Instructions

This package allows you to investigate the forced vibration response of an axial five degree-of-freedom system with damping.

| This indicates a rigid abutment. These are fixed to earth and may be at either end of the system.
| This indicates a rigid mass and you will be able to change the size of the mass in kg.
| This indicates a massless spring and you will be able to change its stiffness in N/m.
| This indicates a viscous damper and you will be able to change its coefficient in Ns/m.
| This indicates the excitation force position and you will be able to change its position by clicking above the desired mass.
| This indicates the measured displacement position and you will be able to change its position by clicking below the desired mass.

When the applet is loaded the system that is shown looks like,

| The response curve for this system is shown as a graph. As a first experiment use the mouse to move the X and F positions to see how the response changes. The animation shown under the response is for the frequency shown by the blue line. This frequency can be changed by dragging the line.

Changing a a spring/mass/damper

| Use the mouse to select a spring/mass/damper.

Changing parameter values.

| When a spring/mass/damper is selected the edit button will allow parameter values to be changed using a dialogue box.

NOTE: Even though the excitation frequency is changed on the graph the frequency of the animation is constant for ease of viewing.