Differenze

Queste sono le differenze tra la revisione selezionata e la versione attuale della pagina.

--- wikiffcd2025:start [2025/05/20 09:00] – [Lecture Notes] ebertocchi
+++ wikiffcd2025:start [2025/06/05 21:22] (versione attuale) – [Lecture Notes] ebertocchi
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 ===== Lecture Notes =====
-{{ :wikiffcd2025:ffcd_mscm_lecture_notes_v20250520b.pdf |Lecture notes}}, provisional updated version.
+{{ :wikiffcd2025:ffcd_mscm_lecture_notes_v20250605a.pdf |Lecture notes}}
+, provisional updated version.
-{{ :wikiffcd2025:ffcd_mscm_exam_formulary_v20250225a.pdf |Exam formulary example}}.
+{{ :wikiffcd2025:ffcd_mscm_formulary_v20250606a.pdf |Exam formulary}}.
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 </hidden>
+==== 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]].