Differenze

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

--- wikiffcd2023:start [2023/05/18 10:21] – [Sparse material] 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}},
-{{ :wikiffcd2022:monocoque_chassis_2022_v002.mud |v002}},
+{{ :wikiffcd2023:mococoque_chassis_2023_v002.mud |v002}},
-{{ :wikiffcd2022:monocoque_chassis_2022_v003.mud |v003}}((with respect to v002, i) I created the truss elements at the front right suspension, ii) I selected also the rotational dofs at the wheel assebly RBE2, and iii) I created the  ''__crash_absorber_support_area'' face set)),
+{{ :wikiffcd2023:mococoque_chassis_2023_v003.mud |v003}}
-{{ :wikiffcd2022:monocoque_chassis_2022_v003b.mud |}},
+{{ :wikiffcd2023:mococoque_chassis_2023_v004.mud |v004}}
-{{ :wikiffcd2022:monocoque_chassis_2022_v004.mud |v004}},
+{{ :wikiffcd2023:mococoque_chassis_2023_v005.mud |v005}}
-{{ :wikiffcd2022:monocoque_chassis_2022_v005.mud |v005}} ((with respect to v004, i) materials and geometric props are associated to the two truss elements that connect the sway bar to the wheel assemblies, ii) one of those trusses is selectively deactivated in the various jobs, iii) the max along layers eq. von Mises stres is asked as a result)),
-{{ :wikiffcd2022:monocoque_chassis_2022_v203.mud |v203}},
-{{ :wikiffcd2022:monocoque_chassis_2022_v203motions.mud |v203motions}},
-{{ :wikiffcd2022:monocoque_chassis_2022_v204.mud |v204}},
-{{ :wikiffcd2022:monocoque_chassis_2022_v205.mud |v205}},
-{{ :wikiffcd2022:monocoque_chassis_2022_v206.mud |v206}},
-{{ :wikiffcd2022:monocoque_chassis_2022_v207.mud |v207}}.
 {{ :wikiffcd2022:monocoque_chassis_2022_sway_bar_kit.mud |Sway bar kit}}.
 {{ :wikiffcd2022:monocoque_chassis_2022_inertial_elements_kit.mud |Inertial elements kit}}.
+For other models, refer to the ''~/_shared'' directory within ''x2go-cdm.ing.unimore.it''.
 ==== Properties ====
 **Suspension link trusses**
@@ Linea 144: / 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 153: / 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]].