Study on Denoising Method of Vibration Signal Induced by Tunnel Portal Blasting Based on WOA-VMD Algorithm

Because of the impact complex environment tunnel portals, measured blasting vibration signals in a portal contains lot high-frequency noise. To achieve effective noise reduction, novel method reduction for based on whale optimization algorithm (WOA) optimized with variational mode decomposition (VMD) was proposed. The WOA is used to optimize globally number K and penalty factor α VMD determine optimal parameters [K, α], obtain intrinsic function (IMF). Multi-scale permutation entropy (MPE) identify remove components IMF, then reserved IMF reconstructed denoised signal. applied analysis Xiali Jixin expressway Henan Province. Results indicate that can acquire high frequency Its denoising effect better than conventional complete ensemble empirical adaptive ability (CEEMDAN), which verifies self-adaptivity effectiveness WOA-VMD method.