Doppelpendel

Doppelpendel Animation

Dies ist das Matehmatica Notebook zu Teil d der Übungsaufgabe 10. Aus dem Kurs theoretische Physik I im WS08-09 bei Prof. Brandes von der Technischen Universität Berlin. Es geht um die numerische Berechnung eines Pendels in bestimmten Situationen. Vgl. Aufgabenstellung Im Anhang kann das Mathematica Notebook runtergeladen werden. Als erstes folgen Mathematicatechnische Vorbereitungen dann die eigentliche Berechnung.


Variables and Constants


Define a shortcut for φ

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Help Functions

Define some help functions and variables

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Names

First of all create a table with Definitions of Constants and Variables we want to use in the future.

First define the coulumn names

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Assign Numbers to the columns

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Define the Table

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Get this information to the Computer Algebra System

Attributes

Select variables/constants with defined attribute

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Assign attributes to variables / constants

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Assumptions

Select variables/constants with defined attribute

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Define Assumptions to the computer algebra system

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Names, Usage, Units

Define the names of "name" "usage" and "units"

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Assign the values as "properties" to the variables

First we define the cartesian product in the next step as a special case of a outer tensor product

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We define a list of the Tags

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And of its values

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Then we do the assignment

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Default Values

Select variables/constants with defined default value

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Assign values to variables / constants

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Define the DGL

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B

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D

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