Rolling collision test bench and test method

Abstract

The invention belongs to the technical field of collision tests, and relates to a rolling collision test method, which comprises the following steps of: S1, determining test configuration parameters according to a test vehicle vertical speed, a sliding table test acceleration, a sliding table test speed, a test vehicle rotating speed and a collision angle required by a current working condition of a rolling collision test, the test configuration parameters comprise a test vehicle falling height, a rotating speed of a rotating motor, a sliding table launching moment, a test vehicle falling moment, a sliding table test waveform and a guide rail plate installation angle; s2, setting an installation angle of a guide rail plate, and installing the test vehicle on the support rack; s3, the test vehicle is lifted to the test vehicle falling height, then a rotating motor is started, and the rotating speed of a rotating arm reaches the rotating arm test rotating speed; s4, the rotating arm is released to enable the test vehicle to fall, then the sliding table is emitted according to the sliding table test waveform, and the test vehicle makes contact with the sliding table to generate rolling collision; and S5, collecting and storing test data. The problem that a rolling test result in an existing rolling collision test is not reliable is solved.

Description

Technical Field

[0001] The invention relates to the technical field of collision tests, and in particular to a rollover collision test bench and a test method. Background Art

[0002] At present, the main test methods for simulating automobile rollover accidents include roof crush test, trolley roller rollover test and repeatable rollover test. The roof crush test is mainly used to measure the compressive resistance of the automobile roof under quasi-static conditions. Although this method can provide important information about the strength of the roof structure, it cannot truly reproduce the dynamic collision process between the roof and the ground in a rollover accident. Therefore, it cannot fully evaluate the safety of the vehicle in an actual rollover accident. The trolley roller rollover test attempts to make up for the above shortcomings by simulating the rollover process of the vehicle under specific conditions, but the simulated vehicle motion pattern is still quite different from the actual rollover accident, and can only represent a very limited type of rollover situation. In addition, since the vehicle's motion trajectory is uncontrollable during the test, the repeatability of this method is poor, which limits its application value in scientific research and technical verification. Repeatable rollover tests, such as CRIS (Controlled Rollover System) and JRS (Jordan Rollover Collision System), attempt to simulate the vehicle rotation process in a rollover accident through a spinning mechanism to improve the controllability and repeatability of the test. However, this type of repetitive rollover experiment cannot fully capture all relevant dynamic factors, such as collision angle, etc., and may have limitations in safety assessment, thus affecting the reliability of the rollover test results. Summary of the invention

[0003] The invention provides a rollover collision test bench and a test method, which solve the problems that the simulated working conditions in the existing rollover collision test are not fully covered and the safety assessment has limitations, thus affecting the reliability of the rollover test results.

[0004] The present invention provides a solution: a rollover collision test bench, comprising a base, two supporting frames, a slide, a slide driving device, a rotating device, and a lifting device; the slide is slidably fitted on the base and driven by the slide driving device; the two supporting frames are fixed on the base and are respectively located on both sides of the slide, and a rotating arm is arranged between the two supporting frames for fixing the test vehicle, the upper part of the supporting frame is provided with a first positioning hole, and the lower part is provided with a plurality of first fixing holes, the first positioning hole and the first fixing hole are used for installing a guide rail plate, a guide rail is arranged on the guide rail, a slider is slidably fitted on the guide rail, the rotating arm is supported on the slider, the rotating arm is connected to the rotating device, and the slider is connected to the lifting device.

