WO2015180477A1 - Test system and test method for natural vibration frequency of bogie of track vehicle - Google Patents
Test system and test method for natural vibration frequency of bogie of track vehicle Download PDFInfo
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- G—PHYSICS
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- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
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- the invention belongs to the technical field of mechanical performance testing, and relates to a self-vibration frequency testing device for a bogie of a railway vehicle and a self-vibrating frequency of the bogie using the device. testing method.
- the self-vibration frequency of the bogie of the rail vehicle is an important factor affecting the safe operation of the rail vehicle.
- the self-vibration frequency of the bogie of the rail vehicle is directly related to the self-vibration characteristics of the whole vehicle, which affects the dynamic performance of the whole vehicle. Bogie resonance may cause excessive noise inside the car, and it will cause fatigue damage to the frame and the car body, reducing the service life of the vehicle.
- the test stands for rail vehicles at home and abroad are mostly test benches for vehicles. Although the self-vibration characteristics of rail vehicles can be tested, they are generally comprehensive test benches. The test items are extensive, and the cost of test bench development, manufacturing, use and maintenance is relatively high. High, at the same time, the rail vehicle test bench can only test the whole vehicle.
- the technical problem to be solved by the present invention is to provide a self-vibration frequency test system for a bogie of a railway vehicle.
- the present invention also provides a method of testing the natural frequency of a bogie using such a system.
- the device of the present invention consists of a test platform, a vertical actuator, a semi-vehicle mass simulation device and a longitudinal actuator, tested A wheelset clamping mechanism is mounted on each of the four corners of the platform.
- the bottoms of the four corners of the test platform are respectively connected by a hinge support with a downward vertical actuator, and the bottom of each vertical actuator passes.
- the hinge support is connected with a fixed seat.
- the semi-vehicle mass simulation device is above the test platform.
- Two longitudinal actuators are horizontally mounted on the rear side of the semi-vehicle mass simulation device through the hinge support, and the other end of the longitudinal actuator is passed.
- the hinge support is connected to a fixed seat.
- the system tests the natural frequency of the rail vehicle bogie by the following steps:
- the wheel of the bogie is fixed on the test platform by the wheel pair clamping mechanism, and then the half-car mass simulation device is fixedly connected with the bogie bolster.
- the fixed seat of the longitudinal actuator is fixed to a firm object;
- a laser displacement sensor is arranged at each of the four corners of the side frame of the bogie frame, that is, a laser displacement sensor is arranged above each corner of the four corners of the bogie, and the laser displacement sensor is connected with the data acquisition system;
- the actuator applies an excitation signal to cause the test platform to be vertically excited.
- the vertical excitation of the test platform will vibrate together with the bogie, and the displacement of the end of the side frame of the bogie frame is measured by the laser displacement sensor, and the data acquisition system records The displacement of the end of the side beam of the frame is changed, and the response curve of the displacement and the frequency is obtained, and the time domain waveform of the vehicle body vibration and the frequency domain waveform are obtained.
- the vibration frequency of the maximum vibration response point of the vehicle body or the frame can be obtained, thereby Determine the natural frequency of the frame and the corresponding formation of the car body.
- the actuator has an amplitude of 2 mm, and the excitation frequency is continuously linearly swept from 0.1 hz to 10 hz, and the sweep speed is 0.035 hz/s.
- the system of the invention has simple structure and high test precision, and can truly reflect the self-vibration characteristics of the vehicle.
- Figure 1 is a schematic diagram of the test system
- Figure 2 is a waveform diagram of the vibration time domain of the vertical swept frame
- Figure 3 is a waveform diagram of the vibration frequency domain of the vertical swept frame.
- the system of the present invention consists of a test platform 1, a vertical actuator 2, a semi-vehicle mass simulation device 3, and a longitudinal actuator 4, tested A wheelset clamping mechanism 5 is mounted on each of the four corners of the platform 1, and the bottoms of the four corners of the test platform 1 are respectively passed through the hinge support.
