(USING ANSYS, DESIGNSPACE, AND INVENTOR 3D CAD)
In addition to weight loading, a structure must be designed to withstand external loading from machinery live loads, and the environment. Cyclic loading can be more detrimental to a structure than a static or weight load. The dynamic characteristics of structures must be tailored to the equipment installed on them. A structure must not have natural frequencies or mode shapes which could be excited by the harmonic forces from operating equipment. A complete analysis of the structure and the supported equipment can be performed to “de-tune” the structure and avoid resonant conditions. EDI uses a variety of analytical methods to evaluate the dynamic characteristics of structures, including ANSYS, FEpipe, CAESAR, and other specially developed software.
For existing structures, dynamic properties can be defined by testing to identify natural frequencies and mode shapes which may be amplified and cause excessive vibration and/or failure. Impact methods, using instrumented hammers, are effective on machinery, piping and small structures. For larger or complex structures and foundations, shakers are used. EDI has a variety of shakers capable of producing cyclic force up to 10,000 lbs at low frequencies to simulate large, low speed machines. Smaller shakers produce a range of frequencies up to 10,000 Hz with lower force levels.
- Structural & Finite Element Modeling
- Engine, Compressor & Skid Vibration
- Gas & Liquid Piping Systems
- Flow-Induced Vibration
- Foundation & Soil Dynamics
- Thermal Flexibility & Stresses
