Power Machinery and Design in Steel Structure Building

       Power machinery in steel structure buildings

Power machinery can be divided into machines according to the power characteristics of operation. For example, the output of mechanical power such as metal cutting is not large, so it does not need to be considered. For equipment with particularly large operating power, the characteristics of power need to be considered. If the dynamic characteristics of mechanical operation are ignored, the use of power machinery will adversely affect the construction of steel structures. Power machinery and equipment will vibrate during use, which will have a serious impact on steel structure buildings, land and surrounding buildings, thereby affecting people's production and life. In addition, the scope of vibration is relatively wide, which may cause damage to some precision instruments and meters in the construction, affecting the measurement accuracy of the instruments and meters. Power mechanical equipment can be divided into impact-action equipment and periodic-action equipment according to the different vibration frequencies. Power machinery can be divided into frame type, block type and wall type according to different structures. The most widely used steel structure building is the block structure, which has the advantages of simple installation, simple planning and maintenance of equipment-related piping, and the supplier of the equipment can provide dimensions. The elastic deformation of this foundation causes vibrations. Wall foundations are similar to transverse frames in frame structures and have good rigidity, which are often used in crushers. For wall structures that require precise calculations, calculations can also be performed on block foundations. The frame-type foundation is usually composed of a floor, a column and a top plate. For the installation of high-speed equipment, there is no need to consider the elasticity problem. The calculation basis of the frame foundation is the system of degrees of freedom, and the principle is the structural dynamics.

 

Design of Power Machinery Equipment in Steel Structure Building

The design of power machinery is more complicated than that of non-power machinery. The unreasonable installation of some equipment and the failure of seismic isolation will cause vibration, which will adversely affect the steel structure building. Therefore, it is necessary to reasonably design the power machinery and equipment, and it is necessary to analyze the vibration of the equipment according to the design drawings. The steps of power machinery foundation design are: determine the size of the foundation structure according to the design samples and specifications; it is necessary to determine the distribution of the equipment load, the size of the disturbance force and the frequency of the disturbance force according to the equipment sample. Calculate the natural frequency of the basis set, avoid working in the resonance region, but can work in the resonance region when the disturbance force and amplitude are small. Calculate the base amplitude to make sure it works within a reasonable range. When the frequency of the disturbance force is higher than the base set frequency, it is necessary to check whether the amplitude of the resonance region meets the requirements of the sample device. For frame type and wall type foundations, it is necessary to calculate the bearing capacity of the foundation under dynamic action. In addition, it should be noted that if the power machinery does not meet the requirements of the equipment, the design needs to be revised and recalculated in time.