EVALUATION OF LOCAL HUMPS AND A NEW HUMP DESIGN | ||||
The International Conference on Applied Mechanics and Mechanical Engineering | ||||
Article 6, Volume 12, 12th International Conference on Applied Mechanics and Mechanical Engineering., May 2006, Page 526-539 PDF (309.4 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/amme.2006.41369 | ||||
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Authors | ||||
Younes Y. K.1; El Demerdash S. M.2; S. M., Rabeih El Adl3; Hani S. S.4 | ||||
1Professor, Mechanical Design Department, Helwan University – Faculty of Engineering – Mataria. | ||||
2Professor., Automotive Engineering Department, Helwan University – Faculty of Engineering – Mataria. | ||||
3Associate Prof, Mechanical Design Department, Helwan University – Faculty of Engineering – Mataria. | ||||
4Graduate Student, Mechanical Design Department, Helwan University – Faculty of Engineering – Mataria. | ||||
Abstract | ||||
ABSTRACT The number of speed humps (sleeping policemen) in many countries has been increased steadily in the last decades. In this paper, the problem of installing nonspecified road humps in Cairo city has been studied. A simple measuring technique has been constructed to measure hump profiles at different zones in Cairo. Evaluation of the humps has been discussed based on the dynamic response of crossing vehicles. This evaluation shows that road humps are randomly installed depending on resident requirements which satisfy safety in their neighborhoods. Many of these humps may cause vehicle damages and driver discomfort; therefore, optimizing an ideal hump becomes one of the traffic control requirements. Optimized hump dimensions for a new hump shape is introduced. The extreme acceleration of the driver’s seats of a truck and a passenger car is set as a multi objective function for the optimization process. The road-holding ability represented by the tire lift-off speed has been taken into consideration. The optimal calculations are based on Genetic Algorithm (GA) for its advanced searching ability. The results showed that, optimized humps are favorable than the current local and standard humps for both passenger cars and trucks. | ||||
Keywords | ||||
Road humps; Speed Control; Vehicle dynamics; vehicle suspension; global optimization; Ride comfort; road-holding ability; ground clearance | ||||
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