[0005] The principle and advantage of this scheme are as follows: by supporting both ends of the rotating arm on the slider of the supporting frame, under the action of the lifting device, the slider can rise with the guide rail to lift the test vehicle installed on the rotating arm to the set test height. During the test, the slider falls along the guide rail to simulate the vertical acceleration of the vehicle falling in a rollover collision accident. The lifting device is used to lift different heights, and the test height is accurately set with high control accuracy; and the guide rail plate on which the slider is set is fixed to different second fixing holes to achieve the setting of different installation angles of the guide rail plate to meet the requirements of the rollover angle in the test conditions; the slide is slidably matched on the base, and the slide is slid on the base with a set waveform by the slide drive device to meet the horizontal position of the vehicle in different working conditions. The speed and acceleration of the rotating arm are measured in the vertical direction; the rotating arm is rotated at a certain angular velocity through the rotating device to meet the requirements of the vehicle rollover angular velocity in different working conditions; in the test, the test vehicle can collide with the slide with a set waveform at a specific vertical speed and rotational angular velocity to simulate different vehicle rollover collision accidents. By accurately simulating the actual situation of vehicle rollover collision, more accurate and reliable test data can be obtained, which provides a strong basis for the evaluation and improvement of vehicle safety performance, helps to improve the design and manufacturing quality of vehicles, and ensure road traffic safety, thereby solving the problem that the dynamic factors in the existing rollover experiments are insufficient, resulting in incomplete coverage of simulated working conditions and limitations in safety assessment, which affects the reliability of the rollover test results.

[0006] Among them, different first fixing holes are set to install the guide rail plate, so that the vehicle can be tested at different collision angles, and the dynamic factors in the rollover accident are considered in multiple dimensions. This structure that can flexibly select the installation position not only improves the compatibility of the test bench with different types of guide rail plates, but also facilitates the replacement and adjustment of the guide rail plates to adapt to various test scenarios, and has good repeatability, thereby improving the reliability of the test results;

[0007] The test vehicle is installed and fixed by two supporting stands and a rotating arm, which not only makes it convenient to install the test vehicle in a suitable position, but also allows the test vehicle's posture to be adjusted according to test requirements, ensuring that the test vehicle remains stable during the test and facilitating various rollover collision test operations. The stable structure and precise motion control help reduce risks during the test and ensure the safety of test personnel and equipment. The stable support and precise rotation control of the rotating arm can prevent the test vehicle from accidentally falling off or losing control during the rollover process, providing reliable safety protection for the test.

[0008] Preferably, the slider is laterally provided with a support hole, a first transmission shaft is supported in the support hole, and the two ends of the rotating arm are respectively fixedly connected to the first transmission shafts of the two support stands and supported on the slider through the first transmission shaft. By using the first transmission shaft to support the rotating arm, the stability of the rotating arm during the rotating operation can be ensured, and it helps to disperse the force applied to the rotating arm, reduce the risk that may be caused by excessive force on a single point, and improve the mechanical stability of the entire system. The design of using the support hole to accommodate the first transmission shaft and support the rotating arm through it simplifies the assembly and debugging process of the equipment, ensures the correct installation and stable operation of the rotating arm, and reduces the difficulty and cost of maintenance.

[0009] Preferably, the rotating device includes a rotating motor, a second transmission shaft, and a third transmission shaft, wherein the first transmission shaft is connected to the second transmission shaft via a universal joint, the second transmission shaft is connected to the third transmission shaft via a universal joint, and the third transmission shaft is fixedly connected to the motor shaft of the rotating motor. The method of connecting different transmission shafts with universal joints can effectively compensate for displacement deviations caused by installation errors or during operation, so that the relative position changes between the various components will not affect the normal operation of the overall system, and ensure the effective transmission of torque, thereby improving the reliability of the mechanical system; the structure can realize a complex power transmission path in a limited space by flexibly arranging the positions of the second transmission shaft and the third transmission shaft, which helps to optimize the structural layout of the entire test bench, making it more compact and efficient.

