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CN-122016333-A - Reliability bench test control method for integrated frame of double-steel-wheel road roller

CN122016333ACN 122016333 ACN122016333 ACN 122016333ACN-122016333-A

Abstract

The invention discloses a reliability bench test control method for an integrated frame of a double-steel-wheel road roller, which belongs to the technical field of double-steel-wheel road roller frame test and comprises the steps of obtaining simulated load data under a double-large vibration working condition based on simulated simulation calculation, inputting set load spectrum programming into a control system of an electrohydraulic servo actuator to realize the application of a cyclic load spectrum to the integrated frame, gradually lifting the cyclic load spectrum to a target load level, recording dynamic strain time history, displacement change and acceleration response of key measuring points in a endurance test process, and obtaining periodic damage detection records by online monitoring damage, and finally evaluating fatigue damage, endurance limit and structural reliability of the integrated frame by combining a fatigue damage accumulation theory. The invention has good universality and adaptability, can simulate the vibration load spectrum of the frame based on the cooperative single-shaft loading of the front/rear double actuators, and can reproduce the vibration compaction working conditions of the front and rear double steel wheels of the road roller in the time domain, thereby realizing process prediction and optimization.

Inventors

  • ZHANG XUEJIAN
  • Qian Yintong
  • WANG CAN
  • JIANG YOULIANG

Assignees

  • 江苏徐工工程机械研究院有限公司

Dates

Publication Date
20260512
Application Date
20260123

Claims (10)

  1. 1. The test control method for the reliability bench of the integrated frame of the double-steel-wheel road roller is characterized by being realized based on a bench test device, wherein the bench test device comprises an integrated frame, the integrated frame comprises a front frame (1) and a rear frame (2), the front frame (1) and the rear frame (2) are connected through a hinging device (3), the front frame (1) and the rear frame (2) are respectively connected with a bench platform (4) through a front electrohydraulic servo actuator and a rear electrohydraulic servo actuator, and the test control method for the reliability bench of the integrated frame of the double-steel-wheel road roller comprises the following steps: combining the bearing condition of each part of the integrated frame, and obtaining simulation load data under the double large vibration working conditions based on simulation calculation; According to the simulated load data, a set load spectrum program is input into a control system of the electro-hydraulic servo actuators so as to realize that at least one electro-hydraulic servo actuator applies a cyclic load spectrum to the integrated frame; Gradually lifting a cyclic load spectrum to a target load level in a grading loading mode, maintaining the target load level for a endurance test, recording dynamic strain time histories, displacement changes and acceleration responses of key measuring points on the integrated frame in the endurance test process, and performing online monitoring on damage to obtain periodic damage detection records; based on dynamic strain time history, displacement change, acceleration response and periodic damage detection record, and by combining a fatigue damage accumulation theory, the fatigue damage, durability limit and structural reliability of the integrated frame are finally evaluated.
  2. 2. The method for controlling the reliability bench test of the integrated frame of the double-steel-wheel road roller according to claim 1, wherein before the electrohydraulic servo actuator applies a cyclic load spectrum to the integrated frame, the spatial pose of the integrated frame is controlled and adjusted, so that the longitudinal symmetry plane of the integrated frame coincides with the central axis of the bench platform (4), and the hinge centers of the front frame (1) and the rear frame (2) are coplanar with the force application axis of the electrohydraulic servo actuator.
  3. 3. The method for controlling the reliability bench test of the integrated frame of the double-steel-wheel road roller according to claim 2, wherein the step of controlling and adjusting the spatial pose of the integrated frame comprises the steps of firstly adjusting the spatial pose of the integrated frame through a pose adjusting system of an electrohydraulic servo actuator, and then carrying out spatial six-degree-of-freedom precise measurement by assisting a laser total station to finely adjust the spatial pose of the integrated frame.
  4. 4. The method for controlling the reliability bench test of the integrated frame of the double steel wheel road roller according to claim 1, wherein the method is characterized in that before the cyclic load spectrum is applied to the integrated frame, the sweep frequency preload is applied to the integrated frame, the main natural frequency, the damping ratio and the vibration mode of the integrated frame are identified, and the excitation frequency of the cyclic load spectrum is adjusted according to the main natural frequency, the damping ratio and the vibration mode.
  5. 5. The method for controlling the reliability bench test of the integrated frame of the double-steel-wheel road roller is characterized in that the determination of the key measuring points comprises the steps of identifying a high-stress area and a potential stress concentration point on the integrated frame based on simulation, then planning stress/strain key measuring points on the integrated frame, and detecting dynamic strain time history, displacement change and acceleration response through a strain sensing unit, a laser displacement sensor and a triaxial ICP acceleration sensor arranged on the key measuring points.
  6. 6. The method for controlling the reliability bench test of the integrated frame of the double-steel-wheel road roller according to claim 1, wherein the double-large-vibration working condition comprises the following steps: The first working condition is that the amplitude of exciting force is 80 kN and the vibration frequency is 45 Hz; The second working condition is that the amplitude of exciting force is 50 kN and the vibration frequency is 60 Hz; And (3) working condition III: the working condition I and the working condition II are alternately and circularly carried out according to a certain time sequence, and static load is inserted in the middle.
  7. 7. The integrated frame reliability bench test control method of the double-steel-wheel road roller, as set forth in claim 1, characterized in that the front frame (1) is connected with a front frame left side plate (5) and a front frame right side plate (6), the front frame left side plate (5) is connected with the front frame right side plate (6) through a front frame transverse fixing plate (7), the rear frame (2) is connected with a rear frame left side plate (8) and a rear frame right side plate (9), the rear frame left side plate (8) is connected with the rear frame right side plate (9) through a rear frame transverse fixing plate (10), and the front frame transverse fixing plate (7) and the rear frame transverse fixing plate (10) are respectively connected with the bench platform (4) through a front electro-hydraulic servo actuator and a rear electro-hydraulic servo actuator.
  8. 8. The integrated frame reliability test control method of the double steel wheel road roller, as set forth in claim 7, characterized in that a front frame left vibration side guard plate (101) and a front frame right vibration side guard plate (102) are arranged on the front frame (1), the front frame left vibration side guard plate (101) is connected with the front frame left side plate (5) and the front frame right vibration side guard plate (102) is connected with the front frame right side plate (6) through threaded holes, a rear frame left vibration side guard plate (201) and a rear frame right vibration side guard plate (202) are arranged on the rear frame (2), and the rear frame left vibration side guard plate (201) is connected with the rear frame left side plate (8) and the rear frame right vibration side guard plate (202) is connected with the rear frame right side plate (9) through threaded holes.
  9. 9. The integrated frame reliability bench test control method of double steel wheel road rollers as set forth in claim 7, wherein the front frame left side plate (5) and the front frame right side plate (6) are connected with the front frame transverse fixing plate (7) through threaded holes, and the rear frame left side plate (8) and the rear frame right side plate (9) are connected with the rear frame transverse fixing plate (10) through threaded holes.
  10. 10. The method for controlling the reliability bench test of the integrated frame of the double steel wheel road roller as set forth in claim 7, wherein a front connecting seat (701) is arranged at the central position of the front frame transverse fixing plate (7), the connecting seat (701) is connected with the front electro-hydraulic servo actuator, a rear connecting seat (1001) is arranged at the central position of the rear frame transverse fixing plate (10), and the rear connecting seat (1001) is connected with the rear electro-hydraulic servo actuator.

