Ocean model electromagnetic high-frequency vibration table

The ocean model specific electromagnetic high-frequency vibration table is a professional mechanical environment equipment designed for scaled models of ships, ocean platforms, underwater equipment, etc. It simulates high-frequency vibration and impact conditions during ocean waves, currents, and ship navigation/operations, and conducts structural strength, fatigue life, and equipment reliability testing.Ocean model electromagnetic high-frequency vibration table

working principle

The core is based on Lorentz force drive+closed-loop feedback control: alternating current is passed through the moving coil in a constant magnetic field (permanent magnet/excitation coil) to generate reciprocating electromagnetic force at the same frequency as the current; The dynamic coil is rigidly connected to the tabletop, driving the ocean model to perform precise vibration; The table top acceleration sensor collects signals in real-time, compares and corrects them with the set values of the controller, ensuring high-precision output of frequency, amplitude, and waveform. It can reproduce various modes such as sine, random, shock, and measured vibration spectra of ships/ocean platforms.

System Composition

Platform body: including magnetic circuit (yoke, permanent magnet/excitation coil), lightweight high rigidity dynamic coil, aluminum alloy test platform (with standard fixture interface), linear bearing+air spring guiding support system; High power models are often equipped with air-cooled/water-cooled cooling to prevent overheating of the moving coil.

Power amplifier: amplifies the control signal into a large current, driving the dynamic coil to output sufficient amplitude and thrust.

Digital control system: capable of setting frequency, acceleration, waveform, achieving sweep frequency, resonance dwell, shock response spectrum, etc., supporting multi axis (single axis/dual axis/three-axis) composite vibration; Partial linkage environmental chambers (temperature and humidity/salt spray) can be used for comprehensive environmental testing.

Auxiliary system: Vibration isolation foundation/airbag isolation device, to avoid the influence of vibration transmission to the laboratory; Safety interlock protection (overcurrent, overtemperature, table overtravel).

Core technical parameters (commonly used configurations for ocean models)

Frequency range: Conventional 5Hz~3000Hz, high-frequency models can reach 5000Hz;

Acceleration: 20g~100g (some impact modes can reach 200g+);

Load capacity: ranging from tens of kilograms (small scaled models) to hundreds of kilograms (segmented models of large offshore platforms);

Vibration direction: vertical+horizontal (X/Y/Z three-axis), can operate separately or in combination;

Waveform distortion: generally<5%, meeting the high-precision requirements of ocean engineering testing.

Typical applications of ocean models

Ship and ocean platform models: simulate propeller excitation, wave impact, deck mechanical vibration during navigation, test structural resonance, weld fatigue, and pipeline looseness;

Underwater robots (ROV/AUV): simulate deep-sea flow field vibrations, deployment and recovery impacts, assess electronic cabin sealing and sensor stability;

Offshore wind/oil and gas equipment model: Simulate the vibration and impact caused by typhoons, ocean currents, and ship collisions, and verify the structural strength of tower frames and pipe racks;

Marine instruments: testing the anti vibration performance and data acquisition reliability of buoys and acoustic equipment in wind and waves.

Advantages and Selection Points

Advantages: Good high-frequency response, precise waveform, flexible control, low noise; Reproduce the real ocean vibration environment, expose structural and equipment defects in advance, and shorten the research and development cycle;

Selection suggestion: Determine the platform load, power, frequency range, and expansion configuration based on the weight, size, target vibration spectrum (frequency range, maximum acceleration) of the ocean model, and whether multi axis/salt spray/temperature humidity coupling tests are required.

Ocean model electromagnetic high-frequency vibration table