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--- wikiffcd2023:start [2023/05/18 11:13] – [A Phoney monocoque chassis] ebertocchi
+++ wikiffcd2023:start [2023/06/06 13:39] (versione attuale) – [How to set a damped response] ebertocchi
@@ Linea 46: / Linea 46: @@
 Models:
 {{ :wikiffcd2022:monocoque_chassis_2022_v001.mud |v001}},
-{{ :wikiffcd2023:mococoque_chassis_2023_v002.mud |}}
+{{ :wikiffcd2023:mococoque_chassis_2023_v002.mud |v002}},
+{{ :wikiffcd2023:mococoque_chassis_2023_v003.mud |v003}}
+{{ :wikiffcd2023:mococoque_chassis_2023_v004.mud |v004}}
+{{ :wikiffcd2023:mococoque_chassis_2023_v005.mud |v005}}
 {{ :wikiffcd2022:monocoque_chassis_2022_sway_bar_kit.mud |Sway bar kit}}.
@@ Linea 134: / Linea 137: @@
 </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 =====
@@ Linea 143: / Linea 154: @@
 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]].