Entrambe le parti precedenti la revisioneRevisione precedenteProssima revisione | Revisione precedente |
wikiffcd2023:start [2023/05/22 17:18] – [A Phoney monocoque chassis] ebertocchi | wikiffcd2023:start [2023/06/06 13:39] (versione attuale) – [How to set a damped response] ebertocchi |
---|
| |
</hidden> | </hidden> |
| |
| ==== Notes on the imposed disps, harmonic response ==== |
| xxxxx |
| ===== Buckling ===== |
| [[https://en.wikipedia.org/wiki/Euler%27s_critical_load|Buckling what?]], |
| {{ :wikiffcd2023:euler_beam_buckling_2023_noplv.wxmx |}} |
| [[https://cdm.ing.unimo.it/dokuwiki/wikifemfuchde2020/buckling|link to the FFCD 2020 course]] |
| |
===== Sparse material ===== | ===== Sparse material ===== |
| |
| |
RBE3 connector: {{ :wikipaom2015:cinematica_rbe3_v1.pdf | kinematics}}, {{ :wikifemfuchde2020:rbe3.pdf | moment distribution}}; RBE2 vs. RBE3 demonstrator {{ :wikipaom2019:dimostratore_rbe2_vs_rbe3.mud | model}}, {{:wikitelaio2016:rbe2vsrbe3_2_.jpg?linkonly|screenshot}}. | RBE3 connector: {{ :wikipaom2015:cinematica_rbe3_v1.pdf | kinematics}}, {{ :wikifemfuchde2020:rbe3.pdf | moment distribution}}; RBE2 vs. RBE3 demonstrator {{ :wikipaom2019:dimostratore_rbe2_vs_rbe3.mud | model}}, {{:wikitelaio2016:rbe2vsrbe3_2_.jpg?linkonly|screenshot}}. |
| |
| ==== Dynamics related stuff ==== |
| |
| ** On the relevance of constraining in dynamic analyses ** |
| [[https://www.youtube.com/watch?v=0GEj69NANc8|back view]] [[https://www.youtube.com/watch?v=RihcJR0zvfM|side view]] relevance of (improper) constraints on the dynamic behaviour of a structure. |
| Design is reliable in actual operational conditions ([[https://en.wikipedia.org/wiki/Boeing_CH-47_Chinook|link]]). |
| Added constraints stiffen up the structure, thus increasing natural frequencies. |
| However, a 0 Hz rigid body mode natural frequency may rise to a finite value due to added positioning constraints; the associate natural mode may be excited in resonance by dynamic loads. |
| |
| **Poor man dynamic response animated view** |
| |
| {{ :wikialtro2018:animacomp.proc | MSC.Mentat procedure for creating poor man harmonic response animations}} |
| |
| {{ :wikifemfuchde2019:animamodipropri.proc | MSC.Mentat procedure for creating poor man natural mode animations}} |
| |
| |
| **Structural damping references** |
| |
| |
| {{ :wikipaom2017:structural_damping_values_jdstevenson.pdf |}} |
| |
| {{ :wikipaom2017:damping_cross-reference_and_material_properties.pdf |}} |
| |
| {{ :wikipaom2017:f_orban_damping_of_materials_and_members_in_structures.pdf |}} |
| |
| {{ :wikipaom2017:tom_irvine_damping_in_bolted_and_welded_joints.pdf |}} |
| |
| {{ :wikipaom2017:estratto_afwal-tr-84-3089v2_dampingvalues.pdf |estratto}} vol. 2, sezione 8 di Soovere, J., and M. L. Drake. Aerospace Structures Technology Damping Design Guide.LOCKHEED-CALIFORNIA CO BURBANK, 1985. |
| |
| ===== Exam turn schedules ===== |
| See [[restricted:turni_esame_pt_pasm_paom|PT, PAOM, PASM, FFCD Exam schedules]]. |