
Based on this study, we apply this method to structural optimization design. By optimizing different vibration modes, we succeeded in reducing noise and vibration, and improving the strength and stability of the structure. Therefore, in the optimal design of engineering structures, this method can be used as an effective tool to help designers better realize the requirements of structural optimization design.
In conclusion, the vibration mode analysis method of elastic disk under piezoelectric disk excitation can effectively analyze the vibration characteristics and vibration mode of the structure, and help the structural optimization design. This method has important application value for improving the strength and stability of the structure, reducing vibration and noise, and realizing energy saving and emission reduction.
Third, the frequency response characteristics analysis and application research of elastic disc in air medium under piezoelectric disk excitation
Piezoelectric disc excitation elastic disc is a special vibration system, which is widely used in mechanical engineering, non-contact non-destructive testing in the field of aircraft, long-term monitoring and other applications. This paper will discuss the frequency response characteristics of elastic discs in air media under piezoelectric disk excitation, and focus on its application in engineering.
The vibration response signal of the elastic disc in the air medium under the excitation of the piezoelectric disc is transmitted through the air medium, and its vibration response is affected by the air medium.
Therefore, physical parameters such as density and viscosity of an air medium play an important role in its vibration response. Through mathematical modeling analysis, the response model of elastic disk in air medium under piezoelectric disk excitation is determined, and the corresponding calculation model is further established.
In the experimental part, we design a set of elastic disk vibration signal acquisition system under piezoelectric disk excitation to measure its vibration response signal in air medium. Spectral analysis and other methods are used to study its frequency response characteristics. The experimental results show that the flow of air has a significant influence on the vibration response of the elastic disk under the excitation of the piezoelectric disk, and the degree of influence varies with the speed of air flow and the driving frequency of the piezoelectric disk.
In terms of application, the frequency response characteristics of elastic discs in air media under piezoelectric disk excitation can be applied to many practical scenarios, such as long-term monitoring of aircraft and their components, structural damage detection, etc. By studying its response characteristics, we can understand the vibration behavior of structures, accelerate damage detection and evaluation, improve aircraft safety and reliability, and reduce related expenses and maintenance costs.
In summary, this paper conducts mathematical modeling, experimental research and application discussion on the frequency response characteristics of elastic disks in air medium under piezoelectric disk excitation, indicating the importance of studying their frequency response characteristics and its wide practical application value. With the continuous development of the engineering field, there is also a broader space for research and application.
4. Biomedical signal acquisition and analysis of elastic discs under piezoelectric disk excitation
The elastic disc under piezoelectric disc excitation is a special vibration system with the characteristics of non-contact, high precision and high sensitivity. Such systems have important applications in biomedical signal acquisition and analysis research.
With the theme of biomedical signal acquisition and analysis based on elastic disk excitation under piezoelectric disk excitation, the application of this technology in biomedical signal acquisition and analysis and its experimental results are studied.
The application of elastic disk under piezoelectric disk excitation in biomedical signal acquisition is to realize non-contact detection and analysis of biomedical objects by contacting biomedical objects with elastic disks, so that the vibration response signal of biomedical objects is transmitted to the detection instrument through the elastic disk. This method has the advantages of high speed, high sensitivity, high precision, etc., and will not cause damage to biomedical objects.
In the experimental part, taking the neural signal acquisition and analysis of locusts as an example, a set of elastic disk signal acquisition system under piezoelectric disk excitation was first designed, and multi-channel signal processing technology was used to collect locust neural signals, and at the same time, the MATLAB toolbox was used to analyze the signals and extract relevant feature parameters.
Experimental results show that the biomedical signal acquisition and analysis system based on elastic disk under piezoelectric disk excitation can effectively acquire and analyze locust neural signals.
In terms of application, this technology can also be applied to the measurement of arterial wall membrane elastic coefficient, the acquisition and analysis of gastrointestinal peristalsis signals, cardiac impedance imaging and other biomedical fields. At the same time, the technology can also be used for non-contact detection and analysis in other engineering fields, such as the study of vibration characteristics of mechanical structures.
In summary, in the research of biomedical signal acquisition and analysis, the technology of elastic disk based on piezoelectric disc excitation has the advantages of non-contact, high speed, high sensitivity and high precision, which can effectively realize the acquisition and analysis of biomedical signals. With the continuous development of this technology, there will be a broader space for research and application.
Vibration mode analysis refers to a method of analyzing the characteristics and motion laws of each vibration mode of a structure in the process of structural vibration. Through vibration mode analysis, the dynamic properties of the structure can be studied and the design can be optimized.
For structural damage detection, piezoelectric disc excitation technology enables the detection and diagnosis of defects and damage in structures. Specifically, by applying a piezoelectric excitation signal to the structure under test and detecting the vibration mode and spectral distribution of its response signal, the location and properties of structural defects can be obtained.
At the same time, by comparing the vibration mode and spectrum distribution of the structure in the normal state and the damaged state, the degree of structural damage can be evaluated, and reliable detection results and early warning measures can be provided.
Regarding the application of optimization design, piezoelectric disk excitation technology can determine the vibration mode of the structure and its influencing factors by collecting and analyzing the structural response signal, and then realize the optimal design of the structure vibration mode.
For application scenarios that need to optimize structural vibration characteristics and improve structural dynamic performance, such as aerospace technology, high-speed trains, building structures, etc., the optimization design capability of piezoelectric disc excitation technology can provide effective technical support.