APS DYNAMICS 113 long stroke shakers
Portable 35kg vibration shaker with additional reaction masses driven by APS 114 EP extended power amplifier. Suitable for testing medium size full-scale civil engineering structures to which the shaker is attached. The shaker has been successfully used in testing of long-span concrete floors and footbridges in open space conditions weighing up to 1,500 tonnes. The test structures may be empty or occupied by stationary or moving people, giving an opportunity to assess the effects of human-structure dynamic interaction. The shaker can also be used for direct drive with a stinger. The moving mass is 17.6 kg and the shaker can generate up to 100 N harmonic force amplitude.

APS DYNAMICS 400 long stroke shakers: vertical mode
All new shakers have reaction mass assemblies suitable for reaction mode excitation of large civil engineering structures. Also, custom-built horizontal reaction mass assemblies have been acquired so that the rated harmonic force can be applied horizontal to frequencies as low as 0.5 Hz, which is particularly important for structures with low horizontal natural frequencies, such as long-span bridges and sports stadia. All four available shakers can be controlled using the newly-acquired Mobilizer II spectrum analyser suitable for advanced multi-input and multi-output (MIMO) testing of structures. The shaker can also be used for direct drive with a stinger. The moving mass is 30.1 kg and the shaker can generate up to 450 N harmonic force amplitude.

APS DYNAMICS400 long stroke shakers: horizontal mode
With slightly reduced moving mass and friction connection with the structure, the shakers can be used to shake with full 450N force characteristic down to 2Hz.

APS DYNAMICS 400 long stroke shakers: shaking table
Horizontal rig with linear bearings, the shaker operates as a uni-axial shaking table. The same platform can be used to mount up 500kg of masses to allow the shakers to generate full 450N force characteristic down to 0.5Hz.

Power amplifiers for long stroke shakers
Able to run in Voltage or current mode to drive APS113 and APS400 long stroke shakers.

DYTRAN MODEL 5803A Instrumented impulse hammer
Portable and manually operated instrumented impact hammer for the application of transient loading on full-scale structures in the low frequency range; weight 5.4kg; max. peak force 22kN, used in conjunction with the Diagnostic Instruments DI2200 portable spectrum analyser for quick and cheap modal testing of small and medium size Civil Engineering structures; battery-powered signal conditioner.

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