- a downward vertical actuator 2 the bottom of each vertical actuator 2 is connected to a fixed seat 8 via a hinge support 7, and the semi-vehicle mass simulation device 3 is above the test platform 1 with two longitudinal Actuator 4 passes
- the hinge support 7 is horizontally mounted on the rear side of the semi-vehicle mass simulation device 3, and the other end of the longitudinal actuator 4 is connected to the fixed base 8 via the hinge support 7.
- the mounts of all vertical actuators are respectively connected with a hydraulic servo system, and the wheel of the bogie 6 is fixed on the test platform by the wheel pair clamping mechanism 5, and then the half-car mass simulation device is fixedly connected with the bogie bolster, and the longitudinal direction is made.
- Actuator The mount is fixed to a solid object.
- a laser displacement sensor is arranged at each of the four corners of the side frame of the bogie frame, that is, a laser displacement sensor is arranged above each corner of the four corners of the bogie, and the laser displacement sensor is connected with the data acquisition system, and is actuated by the hydraulic servo system.
- the excitation signal is applied to make the test platform vertical excitation, the amplitude is 2mm, the excitation frequency is from 0.1hz to 10hz continuous linear sweep, the sweep speed is 0.035hz/s, and the vertical excitation of the test platform will be carried together with the bogie Vibration, the displacement of the end of the side frame of the bogie frame is measured by the laser displacement sensor.
- the data acquisition system records the displacement of the end of the side beam of the frame, so as to obtain the response curve of displacement and frequency, and obtain the time domain waveform and frequency of the vibration of the vehicle body.
- the waveform of the domain, through the response curve can obtain the vibration frequency of the maximum vibration response point of the car body or the frame, thereby determining the natural frequency of the frame and the corresponding formation of the vehicle body.
- the upper part of the half-car mass simulation device can be increased in weight, and the size and weight of the weight will be calculated according to the weight of the car body, so that the half-car mass simulation device is closer to the real car body.
- the longitudinal actuator acts as a stabilizer and at the same time has no effect on the test process due to its flexibility.
- the semi-vehicle quality simulation device is fixedly connected with the self-developed 300 km bogie bolster, longitudinal actuator
- the fixing seat is fixed on a firm object
- the displacement sensor is placed on the corresponding position of the car body.
- the position of the cloth is as follows:
- a laser displacement sensor is arranged above each corner of the four corners of the bogie to measure the amount of vertical displacement change at the end of the frame;
- the test platform In the vertical sweep, the test platform is vertically excited with a bogie, with an amplitude of 2mm and a frequency sweep from 0.1hz to 10hz.
- the measured time domain waveform of the bogie frame and the frequency domain waveform are shown in Figure 1 and Figure 2. According to the test results, the first-order floating frequency of the frame is 5.86HZ.
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Abstract
A test system and a test method for the natural vibration frequency of a bogie of a track vehicle, which belong to the technical field of mechanical performance tests. The test system is composed of a test platform (1), vertical actuators (2), a half-vehicle mass simulation device (3) and vertical actuators (4), wherein wheelset clamping mechanisms (5) are installed on the test platform (1); the bottom of each of four corners of the test platform (1) is respectively connected to one downward vertical actuator (2); and the half-vehicle mass simulation device (3) is arranged above the test platform (1). During a test, wheels of a bogie are fixed to the test platform (1) by means of the wheelset clamping mechanisms (5), then the half-vehicle mass simulation device (3) is fixedly connected to a bogie bolster, a laser displacement sensor is respectively arranged at each of four corners above a side beam of a bogie frame, the laser displacement sensor is connected to a data collection system, an excitation signal is applied to each vertical actuator (2) through a hydraulic servo system, and the data collection system records the change of the displacement of an end for the side beam of the frame, thereby obtaining a response curve between a displacement and a frequency, so as to determine a natural vibration frequency in a formation corresponding to the frame and a vehicle body. The system has a simple structure and high test accuracy, and can really reflect the natural vibration characteristic of a vehicle.
Description
技术领域 Technical field
本发明属于机械性能测试技术领域，涉及轨道车辆 转向架自振频率测试 装置以及利用这种装置对 转向架自振频率 的
测试 方法。 The invention belongs to the technical field of mechanical performance testing, and relates to a self-vibration frequency testing device for a bogie of a railway vehicle and a self-vibrating frequency of the bogie using the device.
testing method.
