On „VZN" damper behaviour at crash

• Autorzy: Niculescu A. -I. , Jankowski A. , Gardulski J.
• Języki publikacji: EN

Abstrakty

EN

Passive security at crash is an importami problem both for road, and aerial vehicles, first case at horizontal collision and second at vertical one, on landing operation on ground or deck. Both generate human and material injuries, many of them with important negative effects. Damper in bumper a known solution for vehicles protection at crash is realized with different damping devices, from passive elements to actuators. Usually the devices are tuned for 5 km/h crash speed and after collision the passive solutions destroy and must be replaced with other new devices. The solutions using standard shock absorbers and actuators are improper the first dissipating insufficient energy and actuators being more expensive and having a long reaction time so the damping coefficient changing is realized in too low steps. VZN damper concept granted with European Patent EP l 190 184 and Romanian Patent RO l 18546, characterized by progressive damping coefficients with the stroke assures protection at crash, due to its capacity to realize constant damping force without mechanisms and electronics, tuning damping characteristic to this desiderate. The paper presents the differences between the energy must to be dissipated at the same crash speed in horizontal and vertical situation, it being increased at vertical situation, due to the gravity. The same paper evaluates the advantages confers by VZN damper concept comparative to standard one, for both vertical and horizontal collision and concludes the VZN one is better 39% at vertical crash and 25% at horizontal crash comparative to standard one, due to its efficient dissipating system.

Słowa kluczowe

EN

progressive damping; VZN; simulation; crash; passenger protection; body protection

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 3
• Strony: 321--326
• Opis fizyczny: Bibliogr. 3 poz., rys.

Twórcy

autor

Niculescu A. -I.

autor

Jankowski A.

autor

Gardulski J.

• Romanian Academy, Institute of Solid Mechanics Constantin Mille Street 75, 010141, Sector 7, Buchares, Romania tel: [phone],fax: [phone],

Bibliografia

• [1] Niculescu, A. I., Jankowski, A., Gardulski, J., Sireteanu, T., VZN damper concept application for passive security increasing, European EAEC Congress, Budapest 2010.
• [2] Niculescu, A. I., Jankowski, A., Sireteanu, T., On VZN damper behaviour at crash, Journal of KONES Powertrain and Transport, Vol. 16, No. 2, Warsaw 2009.
• [3] Niculescu, A. I., Alexandru, C., Jankowski, A., A solution for crash and high ground uneveness effect reducing, Journal of KONES Powertrain and Transport, Vol. 15, No. 3, Warsaw 2008.