Method of predicting fatigue life of power transmission tower in cold areas
A technology for fatigue life prediction and transmission towers, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems that the fatigue life prediction method of transmission towers has not been involved, and the research on fatigue life prediction of transmission towers is few. Achieve the effect of extensive promotion value, design rationality guarantee, and simple and easy method
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[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. This example is a 750kV line project in a certain area in Xinjiang, with a design wind speed of 31m / s (average maximum value of 10min once in 50 years at a height of 10m), icing of 5mm, and an extreme minimum temperature of -30.0°C.
[0047] Such as figure 1 As shown, the steps of the fatigue life prediction method for transmission towers in cold regions are: determination of random wind load spectrum → determination of fatigue risk parts of transmission towers → dynamic analysis of transmission towers under wind vibration → analysis of rainflow counting method → S-N curve at low temperature Determination → determination of low temperature fatigue life, the specific process is as follows:
[0048] 1) Determination of the random wind load spectrum: Statistically and simulated the average wind and fluctuating wind in the cold area respectively,...
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