背景技术 Background technique
随着中国铁路的快速发展，轨道车辆线路运行速度越来越快，这使得车辆的安全运行问题越来越突出，并且随着中国经济的飞速发展，人民物质生活越来越好，使得乘客对轨道车辆运行的平稳性与舒适性要求越来越高，需要更准确更快捷的检测技术来指导高铁的设计开发与制造，确保高铁安全运行，提高车体内部的平稳，减少噪声，让乘客在乘车过程感觉更加舒适。
With the rapid development of China's railways, rail vehicles are running faster and faster, which makes the safe operation of vehicles more and more prominent. With the rapid development of China's economy, people's material life is getting better and better, making passengers The stability and comfort requirements of rail vehicles are getting higher and higher, and more accurate and faster detection technology is needed to guide the design development and manufacture of high-speed rail, ensure the safe operation of high-speed rail, improve the stability of the interior of the vehicle body, reduce noise, and let passengers The ride feels more comfortable.
轨道车辆转向架自振频率是影响轨道车辆安全运行的重要因素。轨道车辆转向架自振频率直接关系到整车的自振特性，影响整车运行的动力学性能。转向架共振可能会导致车内噪声过大，同时会造成构架及车体的疲劳性损坏，减小车辆的使用寿命。目前国内外轨道车辆试验台多为整车试验台，虽然可以进行轨道车辆的自振特性试验，但其一般都属于综合性试验台，测试项目广泛，试验台研发、制造、使用及维护成本较高，同时轨道车辆试验台通常只能对整车进行试验，无法单独对转向架进行自振特性测试，这就造成转向架研发过程中对转向架自振特性进行测试时必须将车体与转向架组装在一起，导致转向架自振特性试验周期长且试验成本高，从而增加转向架的研发周期。
The self-vibration frequency of the bogie of the rail vehicle is an important factor affecting the safe operation of the rail vehicle. The self-vibration frequency of the bogie of the rail vehicle is directly related to the self-vibration characteristics of the whole vehicle, which affects the dynamic performance of the whole vehicle. Bogie resonance may cause excessive noise inside the car, and it will cause fatigue damage to the frame and the car body, reducing the service life of the vehicle. At present, the test stands for rail vehicles at home and abroad are mostly test benches for vehicles. Although the self-vibration characteristics of rail vehicles can be tested, they are generally comprehensive test benches. The test items are extensive, and the cost of test bench development, manufacturing, use and maintenance is relatively high. High, at the same time, the rail vehicle test bench can only test the whole vehicle. It is impossible to test the self-vibration characteristics of the bogie alone. This results in the car body and steering when testing the self-vibration characteristics of the bogie during the development of the bogie. The racks are assembled together, resulting in a long test period of the self-vibration characteristics of the bogie and high test cost, thereby increasing the development period of the bogie.
- 目前，国内的转向架自振频率单独测试系统还不多，主要是依托转向架参数试验台进行测试，如西南交通大学的轨道车辆转向架测试台(专利号：ZL200610022671.3；授权公告号：CN100445721C；)以及吉林大学专利四柱式轨道车辆转向架刚度测试系统（专利号：ZL200810050261.9；授权公告号：CN101216376B；）等，但测试系统设计结构复杂，没有针对性地测试转向架自振频率，从而降低了试验测试的精度，不能真实反映出车辆的自振特性。 At present, there are not many independent test systems for self-vibration frequency of bogies in China, mainly relying on bogie parameter test bench for testing, such as the track vehicle bogie test bench of Southwest Jiaotong University (patent number: ZL200610022671.3; authorization notice number: CN100445721C;) and Jilin University patented four-column rail vehicle bogie stiffness test system (patent number: ZL200810050261.9; authorization announcement number: CN101216376B;), etc., but the test system design structure is complex, no specific test bogie natural vibration frequency Therefore, the accuracy of the test test is reduced, and the self-vibration characteristics of the vehicle cannot be truly reflected.
