Shock absorber

| C |
in the palette on the schematic
The block is designed to simulate a translatory shock absorber, which includes viscoelastic forces and the breakaway friction force. The block includes the following blocks:

Inputs

Name Description Connection line type
C Port for connecting a conditionally fixed case (case) Translatory mechanics
R Port for connecting a conditionally movable rod (rod) Translatory mechanics

Outputs

None.

Properties

Name Parameter Description By default Data type
Spring Group of properties that set the characteristics of the spring
Spring constant, N/m K Spring constant 1 Вещественное
Initial compression, m S0 Initial compression of the spring at zero positions of the bodies on the block ports. Negative value sets the pre-stretch 0 Вещественное
Damper Group of properties that define the damper characteristics
Damping factor, N·s/m D Damping factor 0.1 Вещественное
Friction Group of properties that define the characteristics of friction
Breakaway speed,​m/s Vth The threshold value of the speed below which the value of the friction force is reduced to achieve the stability of the numerical solution 0.001 Вещественное
Breakaway friction force, N Fbrk Breakaway friction force 2 Вещественное
Dry (coulomb) friction force, N Fc Dry (coulomb) friction force 1 Вещественное
Damp ratio, s/m C Damp ratio 1 Вещественное
Stops Group of properties that set the characteristics of the stopper
Position of the upper stop, m Sup Position of the upper stop 0.1 Вещественное
Position of the lower stop, m Slow Position of the lower stop -0.1 Вещественное
Stiffness factor of the upper stop, N/m Kup Stiffness factor of the upper stop 1000000 Вещественное
Stiffness factor of the lower stop, N/m Klow Stiffness factor of the lower stop 1000000 Вещественное
Damping factor of the upper stop, N·s/m Dup Damping factor of the upper stop 0.01 Вещественное
Damping factor of the lower stop, N·s/m Dlow Damping factor of the lower stop 0.01 Вещественное

Parameters

Name Parameter Description Data type
Shock absorber deformation, m S Shock absorber deformation Вещественное
Speed differential, m/s V Relative speed Вещественное
Force, N F Total force Вещественное

Examples

Examples of block application: