A Fatigue Life Analysis Method for Metal Parts of Subway Rail Vibration Absorber
A fatigue life analysis and rail shock absorber technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of inaccurate fatigue assessment, affecting development efficiency, dragging down product development cycle, etc., saving time and resource cost, the reliability of analysis results is good, and the effect of reducing the product development cycle
Active Publication Date: 2018-06-12
ZHUZHOU TIMES NEW MATERIALS TECH
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Problems solved by technology
However, the current fatigue life evaluation method has the following disadvantages: 1. Structural optimization is limited: because it is very dependent on the product structure that has been mature before, in the process of structural optimization of the rail shock absorber, only dare to make local detail modifications, and cannot fully utilize it. developer creativity
2. Fatigue assessment is inaccurate: Using experience or static strength check methods to evaluate the fatigue life of products has great inaccuracy and no specific criteria for judging
3. Fatigue experiment is time-consuming and labor-intensive: Although the accuracy of the trial-produced sample is very high, it takes a lot of time and labor costs. The fatigue experiment also requires a lot of financial support, and it is only suitable for orders with looser delivery times. The product
4. Affect development efficiency: Existing methods drag down the product development cycle and affect the development efficiency of developers
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[0024] Such as figure 1 As shown, the steps of the fatigue life analysis method of the metal parts of the subway rail shock absorber of the present embodiment include:
[0025] 1) Create a three-dimensional geometric model of the subway track damper; the three-dimensional geometric model of the subway track damper is relatively complex, especially the rubber part has many curved surfaces, which brings difficulty to mesh division. In this embodiment, step 1 ) to create a 3D geometric model of the subway track damper, including the steps of local structural simplification for the rubber part of the subway track damper, the detailed steps include removing the chamfer of the rubber part of the subway track damper that does not affect the force , arcs and holes. Through the above steps of local structure simplification, the three-dimensional geometric model of the subway rail shock absorber can be simplified, thereby simplifying the subsequent analysis process and improving the ef...
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The invention discloses a fatigue life analysis method of a metal component of an underground rail absorber. The fatigue life analysis method comprises the following steps: creating a three-dimensional geometric model of the underground rail absorber, and carrying out mesh generation to generate a finite element mesh model; adopting finite element analysis software to carry out a static analysis operation under a fatigue load, importing a calculation result into fatigue analysis software, extracting a metal mesh unit part, setting the material mechanical parameter and the surface roughness of the metal component of the underground rail absorber, carrying out fatigue cyclic load setting, and inputting a fatigue life cycle; and carrying out fatigue analysis to obtain a fatigue FOS (Factor Of Strength) and predict a fatigue life, and judging whether the metal component meets metal fatigue requirements. The fatigue life analysis method can verify whether the metal component of the underground rail absorber can meet fatigue life requirements or not when the underground rail absorber is under a fatigue load function for a long time, shortens a product development period, saves time and experiment cost and is convenient and reliable in analysis.
Description
technical field [0001] The invention relates to a fatigue life analysis technology of a structural part of a rail transit system, in particular to a method for analyzing the fatigue life of a metal part of a subway rail shock absorber. Background technique [0002] During the driving process of the rail transit system, due to the collision between the wheels and the rails, vibration shock and noise will be generated. The vibration shock waves will propagate in the tracks, tunnels, soil layers and ground buildings, and will be further excited to generate corresponding vibrations, which will cause serious damage to the surrounding environment. Adverse effects, and the track damper under the rail is used to offset the dynamic load during the operation of the vehicle, reducing vibration, shock and noise. Therefore, the bearing capacity and durability of the rail shock absorber are particularly important. In the long-term actual operation process, it is found that more than 80% ...
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IPC IPC(8): G06F17/50
Inventor 夏亮黄友剑林胜荣继刚周炜葛琪
Owner ZHUZHOU TIMES NEW MATERIALS TECH