发明内容 Summary of the invention
本发明要解决的技术问题是提供一种 轨道车辆转向架自振频率测试系统 。 The technical problem to be solved by the present invention is to provide a self-vibration frequency test system for a bogie of a railway vehicle.
本发明还提供了利用这种 系统对转向架自振频率测试的方法 。 The present invention also provides a method of testing the natural frequency of a bogie using such a system.
本发明装置由 测试 平台、垂向作动器、 半车质量模拟装置 和纵向作动器构成， 测试
平台的台面四角处分别安装有一个 轮对夹紧机构 ， 测试 平台的四个角的底部分别通过 铰链支座 连接有一个向下的垂向作动器，每个垂向作动器的底部通过
铰链支座连接有固定座， 半车质量模拟装置在测试 平台上方，有两个纵向作动器分别通过 铰链支座 水平安装在 半车质量模拟装置后侧面， 纵向作动器另一端通过
铰链支座连接有固定座 。 The device of the present invention consists of a test platform, a vertical actuator, a semi-vehicle mass simulation device and a longitudinal actuator, tested
A wheelset clamping mechanism is mounted on each of the four corners of the platform. The bottoms of the four corners of the test platform are respectively connected by a hinge support with a downward vertical actuator, and the bottom of each vertical actuator passes.
The hinge support is connected with a fixed seat. The semi-vehicle mass simulation device is above the test platform. Two longitudinal actuators are horizontally mounted on the rear side of the semi-vehicle mass simulation device through the hinge support, and the other end of the longitudinal actuator is passed.
The hinge support is connected to a fixed seat.
本系统通过以下步骤对 轨道车辆转向架自振频率 进行测试： The system tests the natural frequency of the rail vehicle bogie by the following steps:
1 、将所有 垂向作动器的固定座固定在地面上， 四个垂向作动器分别连接有液压伺服系统； 1. Fixing the fixing seats of all vertical actuators on the ground, and connecting four vertical actuators to the hydraulic servo system;
2 、 通过轮对夹紧机构将转向架的车轮固定在测试平台上，再将半车质量模拟装置与转向架摇枕固定连接，
纵向作动器的 固定座固定在牢固的物体上； 2, the wheel of the bogie is fixed on the test platform by the wheel pair clamping mechanism, and then the half-car mass simulation device is fixedly connected with the bogie bolster.
The fixed seat of the longitudinal actuator is fixed to a firm object;
3 、
转向架构架侧梁上方四个角分别布置有一个激光位移传感器于，即转向架四个角每一个角上方布置一个激光位移传感器，激光位移传感器与数据采集系统连接； 3,
A laser displacement sensor is arranged at each of the four corners of the side frame of the bogie frame, that is, a laser displacement sensor is arranged above each corner of the four corners of the bogie, and the laser displacement sensor is connected with the data acquisition system;
4 、 通过液压伺服系统对 垂向
作动器施加激励信号，使测试平台垂向激振，测试平台垂向激振将带着转向架一起振动，通过激光位移传感器测得转向架构架侧梁端部的位移变化，数据采集系统记录构架侧梁端部位移变化，从而得到位移与频率的响应曲线，得到车体振动的时域波形以及频域波形，通过响应曲线，可以获取车体或构架的最大振动响应点的振动频率，从而确定构架和车体相应阵型下的自振频率。 4, through the hydraulic servo system to the vertical
The actuator applies an excitation signal to cause the test platform to be vertically excited. The vertical excitation of the test platform will vibrate together with the bogie, and the displacement of the end of the side frame of the bogie frame is measured by the laser displacement sensor, and the data acquisition system records The displacement of the end of the side beam of the frame is changed, and the response curve of the displacement and the frequency is obtained, and the time domain waveform of the vehicle body vibration and the frequency domain waveform are obtained. Through the response curve, the vibration frequency of the maximum vibration response point of the vehicle body or the frame can be obtained, thereby Determine the natural frequency of the frame and the corresponding formation of the car body.
其中， 垂向
作动器振幅2mm，激振频率从0.1hz到10hz连续线性扫频，扫频速度为0.035hz/s。 Of which, vertical
The actuator has an amplitude of 2 mm, and the excitation frequency is continuously linearly swept from 0.1 hz to 10 hz, and the sweep speed is 0.035 hz/s.
