wikifemfuchde2019:lez_2019-05-20
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wikifemfuchde2019:lez_2019-05-20 [2019/05/20 13:45] – ebertocchi | wikifemfuchde2019:lez_2019-05-20 [2019/05/28 06:25] (versione attuale) – ebertocchi | ||
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+ | mentat2013.1 -ogl -glflush | ||
+ | |||
+ | ---- | ||
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+ | Inertia relief and dynamic loadcases theory | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | ---- | ||
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+ | Embodiment of the vector shape functions constituting | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | ---- | ||
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+ | ***FSAE-like chassis*** | ||
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+ | model at the end of the previous lesson | ||
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+ | {{ : | ||
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+ | |||
+ | **Inertial elements** | ||
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+ | {{ : | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | |||
+ | ---- | ||
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+ | model as at the end of today' | ||
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+ | {{ : | ||
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+ | ---- | ||
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+ | ** Notes: ** | ||
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+ | The pedagogical model proposed does **not** include sway/ | ||
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+ | In particular, torsional stiffness should be evaluated in both the limiting cases of | ||
+ | * rigid springs, disconnected sway bars; | ||
+ | * disconnected springs, rigid sway bar. | ||
+ | |||
+ | This second loadcase, which is usually neglected, is however relevant for sizing the sway bar support areas on the chassis structure. | ||
+ | |||
+ | ==== Loadcases ==== | ||
+ | |||
+ | * Static test: torsional stiffness; | ||
+ | * preliminary suspension stroke motion test ({{: | ||
+ | * rigid spring or rigid anti-roll bar? | ||
+ | * Front, right wheel bump loadcase (inertia relief); | ||
+ | * Frontal crash absorber collapse loadcase (inertia relief); at the element faces belonging to the '' | ||
+ | * Dynamic modal response; | ||
+ | * Dynamic | ||
+ | |||
+ | ==== Connectors ==== | ||
+ | RBE3 link kinematics, in a nutshell: | ||
+ | * in the standard configuration, | ||
+ | * a $q_i$ weight is associated to each $P_i$ node of the distribution, | ||
+ | * the C centroidal node rigidly roto-translates with the distribution COG. G; | ||
+ | * the distribution COG. G translational motion is defined by the weighted average $P_i$ nodes translations; | ||
+ | * the distribution COG. G rotational motion is defined based on the momentum of the $P_i$ nodes translations. | ||
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+ | {{: | ||
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+ | {{: | ||
wikifemfuchde2019/lez_2019-05-20.txt · Ultima modifica: 2019/05/28 06:25 da ebertocchi