This paper analyzes the structure of a roll bar installed on a Lancia Delta Integrale, with the aim of assessing whether the level of safety offered, in the presence of various external stresses, meets the requirements of FIA regulations. The system was simplified and modeled as a hyperstatic structure, solved using the force method, and analyzed with the support of Ftool software, useful for analyzing internal stresses. Critical conditions such as impacts and rollovers were also simulated by applying equivalent static loads. Strength and deformability tests highlighted the need to stiffen the structure, leading to the addition of additional rods. This resulted in a stiffer and safer final model. Since the study was limited to the static and two-dimensional domain, future developments propose the use of dynamic simulations and FEM optimization on the three-dimensional structure.
Il presente elaborato analizza la struttura di un roll bar installato in una Lancia Delta Integrale, con l’obiettivo di valutare se il livello di sicurezza offerto, in presenza di diverse sollecitazioni esterne rispetti i requisiti imposti dalla normativa FIA. Il sistema è stato semplificato e modellato come struttura iperstatica e risolto attraverso il metodo delle forze e analizzata con il supporto del software Ftool, utile per l’analisi delle sollecitazioni interne. Sono state inoltre simulate condizioni critiche come urti e ribaltamenti, applicando carichi statici equivalenti. Le verifiche di resistenza e deformabilità hanno evidenziato la necessità di irrigidire la struttura, portando all’aggiunta di aste supplementari così facendo il modello finale risulta più rigido e sicuro. Essendo che lo studio è stato limitato all’ambito statico e bidimensionale, per sviluppi futuri si propone l’uso di simulazioni dinamiche e ottimizzazione FEM sulla struttura tridimensionale.
Analisi e ottimizzazione di un Roll Bar per auto da rally
ZENARI, FABIO
2024/2025
Abstract
This paper analyzes the structure of a roll bar installed on a Lancia Delta Integrale, with the aim of assessing whether the level of safety offered, in the presence of various external stresses, meets the requirements of FIA regulations. The system was simplified and modeled as a hyperstatic structure, solved using the force method, and analyzed with the support of Ftool software, useful for analyzing internal stresses. Critical conditions such as impacts and rollovers were also simulated by applying equivalent static loads. Strength and deformability tests highlighted the need to stiffen the structure, leading to the addition of additional rods. This resulted in a stiffer and safer final model. Since the study was limited to the static and two-dimensional domain, future developments propose the use of dynamic simulations and FEM optimization on the three-dimensional structure.| File | Dimensione | Formato | |
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Zenari_Fabio.pdf
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https://hdl.handle.net/20.500.12608/98195