![]() ![]() Moreover, ascent/descent tests on the stair confirmed the estimated vibration levels per our detailed FEM. Measurements indicated that the model’s frequency estimate was within 1% of the measured stair frequency. Just before the construction was complete, a quick vibration test opportunity was obtained. Optimum plate sizes were determined while keeping the vibration levels below acceptable levels. Solution StrategyĪ finite element model (FEM) of the stair was built and enhanced vibration analyses were conducted with consideration for people ascending/descending the stair. Maximum peak acceleration was selected as the monumental stair vibration criteria following the recommendations of the American Institute for Steel Construction, Design Guide – 11. The required plate sizes were designed per the vibration analysis. ![]() The vibration design task was to construct a 3-D finite element model of the stair, including the connections to the floors, and to perform footfall vibration analysis. Given the complex geometry of the stair, it was constructed from steel plates. However, if some data like eccentricity are not. ![]() e eccentricity (can be given or provided by vendor) wmachine frequency. mmass of rotating element of your machine (rotor), you can have this value from vendor data. The tenant desired to connect three floors through an elegant, spiral stair. Amplitude for machine vibration problem can be computed by: Fmew2.
0 Comments
Leave a Reply. |