Test Modal Analysis

There are a variety of analysis methods in the Test Modal Analysis depending on required accuracy and analysis agenda, however, it is the most important to measure proper frequency response functions.

To measure the proper frequency response functions, the following conditions are needed to be set based on the experience and know-how of test engineers in the company.

　
• The support structure and support method of the test specimen are suitable for the purpose of the test
• choose proper excitation and measuring points
• select proper excitation method, measuring condition and instruments
• minimize the adverse effect of test instruments to vibration characteristics of test specimen
• achieve high coherence between excitation input and response as well as reciprocity and repeatability

　　

In the case of modal analysis, it is necessary to select the optimum method according to the phenomenon and verify the accuracy of modal parameters to acquire the target dynamic characteristics.
In this case, the accuracy of the above modal parameters is verified with the synthesis result of the frequency response function using the extracted modal parameters, the orthogonality of each natural vibration mode shape (MAC), and the validity of the natural vibration mode shape (deformed shape).

Taking advantage of abundant experience and accumulated engineering know-how, the company has a confidence to deliver high quality output such as measurement data of frequency response functions.

　　

Application Examples

• Vehicle Body
• Vehicle Components and Parts
• Truck Cabin and Frame
• Office Automation Apparatus
• Artificial Satellite
• Rolling Stock

Please feel free to contact for cases other than the above.

Example of measurement and analysis system configuration

Software

• PULSE Labshop (Online Real-time Analysis Software)
• PULSE Reflex (Offline Signal Processing Software)

Hardware

• LAN-XI (Measuring Front-End)
• Electromagnetic Exciter
• Impact Hammer
• Tri-axial accelerometer

Hardware & Software

In addition to conducting test projects, the company proposes and delivers the best fit test hardware and software configuration to satisfy clients demand and requirement.