Design and Optimization of Combined Constant Resistance Energy Absorption Device
To improve the constant resistance effect of existing energy-absorbing devices,introduces square tubes and partitions inside pre-folded energy-absorbing devices and employs different assembly methods.Through mechanical performance analysis,the impact of various combinations on device performance is explored.The results show that:(1)The addition of partitions enhances the orderly deformation of the energy-absorbing device,reduces the fluctuation range of the bearing force,and improves the stability of the device in the compression stage.(2)The combination of square tubes and energy-absorbing devices changes the deformation mode of the energy-absorbing process,causing the upper and lower parts of the device to deform sequentially and bear pressure cooperatively,thereby significantly increasing the peak crushing force Fmax(49%),average crushing force Fmean(64%),and total energy absorption E(48.8%).(3)Setting an induction groove at the upper end of the energy-absorbing box can optimize the force-displacement curve,increasing the peak crushing force Fmax(30%),average crushing force Fmean(28%),and total energy absorption E(28%),while also improving the specific energy absorption ASE by 5.9%.Provides an effective structural design scheme for enhancing the performance of energy-absorbing devices,which is of great significance for safety protection in engineering applications.
rock burstprefolded energy absorption devicecombined energy absorption devicenumerical simulation
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