[0010] Preferably, a connector is provided between the first transmission shaft and the rotating arm, and a plurality of mounting holes are provided on the connector, and the mounting holes are used to install the rotating arm and the first transmission shaft. By using a connector with a plurality of mounting holes, the specific installation position of the rotating arm can be adjusted according to different test requirements, and the height, angle, etc. of the rotating arm can be flexibly adjusted, so that various collision and tumbling conditions can be simulated more accurately; multiple mounting holes provide more installation options, and the positional relationship between the rotating arm and the first transmission shaft can be more accurately aligned, which helps to improve the assembly accuracy of the entire system; the connector, as a bridge between the rotating arm and the first transmission shaft, can enhance the stability and bearing capacity of the overall structure, especially for application scenarios subject to greater stress, a reasonable connector design can effectively disperse the load and reduce the risk of local overload; compared with customizing rotating arms or transmission shafts of different specifications to meet different experimental requirements, it is more economical and efficient to use universal connectors and adjust the mounting holes, which reduces production costs and inventory pressure.

[0011] Preferably, the lifting device includes a lifting motor and a screw mechanism, wherein the motor shaft of the lifting motor is fixedly connected to the screw of the screw mechanism, and the nut of the screw mechanism is fixedly connected to the slider. By using the screw mechanism, the slider and the part connected to the slider can realize precise lifting and lowering operations along the screw, provide high position accuracy and repeatability, and ensure that the vehicle rollover collision test has an accurate test height; by driving the screw mechanism with a motor, the entire lifting process can be ensured to be smooth and impact-free, reducing the possible additional stress or damage to the experimental equipment and the test vehicle.

[0012] Another solution provided by the present invention is a rollover collision test method, which specifically comprises the following steps:

[0013] S1: Determine the test configuration parameters according to the vertical speed of the test vehicle, the slide test acceleration, the slide test speed, the test vehicle rotation speed, and the collision angle required by the current working condition of the rollover collision test, wherein the test configuration parameters include the drop height of the test vehicle, the rotation speed of the rotating motor, the slide launch time, the drop time of the test vehicle, the slide test waveform, and the guide rail plate installation angle;

[0014] S2: Set the guide rail panel installation angle according to the test configuration parameters and install the test vehicle on the support stand;

[0015] S3: lift the test vehicle by the lifting device to a height that reaches the falling height of the test vehicle, and then start the rotating motor to make the rotating arm's rotation speed reach the rotating arm test speed;

[0016] S4: Release the rotating arm to make the test vehicle fall down, and then launch the slide according to the slide test waveform through the slide drive device, so that the test vehicle contacts the slide and rolls over;

[0017] S5: Collect and save test data, where the test data includes vehicle body information after the test and dummy data in the test vehicle.

[0018] The principles and advantages of this solution are: according to the vertical speed, rotation speed, slide test speed, and collision angle of the test vehicle corresponding to the rollover collision condition of the current test, the test vehicle's falling height, rotating motor speed, slide test waveform, guide plate installation angle, slide launch time, and test vehicle falling time are determined, and the guide plate and test vehicle are set according to the determined test configuration parameters. The predetermined test configuration parameters can achieve precise control of the entire test process. It can ensure the consistency of each test condition, thereby improving the reliability and repeatability of the experimental results; and adjust the test configuration parameters according to different rollover collision test requirements, including key indicators such as the vertical speed of the test vehicle and the slide test acceleration, so that the test bench can be applied to the study of various different types of collision and rollover conditions;

[0019] This method has a systematic and programmed experimental process, which reduces the possibility of human intervention and speeds up the preparation and execution of the experiment. At the same time, since the experimental conditions are easy to replicate, it is conducive to repeated experiments to verify the stability of the results.

[0020] The falling moment of the test vehicle and the launching moment of the slide are set according to the corresponding working conditions to ensure that the test vehicle can collide with the moving slide when falling to accurately simulate the rollover collision test;

[0021] During the test, factors such as the collision angle are taken into account as dynamic factors of the rollover collision, so as to solve the problem that the limitations of the existing rollover collision test lead to unreliable rollover test results.

