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Expression Syntax for force torque:

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simphysoftwares edited this page Mar 12, 2021 · 1 revision

input syntax

Each component of force can be set as a valid mathematical expression with following allowed operators and variables,

Operators: plus minus(+ -), product (*), division(/), power (^)

Variables: e, pi, instantaneous time (t), speed(v), velocity components (v_x, v_y), coordinates (x, y) of the body on which force is applied.

Functions: All trigonometric and inverse functions like sin, cos etc and algebraic functions such as sqrt, exp etc

Variables are automatically updated to their instantaneous values before applying force in every step.

Example:

Force given to block is sin(x)i+ej. The corresponding motion can be analyzed or predicted as below. Look at the variation of force with x.

Example input

Similarly, in order to simulate harmonic oscillation along the x axis with force constant k and damping coefficient b on the body, set force's x component as k*x-b *v_x and forces's y component as 0.

F= (k*x-b *v_x)i (also make sure either gravity is zero or object is placed on smooth platform)

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Table of Contents

Getting Started With SimPHY

  1. Introduction to SimPHY
  2. Working Environment
  3. Navigation Panel and buttons
  4. Opening Mechanics Module
  5. Creating bodies: Basic
  6. Creating Joints: Basic
  7. Creating Miscellaneous Joints
  8. Creating Miscellaneous Bodies
  9. Body Properties and Grid Functioning
  10. Opening Object property editor
  11. Creating First simulation
  12. Editing world UI

Basic Visualisation

  1. Free Body Diagram
  2. Tracer and Ghosting
  3. Camera and Graph tool

Making Simulations Interactive

  1. Adding sliders and checkbox
  2. Using Slider
  3. Body property and toggle controller

Adding Forces and Fields

  1. How to apply Force
  2. Point of Application of Force
  3. Apply torque and Remove force or torque
  4. Syntax for force or torque
  5. Field Forces
Circuit Module
Optics Module
Geometry Module
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