Modal Testing
In the last decade, due to the development of computer technology, FFT analyzers, high-speed data acquisition systems, as well as vibration sensors and exciters, experimental modal analysis has developed rapidly and has received high attention from many industrial sectors such as machinery, electricity, construction, water conservancy, and aviation. Especially in the field of aircraft, with the development of economy and technology, the demand for aircraft at home and abroad is increasing. To meet this market demand, major domestic and foreign companies are accelerating the development of new aircraft, including general aviation aircraft, passenger aircraft, transport aircraft, and drones. These products have high safety requirements and a large demand for modal testing and analysis.
Shaker excitation modal test, impact hammer excitation modal test.
The laboratory has multiple sets of shakers from MB, Jiangsu Donghua, etc., and a dynamic high-speed data acquisition and analysis system with hundreds of channels. It has various testing and analysis capabilities such as shaker modal testing and impact hammer modal testing, and can accurately extract modal parameters such as frequency, mode shape, and damping.
1) Common Shaker Parameters
Rated force (peak): 50N, 100N, 200N, 300N
Working frequency range: 2Hz~2,000Hz
Max. rated stroke: 20mm
Max. peak current: 14A
Nonlinearity: ≤3% (of max. excitation force)
Input method: Four-pin socket
Output method: Push rod
Working temperature: -30°C~70°C
Humidity: ≤95% R.H
Dimensions: 180mm*145mm
Weight: 18KG
2) Common Impact Hammer Parameters
Includes 4 types of hammer tips (rubber, nylon, aluminum, steel)
Piezoelectric force sensor with a range of 500N
Resonant frequency: >22kHz
Supply voltage: 20~30Vdc
Supply current: 2~20mA
Sensing element: Quartz
Hammer weight: 200g
Hammer diameter: 20mm
Tip diameter: 6mm