[0022] Preferably, when the installation angle of the guide rail plate is less than 15°, the falling height of the test vehicle has the following relationship:

[0023]

[0024] Where H1 is the drop height of the test vehicle when the guide plate installation angle is less than 15°, v z is the vertical velocity of the test vehicle, g is the acceleration due to gravity;

[0025] When the guide rail installation angle is greater than or equal to 15° and less than 25°, the falling height of the test vehicle has the following relationship:

[0026]

[0027] Where, the drop height of the test vehicle when the guide plate installation angle is greater than or equal to 15° and less than 25°, v z is the vertical velocity of the test vehicle, g is the acceleration of gravity, μ is the correction coefficient, and θ is the installation angle of the guide rail plate.

[0028] By using different calculation formulas for different angle ranges, various variables in actual rollover collision situations can be simulated more accurately, thereby improving the authenticity and reliability of the experimental results. In the case of larger angles (greater than or equal to 15° and less than 25°), the introduction of correction factors can ensure sufficient impact force while avoiding safety hazards caused by excessive acceleration. The introduction of correction factors takes into account the specific impact of the guide plate installation angle on the test process, making the design of the entire system more refined. It not only helps to improve the quality of experimental data, but also provides more accurate basic information for subsequent data analysis.

[0029] By accurately calculating the drop height of the test vehicle, the number of unnecessary repeated tests can be reduced, saving time and cost. At the same time, reasonable parameter settings can also help optimize the use efficiency of energy and other resources and achieve the best allocation of resources.

[0030] Preferably, the slide test waveform is a sine wave or a trapezoidal wave. According to different test purposes and vehicle models, the appropriate waveform can be selected. Sine waves can be used to study the fatigue characteristics of the vehicle structure under long-term cyclic loads, and trapezoidal waves can be used to examine the transient response capabilities of the vehicle and its internal components under extreme conditions. Combining the application of the two waveforms, the safety performance of the vehicle can be more comprehensively evaluated to ensure that the product design can perform well in daily use and provide adequate protection in emergencies. This not only meets the needs of different types of rollover collision tests, but also effectively improves the accuracy and reliability of the test results, providing strong support for improving automobile design.

[0031] Further preferably, when the slide table transmits a sine wave, the slide table transmitting moment satisfies the following relationship:

[0032]

[0033] Where T1 is the launch time of the sine wave slide, v z is the vertical velocity of the test vehicle, g is the acceleration of gravity, μ is the correction coefficient, θ is the installation angle of the guide plate, and σ is the period correction coefficient.

[0034] In different working conditions, the corresponding slide launch time is set for different ranges of collision angles. Especially in working conditions with large collision angles, determining the slide launch time based on the vertical speed of the test vehicle, gravity acceleration, correction coefficient and guide plate installation angle can more accurately simulate the rollover collision situation in the real world, making the experimental conditions closer to the actual situation; accurate calculation of the slide launch time helps to ensure the consistency of each test condition, thereby reducing the error caused by improper control of dependent variables, so as to improve the reliability and repeatability of experimental data.

[0035] Further preferably, when the slide table emits a trapezoidal wave, the slide table emission moment satisfies the following relationship:

[0036]

[0037] Where T2 is the launch time of the trapezoidal wave slide, v z is the vertical speed of the test vehicle, a x is the sliding table test acceleration, v x is the test speed of the slide, g is the acceleration of gravity, μ is the correction coefficient, and θ is the installation angle of the guide rail plate.

