Classification and combination of basic loads of t

2022-10-15
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Classification and combination of basic loads of hoisting machinery

1. Basic load

basic load refers to the load that always or often acts on the crane structure, including self weight load, lifting load, inertia horizontal load, and considering the dynamic load effect of multiplying the dynamic load coefficient (,) and the corresponding static load. For some cranes operating with grab (bin) or electromagnetic disc, the dynamic load reduction effect caused by the lifting load due to sudden unloading should be considered

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additional load refers to the load that the structure of the crane is subjected to under normal working conditions. It includes the maximum wind load acting on the structure under the working state of the crane, and the reason why the crane is awarded laterally due to its manufacturing process force to a large extent, as well as the temperature that is considered according to the actual situation Degree load, ice and snow load and some process loads, etc. "Take the Industrial Park as an important carrier of industrial development

3. Special load

special load refers to the maximum load that the structure may be subjected to when the crane is in non working state or the accidental adverse load that the structure is subjected to in working state. The former includes the maximum wind load and test load that the structure is subjected to in non working state, as well as the installation load, seismic load and some process loads that are considered according to the actual situation ; The latter, such as the collision load received by the crane in working state, will be solved for you at the first time

combination I refers to those who only consider the combination of basic load, combination II refers to those who consider the combination of basic load and additional load, and combination III refers to those who consider the combination of basic load and special load or all three types of loads

various load combinations are the original basis for structural strength and stability calculation. The safety factors of strength and stability must meet the specified values under load combinations I, II and III at the same time. Fatigue strength is calculated only according to load combination I

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