نوع مقاله : مقاله علمی
عنوان مقاله English
نویسندگان English
Inertial loads play an important role in structural design of Multirotors in vertical take-off of Recreational Manned-multirotor. In this paper a star layout for the support structure of motors and cabin of a manned recreational multirotor has been introduced. First the stress levels has been evaluated due to the maximum trust of motors using static finite element modeling. Afterward, time-dependent dynamic effects of applied motor loads have been investigated in take-off and Pull-up maneuvers on internal stresses using nonlinear dynamic finite element analysis. The effects of the pull-up maneuver as the most severe maneuver for this recreational multirotor have been studied within symmetric and unsymmetric conditions. The finite element results show that proper restrain of motors and inertial loads by the star layout leads to reduction of stress in unsymmetrical rather than symmetric pull-up maneuver. Moreover, performed frequency analysis in flight boundary conditions shows adequacy of the proposed star layout structure in the manner of natural frequency and motor working frequency (6.23 to 21.6 Hz).
کلیدواژهها English
علم و فناوری در مهندسی مکانیک