[0038] Adjusting relevant parameters according to specific test requirements and using the slide launch timing calculated based on specific parameters can not only enable the test vehicle to have a preset vertical speed and collide with the slide with the corresponding horizontal speed, but also improve the accuracy and effect of the rollover collision test, and enhance the safety and flexibility of the entire test process. It can also shorten unnecessary waiting time as much as possible and improve the efficiency of the entire test process while ensuring the quality of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is an axonometric view of the present invention;

[0040] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0041] Figure 3 It is an axonometric view of the present invention from another angle;

[0042] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0043] Figure 5 It is a front view of the present invention;

[0044] Figure 6 is a side view of the present invention;

[0045] Figure 7 for Figure 6 Sectional view along CC direction;

[0046] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0047] Fig. 9 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0048] The following is further described in detail through specific implementation methods:

[0049] Example 1

[0050] The specific implementation process is as follows: Figures 1 to 8, a test bench for automobile rollover collision test, comprising a base, two support stands, a slide 1, a rotating device, a lifting device, and a slide drive device 16. The slide drive device 16 is used to drive the slide 1; the base is provided with a slide rail, and the slide 1 is slidably matched with the base through the slide rail. The two support stands are fixed on the base and are respectively located on both sides of the slide 1. A rotating arm 6 is arranged between the two support stands for fixing the test vehicle. The upper part of the support stand is provided with a first positioning hole, and the lower part is provided with a plurality of first fixing holes 21. The first fixing holes are distributed in a plurality of arcs. In this embodiment, the first fixing holes are distributed in two arcs. The support stands each include a support frame 9 and a mounting plate 2. The support frame 9 is fixedly connected to the base by bolts. The mounting plate 2 is fixed to the side of the support frame 9, and the support plates 2 of the two support stands are arranged facing each other. The first positioning hole and the first fixing hole are both arranged on the mounting plate 2. Preferably, the plurality of first fixing holes are distributed in an arc shape. The arc-shaped first fixing holes allow the guide rail plate to be adjusted in its installation position along an arc path within a certain range. This design is particularly suitable for test scenarios that require simulation of different roll angles or trajectories, so that the test equipment can flexibly adapt to the needs of various roll angles. By selecting different fixing holes to install the guide rail plates, the angle and position of the test device can be easily changed to support the test requirements of vehicles of different types or sizes, which increases the diversity of the experimental settings and improves the versatility of the entire system. The arc-shaped layout helps to disperse the force applied to the support frame, making the entire structure more stable. By setting two arc-shaped first fixing holes, the guide rail plate and the support frame are ensured to be more stable.

[0051] The first positioning hole and the first fixing hole are both through holes, and the first positioning hole and the first fixing hole 21 are used to install the guide rail plate 3. A second positioning hole is set in the upper part of the guide rail plate 3, and multiple second fixing holes are symmetrically set on both sides. The upper part of the guide rail plate 3 is connected with the first positioning hole on the support frame through the second positioning hole bolt to achieve positioning, and the lower part is connected with the first fixing hole on the support frame through the second fixing hole bolt to complete fixing.

[0052] Guide rails are provided on the guide rail plates 3 of the two support stands, and slide blocks are slidably matched on the guide rails. Support holes are transversely provided on the slide blocks, and a first transmission shaft 13 is supported in the support holes. Both ends of the rotating arm 6 are fixedly connected to the first transmission shaft 13. A connecting member 4 is provided between the first transmission shaft 13 and the rotating arm 6, and a vehicle body fixing plate 7 is provided on the connecting member 4 for fixed connection with the test vehicle. A plurality of mounting holes are provided on the connecting member 4, and the plurality of mounting holes are arranged in sequence. In this embodiment, the number of the mounting holes is four. The first transmission shaft 13 is connected to the rotating device, and the slide block is connected to the lifting device.

[0053] The mounting holes include a first mounting hole and a second mounting hole. In the present embodiment, two first mounting holes and two second mounting holes are included. The first mounting hole is used to mount the rotating arm 6, and the second mounting hole is used to mount the first transmission shaft 13. The first mounting hole and the second mounting hole have the same structure. The rotating arm 6 extends into the first mounting hole and is fixed by bolts. The cross-section of the first transmission shaft 13 is T-shaped, and the T-shaped head extends into the second mounting hole and is fixedly connected to the connecting member 4, and the T-shaped tail is supported in the support hole of the slider by a bearing.