本发明系统结构简单， 测试精度高，能够真实反映出车辆的自振特性。 The system of the invention has simple structure and high test precision, and can truly reflect the self-vibration characteristics of the vehicle.
附图说明 DRAWINGS
图 1 为本测试系统的示意图； Figure 1 is a schematic diagram of the test system;
图 2 为垂向扫频构架振动时域波形图； Figure 2 is a waveform diagram of the vibration time domain of the vertical swept frame;
图 3 为垂向扫频构架振动频域波形图。 Figure 3 is a waveform diagram of the vibration frequency domain of the vertical swept frame.
具体实施方式 detailed description
下面结合附图和实施例对本发明作进一步说明。 The invention will now be further described with reference to the accompanying drawings and embodiments.
本发明系统由 测试 平台1、垂向作动器2、 半车质量模拟装置3 和纵向作动器4构成， 测试
平台1的台面四角处分别安装有一个 轮对夹紧机构5 ， 测试 平台1的四个角的底部分别通过 铰链支座 7
连接有一个向下的垂向作动器2，每个垂向作动器2的底部通过 铰链支座 7 连接有固定座 8 ， 半车质量模拟装置3在测试 平台1上方，有两个纵向作动器4分别通过
铰链支座 7 水平安装在 半车质量模拟装置3后侧面， 纵向作动器4另一端通过 铰链支座 7 连接有固定座 8 。 The system of the present invention consists of a test platform 1, a vertical actuator 2, a semi-vehicle mass simulation device 3, and a longitudinal actuator 4, tested
A wheelset clamping mechanism 5 is mounted on each of the four corners of the platform 1, and the bottoms of the four corners of the test platform 1 are respectively passed through the hinge support.
Connected to a downward vertical actuator 2, the bottom of each vertical actuator 2 is connected to a fixed seat 8 via a hinge support 7, and the semi-vehicle mass simulation device 3 is above the test platform 1 with two longitudinal Actuator 4 passes
The hinge support 7 is horizontally mounted on the rear side of the semi-vehicle mass simulation device 3, and the other end of the longitudinal actuator 4 is connected to the fixed base 8 via the hinge support 7.
将所有 垂向作动器的固定座固定在地面上，
四个垂向作动器分别连接有液压伺服系统，通过轮对夹紧机构5将转向架6的车轮固定在测试平台上，再将半车质量模拟装置与转向架摇枕固定连接， 纵向作动器的
固定座固定在牢固的物体上，
转向架构架侧梁上方四个角分别布置有一个激光位移传感器于，即转向架四个角每一个角上方布置一个激光位移传感器，激光位移传感器与数据采集系统连接，通过液压伺服系统对作动器施加激励信号，使测试平台垂向激振，振幅2mm，激振频率从0.1hz到10hz连续线性扫频，扫频速度为0.035hz/s，测试平台垂向激振将带着转向架一起振动，通过激光位移传感器测得转向架构架侧梁端部的位移变化，数据采集系统记录构架侧梁端部位移变化，从而得到位移与频率的响应曲线，得到车体振动的时域波形以及频域波形，通过响应曲线，可以获取车体或构架的最大振动响应点的振动频率，从而确定构架和车体相应阵型下的自振频率。 Fix the mounts of all vertical actuators to the ground,
The four vertical actuators are respectively connected with a hydraulic servo system, and the wheel of the bogie 6 is fixed on the test platform by the wheel pair clamping mechanism 5, and then the half-car mass simulation device is fixedly connected with the bogie bolster, and the longitudinal direction is made. Actuator
The mount is fixed to a solid object.
