Moment of inertia calculation of structure
Challenge: Find inertia properties of a structure as accurate as possible
Motion analysis of a structure always requires inertia properties of the structure such as mass, center of gravity, principal axis of inertia and principal moment of inertia.
In reality, however, the following pains come up very often.
- No CAD data which require to measure the properties by test.
- Insufficient accuracy of measured inertia properties by two points lifting sling method.
- Principal moment of inertia (Product of inertia) is not able to be obtained by legacy method using the moment of inertia measuring platform.
How to resolve pains:
Apply ESTECH.[ I ]property to the problem and get highly accurate inertia properties.
- Excite a structure by impact hammer and identify the inertia properties from the mass line of the frequency response curve.
- It is applicable to both free-free and elastic support boundary conditions.
Application example of the software
- Standalone engine
- Powertrain on the completed vehicle
Strength of the Software
- Easy and quick to apply because inertia properties are identified by straight forward hammering excitation test.
- Principal moment of inertia is identified which is not able to get by the test with moment of inertia measuring platform
- Combining with ESTECH.Rmotion finds the inertia properties quite accurately even if the elastic resonant frequency is low.