Description

Reliability bench test control method for integrated frame of double-steel-wheel road roller Technical Field The invention relates to a control method for a reliability bench test of an integrated frame of a double-steel-wheel road roller, and belongs to the technical field of double-steel-wheel road roller frame test. Background Along with the accelerated layout of the country to the high-quality development of the manufacturing industry transformation upgrading and key industry chains, the integrated forming technology has become a research hotspot in the manufacturing industry. The integrated forming is a process of realizing one-time near-net forming of the whole part through integrated design and integrated manufacturing, and is first applied to the industries of automobiles, electronics and the like. In the engineering machinery industry, the small-batch customized production mode is particularly suitable for the technical characteristics of integrated forming. The integrated forming of the double-steel-wheel road roller frame based on sand mold gravity casting can effectively realize the simplification of the manufacturing process, the improvement of the production efficiency and the improvement of the forming precision, and has wide development prospect. However, the integrated frame of engineering machinery is a great difficulty in reliability evaluation and detection due to the characteristics of large outline, complex structure and the like. In the prior art, the conventional testing method for the double-steel-wheel road roller frame is based on a three-direction vibration platform or a road roller running-in experiment table for vibration or road condition simulation test, and the two methods are high in test cost because a specific platform needs to be built, the former method is complex in test, a large number of tools need to be prepared and installed for multiple times, and the latter method needs to be verified by a whole vehicle loader and cannot simulate double-large-vibration working conditions. The prior art has the following defects that 1, the field is blank, the prior patent layout is highly concentrated in the automobile industry (such as a rear suspension, an auxiliary frame and the like), and the related patents of rack testing of frames in the field of engineering machinery mainly relate to a mixer truck, an agricultural machinery chassis, a universal engineering frame or a transmission system, and particularly the blank exists in a device and a method for testing the reliability of the frame of special equipment, namely a double-steel-wheel road roller. The frame of the double-steel-wheel road roller is complex in structure, the stress mode of the frame is different from that of a traditional truck frame or a frame with a simple beam structure, and in addition, compared with huge market and strict regulation requirements in the automobile industry, the road mechanical fields of the road roller and the like are relatively subdivided, so that the testing technology is relatively lagged. 2. The device has poor universality and adaptability, and the existing bench devices (such as CN 202411401517.1) are modularized, but the device generally has lack of universality aiming at specific vehicle types. The fixture and actuator mounting points of the traditional bench are fixed, so that products with different tonnages cannot be quickly and conveniently adapted, in addition, the modularization concept is lacking, and the requirements of platformization and serialization are not considered in the early design stage, so that new products need to be redesigned in the development of new products. 3. The evaluation system is lagged, and the process prediction and optimization cannot be realized, wherein the traditional reliability test mainly depends on macroscopic detection (such as visual crack and flaw detection) after the test to judge whether the failure occurs, belongs to post-evaluation, and cannot realize real-time monitoring in the experimental process. The method is mainly characterized in that the links of test and evaluation are isolated due to insufficient data utilization, and online monitoring and early warning in the experimental process cannot be realized. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a method for controlling the reliability bench test of the integrated frame of the steel-wheel road roller, which has good universality and adaptability, can simulate the vibration load spectrum of the frame based on the cooperative uniaxial loading of the front/rear double actuators, and can reproduce the vibration compaction working conditions of the front and rear double steel wheels of the road roller in a time domain, thereby realizing process prediction and optimization. In order to solve the technical problems, the invention adopts the following technical scheme: The utility model provides a two steel wheel road roller