An experimental device for outdoor wind-induced snow drift

Abstract

The present invention provides an outdoor wind-induced snow drift testing device which comprises a fan device for providing wind power, a flow stabilizing device for stabilizing a wind speed, a flow guiding device which is a connection pipe between the fan device and the flow stabilizing device, a vibration device which is arranged at the wind direction part of the flow stabilizing device and is used for simulating a snow environment, and a model device which is arranged I the drift range of snow and is used for simulating a house structure. The outdoor wind-induced snow drift testing device has the advantages that an air refrigeration link is avoided, the operation cost of a test is low, multiple repeated tests can be carried out and a fan matrix group is open, and since the limitation of blocking probability in a wind tunnel is reduced, the scale ratio upper limit of a model component becomes larger.

Description

technical field [0001] The invention relates to wind tunnel test equipment, in particular to a test device for outdoor wind-induced snow drift. Background technique [0002] With the progress of society, the span of large-scale building roof structure is getting larger and larger, the roof form is becoming more and more complex, and the effect of snow load is becoming more and more sensitive. Engineering accidents caused by ignoring the uneven distribution of snow load Therefore, the prediction of snow load has gradually become a problem that cannot be ignored in the design of long-span roofs. Most of the regulations on uneven distribution of snow load in domestic codes refer to European and American codes, lacking the support of actual measurement and experimental data, which also affects architectural design. There are some safety hazards. [0003] At present, there are three methods for snow load research, namely snow load measurement, wind tunnel test and numerical simu...

AI Technical Summary

Problems solved by technology

Due to the limitation of climate and measurement conditions, the actual snow load measurement progresses slowly and the basic data is very scarce; although the numerical simulation costs less and the design cycle is short, it lacks the support of actual measurement and experimental data, and lacks a unified standard

[0004] The wind tunnel test is the main method for Chinese and foreign scholars to study snow loads. However, there are some significant shortcomings in the application of traditional wind tunnel test techniques to study snow loads: First, wind-induced snow drift experiments in ordinary normal temperature wind tunnels can only be done with snow ( Fine silica sand, baking soda, etc.) to replace snow particles, and the physical properties of snow and real snow particles are very different; second, the climate environment wind tunnel is expensive, and a large amount of power support is required to create a low temperature environment, and the operating cost The third is that the size of the experimental model will be greatly limited by the blocking rate whether the test is carried out in a normal temperature or climate wind tunnel; fourth, the experimental measurement basically uses steel ruler measuring point drawing at this stage, and the accuracy and technicality are poor

These problems will have a great impact on the results of wind-induced snow drift experiments

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