A laser displacement sensor is arranged at each of the four corners of the side frame of the bogie frame, that is, a laser displacement sensor is arranged above each corner of the four corners of the bogie, and the laser displacement sensor is connected with the data acquisition system, and is actuated by the hydraulic servo system. The excitation signal is applied to make the test platform vertical excitation, the amplitude is 2mm, the excitation frequency is from 0.1hz to 10hz continuous linear sweep, the sweep speed is 0.035hz/s, and the vertical excitation of the test platform will be carried together with the bogie Vibration, the displacement of the end of the side frame of the bogie frame is measured by the laser displacement sensor. The data acquisition system records the displacement of the end of the side beam of the frame, so as to obtain the response curve of displacement and frequency, and obtain the time domain waveform and frequency of the vibration of the vehicle body. The waveform of the domain, through the response curve, can obtain the vibration frequency of the maximum vibration response point of the car body or the frame, thereby determining the natural frequency of the frame and the corresponding formation of the vehicle body.
其中半车质量模拟装置的上部可以增加砝码，砝码的大小与重量将根据车体的重量等效计算获取，使半车质量模拟装置更接近于真实车体。
纵向作动器起到稳定作用，同时由于其能够伸缩自如，对测试过程不产生影响。
The upper part of the half-car mass simulation device can be increased in weight, and the size and weight of the weight will be calculated according to the weight of the car body, so that the half-car mass simulation device is closer to the real car body.
The longitudinal actuator acts as a stabilizer and at the same time has no effect on the test process due to its flexibility.
以自主研发 300 公里 系转向架为实例 Taking the self-developed 300 km bogie as an example
按照以上所述试验过程： Follow the test procedure described above:
- A、 将 自主研发 300 公里 转向架安装在测试试验平台上，参照本试验测试示意图， 通过轮对夹紧机构将 自主研发 300 公里 转向架的车轮固定在测试平台上 ； A. The self-developed 300-kilometer bogie will be installed on the test and test platform. Refer to the test test diagram, and the wheel-to-clamp mechanism will be The wheels of the self-developed 300 km bogie are fixed on the test platform;
B ． 将半车质量模拟装置与 自主研发 300 公里 转向架摇枕固定连接， 纵向作动器的
固定座固定在牢固的物体上 ; B. The semi-vehicle quality simulation device is fixedly connected with the self-developed 300 km bogie bolster, longitudinal actuator
The fixing seat is fixed on a firm object;
C ． 根据试验大纲要求对车体相应位置布位移传感器，所布位置如下： C. According to the requirements of the test program, the displacement sensor is placed on the corresponding position of the car body. The position of the cloth is as follows:
在转向架构架构架端部处，布置四个位移传感器，一个端部处一个，
即转向架四个角每一个角上方布置一个激光位移传感器， 测构架端部的垂向位移变化量； At the end of the steering frame, four displacement sensors are arranged, one at each end,
That is, a laser displacement sensor is arranged above each corner of the four corners of the bogie to measure the amount of vertical displacement change at the end of the frame;
D. 编制自振工况的试验谱，设定参数为：正弦波形式连续加载，
振幅2mm，激振频率从0.1hz到10hz连续线性扫频，扫频速度为0.035hz/s ； D. Prepare the test spectrum of the self-vibrating condition, and set the parameters as: continuous loading in the form of sine wave.
The amplitude is 2mm, the excitation frequency is from 0.1hz to 10hz continuous linear sweep, and the sweep speed is 0.035hz/s;
E ． 通过以上工况测试得到的位移数据，经过数据处理和分析可以得到自主研发 300 公里转向架自振频率
. E. Through the above-mentioned working condition test displacement data, after data processing and analysis, the self-vibration frequency of 300 km bogie can be obtained independently.
.
垂向扫频时， 测试平台带着转向架垂向激振，振幅 2mm ，频率从 0.1hz 到 10hz 连续扫频，
测得的转向架构架时域波形以及频域波形， 如图 1 和图 2 所示 。根据测试的结果，构架的一阶浮沉频率为 5.86HZ 。 In the vertical sweep, the test platform is vertically excited with a bogie, with an amplitude of 2mm and a frequency sweep from 0.1hz to 10hz.
The measured time domain waveform of the bogie frame and the frequency domain waveform are shown in Figure 1 and Figure 2. According to the test results, the first-order floating frequency of the frame is 5.86HZ.
