For the layout of vibration isolation systems and test rig components, CFM Engineers apply modern FEM calculations. Parts and assemblies are iteratively designed based on static and dynamic analyses. Additionally, CFM Schiller offers the service of finite element calculations to enhance your own products.
Planning and layout of seismic masses is based on calculations with a rigid body model. In the subsequent steps, both the concrete foundation and the clamping plate are analyzed and optimized with different FEM calculations. This procedure guarantees a functioning design, particularly in applications with high frequencies and large forces. Depending on the requirements, one or multiple of the following 3 analysis procedures are applied by CFM Schiller.
The linear static analysis computes resulting stresses and deformations from given forces and moments. Computers apply principles of classic elastostatics to complex geometries while our experienced engineers evaluate these results. This analysis provides quantitative information about stiffness and strength of parts and assemblies.
A modal analysis calculates the natural frequencies and mode shapes of complex structures. If the natural frequencies of a component are too close to the frequency band, in which the test rig will operate, the part’s natural frequencies must be increased through design changes. The mode shapes are also critically analyzed by our engineers concerning the expected loads. The results are qualitatively taken into consideration for the layout.
A so called frequency response analysis examines the component’s dynamic reaction to excitations in the natural frequency band. It is based on the results from the modal analysis. With this method, oscillation displacement, velocity, and acceleration are computed quantitatively. These values can be displayed as vectors for specified nodes of the FEM model. The calculation procedure is mainly offered as a service for customers, the analysis of the results is at customer’s discretion.