[0054] The rotating device includes a rotating motor 10, a second transmission shaft 12, and a third transmission shaft 11. The first transmission shaft 13 is connected to the second transmission shaft 12 through a universal joint, the second transmission shaft 12 is connected to the third transmission shaft 11 through a universal joint, and the third transmission shaft 11 is fixedly connected to the motor shaft of the rotating motor 10. The lifting device includes a lifting motor 15 and a screw mechanism 14. The motor shaft of the lifting motor 15 is fixedly connected to the screw of the screw mechanism 14, and the nut of the screw mechanism 14 is fixedly connected to the slider.

[0055] The screw mechanism 14 is equipped with a brake, which can be arranged at the end of the screw or in the lifting motor. In this embodiment, the brake is arranged at the end of the screw; the brake is an electromagnetic brake.

[0056] The number of the rotating device and the lifting device can be two sets, which are respectively arranged on two supporting frames, or one set of rotating device and one set of lifting device, the rotating device is arranged on one supporting frame, and the lifting device is arranged on the other supporting frame. In this embodiment, the number of the rotating device and the lifting device is one set for each, the supporting frame on one side is provided with the rotating device, the tail of the first transmission shaft 13 in the side slider 81 extends out of the slider 81, and is connected to the motor shaft of the rotating motor 10 through the second transmission shaft 12 and the third transmission shaft 11; the lifting device is arranged on the supporting frame on the other side, the side slider 8 is connected to the lifting device, the lifting motor 15 is installed on the top of the supporting frame on the side, and the screw mechanism is fixed on the mounting plate 2.

[0057] See also Fig. 9 , a rollover collision test method, specifically comprising the following steps:

[0058] S1: Determine the test configuration parameters according to the vertical speed of the test vehicle during the collision, the slide test acceleration, the slide test speed, the test vehicle rotation speed, and the collision angle required by the current test conditions of the rollover collision test, wherein the test configuration parameters include the test vehicle drop height, the rotating motor rotation speed, the slide launch time, the test vehicle drop time, the slide test waveform, and the guide rail plate installation angle;

[0059] When the installation angle of the guide rail plate is less than 15°, the falling height of the test vehicle has the following relationship:

[0060]

[0061] Where H1 is the drop height of the test vehicle when the guide plate installation angle is less than 15°, v z is the vertical velocity of the test vehicle, g is the acceleration due to gravity;

[0062] When the guide rail installation angle is greater than or equal to 15° and less than 25°, the falling height of the test vehicle has the following relationship:

[0063]

[0064] Where, the drop height of the test vehicle when the guide plate installation angle is greater than or equal to 15° and less than 25°, v z is the vertical velocity of the test vehicle, g is the acceleration of gravity, μ is the correction coefficient, and θ is the installation angle of the guide rail plate.

[0065] When the slide launches a sine wave, the slide launch moment satisfies the following relationship:

[0066]

[0067] Where T1 is the launch time of the sine wave slide, v z is the vertical velocity of the test vehicle, g is the acceleration of gravity, μ is the correction coefficient, θ is the installation angle of the guide plate, and σ is the period correction coefficient.

[0068] When the slide launches a trapezoidal wave, the slide launch moment satisfies the following relationship:

[0069]

[0070] Where T2 is the launch time of the trapezoidal wave slide, v z is the vertical speed of the test vehicle, a x is the sliding table test acceleration, v x is the test speed of the slide, g is the acceleration of gravity, μ is the correction coefficient, and θ is the installation angle of the guide rail plate.

[0071] The slide test waveform is a sine wave or a trapezoidal wave. The present embodiment uses a sine wave. The sine wave expression of the slide test waveform is as follows:

[0072]

[0073] In the formula, a x is the sliding table test acceleration, v x is the speed of the slide at time t, and t is the launch time.