Claims (1)
- 一种 轨道车辆转向架自振频率测试系统 ，其特征在于 ：它由 测试 平台、垂向作动器、 半车质量模拟装置 和纵向作动器构成， 测试 平台的台面四角处分别安装有一个 轮对夹紧机构 ， 测试 平台的四个角的底部分别通过 铰链支座 连接有一个向下的垂向作动器，每个垂向作动器的底部通过 铰链支座连接有固定座， 半车质量模拟装置在测试 平台上方，有两个纵向作动器分别通过 铰链支座 水平安装在 半车质量模拟装置后侧面， 纵向作动器另一端通过 铰链支座连接有固定座 。A self-vibration frequency testing system for a bogie of a railway vehicle, characterized in that: it is composed of a test platform, a vertical actuator, and a semi-vehicle quality simulation device. And a longitudinal actuator, a wheelset clamping mechanism is respectively installed at the four corners of the test platform, and the bottoms of the four corners of the test platform are respectively passed through the hinge support Attached is a downward vertical actuator, the bottom of each vertical actuator is connected to the fixed seat by a hinge support, the semi-vehicle mass simulation device is above the test platform, and two longitudinal actuators are respectively passed through the hinge The support is mounted horizontally On the rear side of the semi-vehicle mass simulation device, the other end of the longitudinal actuator is connected to the fixed seat via a hinge support.[2][2]根据权利要求1所述的 轨道车辆转向架自振频率测试系统对转向架自振频率测试的方法 ，其特征在于由以下步骤实现 ：The method for testing a natural frequency of a bogie of a self-vibrating frequency test system for a bogie of a railway vehicle according to claim 1, wherein the method is implemented by the following steps :（ 1 ）将所有 垂向作动器的固定座固定在地面上， 四个垂向作动器分别连接有液压伺服系统；(1) Fixing the fixing seats of all the vertical actuators on the ground, and the four vertical actuators are respectively connected with the hydraulic servo system;（ 2 ） 通过轮对夹紧机构将转向架的车轮固定在测试平台上，再将半车质量模拟装置与转向架摇枕固定连接， 纵向作动器的 固定座固定在牢固的物体上；(2) Fixing the wheel of the bogie to the test platform by the wheelset clamping mechanism, and then fixing the half-car mass simulation device to the bogie bolster, the longitudinal actuator The fixing seat is fixed on a firm object;（ 3 ） 转向架构架侧梁上方四个角分别布置有一个激光位移传感器于，即转向架四个角每一个角上方布置一个激光位移传感器，激光位移传感器与数据采集系统连接；(3) A laser displacement sensor is arranged at each of the four corners of the side frame of the bogie frame, that is, a laser displacement sensor is arranged above each corner of the four corners of the bogie, and the laser displacement sensor is connected with the data acquisition system;（ 4 ） 通过液压伺服系统对 垂向 作动器施加激励信号，使测试平台垂向激振，通过激光位移传感器测得转向架构架侧梁端部的位移变化，数据采集系统记录构架侧梁端部位移变化，从而得到位移与频率的响应曲线，得到车体振动的时域波形以及频域波形，通过响应曲线，可以获取车体或构架的最大振动响应点的振动频率，从而确定构架和车体相应阵型下的自振频率。(4) Vertically oriented by hydraulic servo system The actuator applies an excitation signal to vertically oscillate the test platform, and the displacement of the end of the side frame of the bogie frame is measured by the laser displacement sensor. The data acquisition system records the displacement of the end of the side beam of the frame to obtain displacement and frequency. According to the response curve, the time domain waveform of the vehicle body vibration and the frequency domain waveform are obtained. Through the response curve, the vibration frequency of the maximum vibration response point of the vehicle body or the frame can be obtained, thereby determining the natural vibration frequency of the frame and the corresponding formation of the vehicle body.[3]根据权利要求 2 所述的方法，其特征在于： 垂向 作动器振幅2mm，激振频率从0.1hz到10hz连续线性扫频，扫频速度为0.035hz/s。[3]The method of claim 2 wherein: the vertical actuator has an amplitude of 2 mm and the excitation frequency is continuously linearly swept from 0.1 hz to 10 hz with a sweep speed of 0.035 hz/s.
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