WS-Z30 Earthquake Shaking Table
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Introduction
There are three types of Earthquake Shaking Tables: hydraulic type, mechanical type, and electromagnetic type. An earthquake shaking table is an indispensable device in structural earthquake resistance, natural frequency measurement, vibration analysis. The cost of a shaking table depends on its size, performance, and the corresponding supporting equipments. Generally it costs several hundred thousand to over a million us dollars to build one shaking table and the maintenance costs are high. Therefore, it may be too costly for many institutions and new institutions of science and engineering to buy such equipment. Even they could afford and purchase such equipment, it would still be difficult and unsuitable for it to be used for general teaching purposes. The "WS-Z30 earthquake shaking table system" produced by our company is specially designed for teaching and training in institutions of science and engineering. It has nearly the same features and exactly the same content of experiment of a large vibration table but with much lower costs. It is very suitable for teaching and training. It enables students to study through experiments, to understand and master the methods needed in vibration experiments, thus laying the foundation of their future involvement for the construction of medium or large vibration tables.

In addition to teaching and training, this system can also be used for the vibration assessment test of small devices, such as, precision electronic equipments, handheld devices, computer hard drives, sensors, MEMS sensors and other equipments. Another usage of the system is the calibration of sensitivity and frequency response curves of other sensors as long as a standard accelerometer (such as B&K's accelerometer for calibration) is available. Sensor calibration is necessary for study of sensors, engineering test, field test, vibration monitoring, etc.
The Configuration of the System
  • Horizontal and Vertical table
• Exciter
• Power Amplifier
• Control Instrument
• Charge Amplifier with two channels
• ICP Acceleration Sensor Amplifier with eight channels
• 1 Piezoelectric Accelerometer
• 6 ICP Accelerometers
• Standard Industrial Cabinet
• 6 stories frame structure model
• Teaching Software with modal shapes animation
• Computer
Contents of Experiment  
  (1) Earthquake simulation; Generation and Application of an Artificial earthquake wave; Calculation of the accelerating response spectrum of earthquake time history
  (2) Test of structural modal shape by the excitation of white noise
  (3) Beat wave simulation  
  (4) Sine wave simulation  
  (5) Random waves simulation  
Basic Specification  
  Shaking Table, Exciter and Power Amplifer (3 Options)  
 
100N Shaking Table
( WS-Z30-10 )
300N Shaking Table
( WS-Z30-30 )
500N Shaking Table
( WS-Z30-50 )
Horizontal table Horizontal table Horizontal table
Maximum Load: 10,000g (22.06 lb)
Weight: 7,100g (15.66 lb)
Dimension: 400x300x22mm (15.76x11.81x0.866")
Maximum Load: 20,000g (44.12 lb)
Weight: 9,500g (20.96 lb)
Dimension: 460x346x22mm (18.11x13.62x0.866")
Maximum Load: 30,000g (66.18 lb)
Weight: 11,500g (25.37 lb)
Dimension: 506x380x22mm (19.92x14.96x0.866")
Vertical table Vertical table Vertical table
Maximum Load: 500g (1.103 lb)
Weight: 177 g (0.391 lb)
Dimension: 66x10mm ( 2.6x0.39")
Material: Aluminum
Maximum Load: 1,000g (2.206 lb)
Weight: 177g (0.39 lb)
Dimension: 66x10mm ( 2.6x0.39")
Material: Aluminum
Maximum Load: 2,000g (4.41 lb)
Weight: 450g (0.99 lb)
Dimension: 100x10mm ( 3.94x0.39")
Material: Aluminum
Exciter Exciter Exciter
Model: JZ-10
Frequency range: 5 to 4000Hz
Maximum displacement: ±3mm
Exciting force: 100N
Model: JZ-30
Frequency range: 3 to 3500Hz
Maximum displacement: ±3mm
Exciting force: 300N
Model: JZ-50
Frequency range:1 to 3000Hz
Maximum displacement: ±6mm
Exciting force: 500N
Power Amplifier Power Amplifier Power Amplifier
Model: GF-100
Distortion: <0.5%
Noise: < 3mV
Output resister: 1 Ohm
Frequency range: 1 to 10000Hz
Output current: 10A
Output voltage: 15V
Power: 100VA
Power supply: AC110V to AC220V
Dimension: 440x480x160mm (17.34x18.92x6.30")
Model: GF-300
Distortion: <1%
Noise: < 5mV
Output resister: 0.6 Ohm
Frequency range: 1 to 10000Hz
Output current: 15A
Output voltage: 25V
Power: 300VA
Power supply: AC110V to AC220V
Dimension: 440x480x180mm (17.35x18.91x7.09")
Model: GF-500
Distortion: <1%
Noise: < 10 mV
Output resister: 0.5 Ohm
Frequency range: 1 to 10000Hz
Output current: 25A
Output voltage: 25V
Power: 500VA
Power supply: AC110V to AC220V
Dimension: 440x480x180mm (17.35x18.91x7.09")
  Control Instrument and Front Panel
 