[0074] In step S1, it also includes determining the installation positions of the first transmission shaft 13 and the rotating arm 6 on the connecting member 4 according to the vehicle model of the test vehicle. In this embodiment, there is an installation hole between the installation positions of the first transmission shaft 13 and the rotating arm 6.

[0075] In this embodiment, the required vertical speed of the test vehicle in the working condition is 6 m / s, the acceleration of the slip table test is 20 g, the speed of the slip table test is 50 km / h, the rotation speed of the test vehicle is 200° / s, and the collision angle is 0°;

[0076] The test configuration parameters calculated by the above method are successively the falling height of the test vehicle 1.8 m, the rotation speed of the rotating motor 200° / s, the slip table launch time 491 ms, the falling time of the test vehicle 0 ms, the slip table test waveform 200·sin(0.6945·t), 0 < t < 0.22, and the installation angle of the guide rail plate 0°.

[0077] S2: Set the installation angle of the guide rail plate 3 according to the test configuration parameters, bolt-connect the upper part of the guide rail plate 3 to the first positioning hole on the mounting plate 2 to achieve positioning, and fix the lower part to the corresponding first fixing hole 21 by bolts according to the requirements of the installation angle of the guide rail plate. Then fixedly connect the test vehicle to the rotating arm 6 and the vehicle body fixing plate 7 so that the test vehicle is stably installed on the support bench;

[0078] S3: Lift the test vehicle by the lifting device to make the height reach the falling height of the test vehicle, lock the lead screw mechanism 14 by the brake, and then start the rotating motor 10 to make the rotation speed of the rotating arm 6 reach the test rotation speed of the rotating arm;

[0079] S4: When the test rotation speed of the rotating arm reaches the requirements of the test configuration parameters, unlock the brake to release the rotating arm, so that the test vehicle falls along the guide rail, and then launch the slip table 1 according to the slip table test waveform by the slip table driving device 16 to make the test vehicle contact the slip table and roll and collide;

[0080] S5: Collect the test data and save it. The test data includes the vehicle body information after the test and the dummy data in the test vehicle.

[0081] The vehicle body information includes the roof intrusion amount, three-axis angular velocity, three-axis acceleration, and seat belt force. The dummy data includes the head, chest, and pelvis accelerations, neck force / moment, chest intrusion amount, spine force / moment, thigh force, knee displacement, calf force, and head angular velocity.

[0082] Embodiment 2

[0083] The difference between this embodiment and Embodiment 1 is that the slip table uses a trapezoidal wave, and the expression of the slip table test waveform is as follows:

[0084]

[0085] In the formula, Input(t) is the slide test waveform, t is the slide launch time, a x is the sliding table test acceleration.

[0086] In this embodiment, the vertical speed of the test vehicle is 6m / s, the acceleration of the slide test is 20g, the speed of the slide test is 50km / h, the speed of the test vehicle is 200° / s, and the collision angle is 0°. The test configuration parameters calculated by the above method are: the test vehicle drop height is 1.8m, the rotating motor speed is 200° / s, the slide launch time is 545ms, the test vehicle drop time is 0ms, the guide plate installation angle is 0°, and the slide test waveform is

[0087] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A rollover collision test bench, characterized in that: The invention comprises a base, two support frames, a slide (1), a slide drive device (16), a rotating device and a lifting device; the slide (1) is slidably matched on the base and driven by the slide drive device (16); the two support frames are fixed on the base and are respectively located on both sides of the slide (1); a rotating arm (6) is arranged between the two support frames for fixing the test vehicle; a first positioning hole is arranged on the upper part of the support frame, and a plurality of first fixing holes (21) are arranged on the lower part; the first positioning hole and the first fixing hole are used for installing a guide rail plate (3); a guide rail is arranged on the guide rail, and a slider is slidably matched on the guide rail; the rotating arm (6) is supported on the slider; the rotating arm (6) is connected to the rotating device; and the slider is connected to the lifting device.

