Modeling and evacuation simulation of asymmetric attraction-repulsion mechanism of companion group based on Morse potential function
<p dir="ltr">To address the limitations of the traditional social force model in effectively characterizing companion group behavior with leader-follower relationships and their asymmetric interactions during pedestrian evacuation simulations, this paper proposes an improved social f...
Spremljeno u:
| Glavni autor: | |
|---|---|
| Izdano: |
2025
|
| Teme: | |
| Oznake: |
Dodaj oznaku
Bez oznaka, Budi prvi tko označuje ovaj zapis!
|
| Sažetak: | <p dir="ltr">To address the limitations of the traditional social force model in effectively characterizing companion group behavior with leader-follower relationships and their asymmetric interactions during pedestrian evacuation simulations, this paper proposes an improved social force model based on the Morse potential function. The enhanced model aims to provide a more realistic depiction of asymmetric attraction-repulsion mechanisms within such groups. <a href="" target="_blank">By introducing the Morse potential function, </a>a <a href="" target="_blank">segmented force field model</a> is constructed, which can differentially characterize the interaction between leaders and followers: strong repulsion within a very short distance to prevent collisions, maintaining weak attraction at a medium distance to maintain group cohesion, and enhancing attraction at a long distance to prevent dispersion. Comparative experiments conducted on a Python simulation platform within bidirectional pedestrian flow channels and obstacle scenarios demonstrated that, compared to traditional symmetric potential function models (such as the exponential repulsive potential), the Morse potential function model exhibits superior behavioral authenticity in simulating companion groups: the velocity fluctuations of leaders are significantly reduced, resulting in more stable behavior; followers demonstrate enhanced dynamic adaptability and recovery capability; and the velocity variations within the group display distinct asymmetric characteristics, which better align with the kinetic behavior of role differentiation observed in actual evacuation scenarios. This study validates the feasibility and effectiveness of the Morse potential function in crowd evacuation simulations, thereby providing a theoretical foundation and simulation tool support for emergency management, evacuation guidance strategy development, and passageway optimization design in public spaces such as subway stations.</p> |
|---|