Abstract:
The significant fluctuation in bearing capacity remains a critical challenge to be addressed in thin-walled corrugated anti-impact energy-absorbing components. This study focuses on mitigating bearing capacity fluctuations by analyzing common issues and influencing factors in existing corrugated anti-impact energy-absorbing components. A lattice-type thin-walled corrugated anti-impact energy-absorbing component is designed, with optimization research conducted on its anti-impact performance.Through numerical simulation methods, this study investigates bearing capacity, stress distribution, and energy evolution patterns under parameters including corrugation structural characteristics, number of lattice unit cells, and wall thickness. An optimization objective function for the bearing capacity fluctuation coefficient is established, and a collaborative computational approach integrating MATLAB, Python, and Abaqus is proposed to optimize constant-resistance performance.The research results demonstrate:Corrugation structural characteristics significantly influence anti-impact performance. As the corrugation convexity-concavity ratio increases, both the peak bearing capacity and average bearing capacity decrease, while the bearing capacity fluctuation coefficient initially decreases and subsequently increases.Increasing the number of lattice unit cells elevates the peak bearing capacity. However, excessive unit cells promote stacking-induced large bending deformations, increasing the fluctuation coefficient. Reduced component height shortens the yield displacement stroke, diminishing energy absorption.Bearing capacity and energy absorption exhibit a linear increasing trend with wall thickness. Increased thickness negligibly affects yield displacement but gradually elevates bearing capacity, accompanied by a higher fluctuation coefficient.Optimized constant-resistance parameters reveal that under constant inner diameter width: increasing component width causes the peak bearing capacity and fluctuation coefficient to first decrease then increase, while the average bearing capacity initially decreases before gradually stabilizing.