2. The rollover collision test bench according to claim 1, characterized in that: The slider is laterally provided with a support hole, in which a first transmission shaft (13) is supported. The two ends of the rotating arm (6) are respectively fixedly connected to the first transmission shafts (13) of the two supporting stands and are supported on the slider through the first transmission shaft (13).

3. The rollover collision test bench according to claim 2, characterized in that: The rotating device comprises a rotating motor (10), a second transmission shaft (12), and a third transmission shaft (11); the first transmission shaft (13) is connected to the second transmission shaft (12) via a universal joint; the second transmission shaft (12) is connected to the third transmission shaft (11) via a universal joint; and the third transmission shaft (11) is fixedly connected to the motor shaft of the rotating motor (10).

4. The rollover collision test bench according to claim 2, characterized in that: A connecting piece (4) is arranged between the first transmission shaft (13) and the rotating arm (6), and a plurality of mounting holes are arranged on the connecting piece (4), and the mounting holes are used to mount the rotating arm (6) and the first transmission shaft (13).

5. The rollover collision test bench according to claim 1, characterized in that: The lifting device comprises a lifting motor (15) and a screw mechanism (14); the motor shaft of the lifting motor (15) is fixedly connected to the screw of the screw mechanism (14); and the nut of the screw mechanism (14) is fixedly connected to the slider.

6. A rollover collision test method, characterized in that: The specific steps include: S1: Determine the test configuration parameters according to the vertical speed of the test vehicle, the slide test acceleration, the slide test speed, the test vehicle rotation speed, and the collision angle required by the current working condition of the rollover collision test, wherein the test configuration parameters include the drop height of the test vehicle, the rotation speed of the rotating motor, the slide launch time, the drop time of the test vehicle, the slide test waveform, and the guide rail plate installation angle; S2: Set the guide rail panel installation angle according to the test configuration parameters and install the test vehicle on the support stand; S3: lift the test vehicle by the lifting device to a height that reaches the falling height of the test vehicle, and then start the rotating motor to make the rotating arm's rotation speed reach the rotating arm test speed; S4: Release the rotating arm to make the test vehicle fall down, and then launch the slide according to the slide test waveform through the slide drive device, so that the test vehicle contacts the slide and rolls over; S5: Collect and save test data, where the test data includes vehicle body information after the test and dummy data in the test vehicle.

7. The rollover collision test method according to claim 6, characterized in that: When the installation angle of the guide rail plate is less than 15°, the falling height of the test vehicle has the following relationship: Where H1 is the drop height of the test vehicle when the guide plate installation angle is less than 15°, v z is the vertical velocity of the test vehicle, g is the acceleration due to gravity; When the guide rail installation angle is greater than or equal to 15° and less than 25°, the falling height of the test vehicle has the following relationship: Where, the drop height of the test vehicle when the guide plate installation angle is greater than or equal to 15° and less than 25°, v z is the vertical velocity of the test vehicle, g is the acceleration of gravity, μ is the correction coefficient, and θ is the installation angle of the guide rail plate.

8. The rollover collision test method according to claim 6, characterized in that: The slide test waveform is a sine wave or a trapezoidal wave.

9. The rollover collision test method according to claim 8, characterized in that: When the slide launches a sine wave, the slide launch moment satisfies the following relationship: Where T1 is the launch time of the sine wave slide, v z is the vertical velocity of the test vehicle, g is the acceleration of gravity, μ is the correction coefficient, θ is the installation angle of the guide plate, and σ is the period correction coefficient.

10. The rollover collision test method according to claim 8, characterized in that: When the slide launches a trapezoidal wave, the slide launch moment satisfies the following relationship: Where T2 is the launch time of the trapezoidal wave slide, v z is the vertical speed of the test vehicle, a x is the sliding table test acceleration, v x is the test speed of the slide, g is the acceleration of gravity, μ is the correction coefficient, and θ is the installation angle of the guide rail plate.

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