Reliability Analysis of Collision Energy Absorption for Anti-climber Devices Based on Improved Sum of Sine Surrogate Model

Abstract

Objective To reasonably evaluate the energy absorption reliability index of anti-climber devices, a reliability analysis method based on ISSSM (improved sinusoidal and surrogate model) is proposed. Method Firstly, a finite element model for anti-climber device collision is established. Secondly, the rationality of the finite element simulation model is verified based on the collision test data of the anti-climber device. Then, based on the principles of sum of sine function construction, the basic form of the force-displacement function for the anti-climber device collision process is clarified. According to the energy absorption consistency criterion, the anti-climber device energy absorption ISSSM is constructed. Combining reliability theory, a reliability analysis model for anti-climber device energy absorption is established. Finally, a specific model of anti-climber device is studied, and its energy absorption reliability index is evaluated. Result & Conclusion The constructed energy absorption ISSSM can reasonably reproduce the mechanical characteristics of the anti-climber device collision energy absorption process. When the coefficient of variation increases from 0.05 to 0.1, the energy absorption reliability index decreases from 3.07 to 1.53.

Keywords

• rail vehicle
• anti-climber
• collision
• reliability
• sum of sine function
• optimization