Model: WS-5932Z/U160216-DA2
A/D Parameters:
  Channels: 16
  Resolution: 16Bits
  Input range: ±10VDC
  Total sample frequency: 200kS/s
D/A parameters:
  Channel: 1
  Output range: ±10VDC
  Output mode: sine wave, random wave

Power supply: Single-phase AC110V or AC220V
Relative Humidity: <85%RH

  Charge Amplifier and Front Panel
  Model: WS-2411Z
Channels: 2
Charge input range: 0.1pC to 50000pC
Voltage input range: 0.1V to 5V
Frequency range: 0.16Hz to 20kS/s
Integral highpass filter (Hz): 0.1 to 100,1.0 to 1k,10.0 to 10k
Lowpass filter (Hz): 10,20,50,100,200,500,1k,2k,5k,10k,20k, Decay rate is 140dB/Oct.
  ICP Acceleration Sensor Amplifier and Front Panel
    Model: WS-4601Z
Channels: 8 ICP input and 8 voltage output
Analogue output voltage: ±10V
Gain: 1 or 10
  Piezoelectric Accelerometer


Z30 shaking table with 6 stories frame structure and intalled accelerometers
  Model: BZ1107
Quantity: 1
Sensitivity: 20pC/m/s2
Frequency range: 0.2Hz to 6kHz
Weight: 38g
  ICP Accelerometer
 

Model: YD81D-V
Quantity: 6

Sensitivity: 10mV/m/s2
Frequency range: 0.5Hz to 10kHz
Weight: 25g

  Sample Model
 

6 stories frame structure model

  Teaching Software
  Software's name is Vib'SQK. The software may control the teaching instrument. It performs all experiments in the list. It also has a function to show the model's modal shape's animation.

General Wiring Diagram of the Control system

Example Figures of Experiments  
  6 Stories Frame Structure Model's Modal Shapes:  
 
1st Level Modal Shape
2nd Level Modal Shape
3rd Level Modal Shape
 
Transfer Function of Structure Model
   
 
The shaking table works at horizontal direction The shaking table works at vertical direction
Earthquake Time History Response Spectrum of Earthquake (Calculated)
   
Beat Wave Drive Signal White Noise Drive Signal
Control Software Panel
    
   
Application (Videos)

Show this videoThe 15th structural design competition was held at Tsinghua University in P.R. of China on December 18, 2009. Participating students were from the Department of Civil Engineering, Hydraulic Engineering and Mechanics. Competition model material is wood. Competition structure is designed as a two-layer structure. The size of the designed structure was the same for all participants. Four lead weights, each weighs 4kg, are loads. The total weight of the load is thus 16kg. Chinese Sichuan Wenchuan NS seismic wave was used for the exciting of the earthquake shaking table. The seismic excitation duration is 30 seconds. The criterion of winning the competition is that model which is the lightest and which is the most earthquake-resistant.
 
Show this videoThe Fifth National Structure Design Contest for College Students was held in the Southeast University in Nanjing in P.R. of China on October 20, 2011. There are more than 73 participating universities. the University of Macau, Taiwan, Japan, the University of Tennessee from US attended the contest. Each team consists of three college students. Of the 73 participating universities, 34 of them have bought this model of shaking table. The model was produced under the rules of contest for two days at the contest site. The model-making material is of bamboo skin. Bamboo skin is tough and flexible. The total height of model is 100cm with four floors. The net height of each floor is less than 22cm. The maximum load - total weight of iron pieces - is not more than 30kg. A water tank was placed on the top of the model.

For more information about the system, please contact sales@sensor.in