Aiming at the life index requirements of aerospace waveguide switches under repeated switching and impact conditions,the fatigue life design and verification are carried out.In the case that the stress spectrum of ac-tual working conditions is difficult to obtain,the fatigue life analysis is carried out and the experimental verification is carried out by using two different methods to obtain the stress spectrum based on the numerical calculation meth-od.The physical verification results show that the fatigue life analysis results based on the transient dynamics have a high accuracy.On this basis,the product structure is optimized and improved to make the product switching life meet the index requirements.
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