Wu, Z.; Zhang, Y.; Sun, C.; Feng, L.; Liu, S.; Jiao, B. Simulation Methods for MEMS S&A Devices for 2D Fuze Overload Loading. Micromachines2023, 14, 1566.
Wu, Z.; Zhang, Y.; Sun, C.; Feng, L.; Liu, S.; Jiao, B. Simulation Methods for MEMS S&A Devices for 2D Fuze Overload Loading. Micromachines 2023, 14, 1566.
Wu, Z.; Zhang, Y.; Sun, C.; Feng, L.; Liu, S.; Jiao, B. Simulation Methods for MEMS S&A Devices for 2D Fuze Overload Loading. Micromachines2023, 14, 1566.
Wu, Z.; Zhang, Y.; Sun, C.; Feng, L.; Liu, S.; Jiao, B. Simulation Methods for MEMS S&A Devices for 2D Fuze Overload Loading. Micromachines 2023, 14, 1566.
Abstract
A simulation test system for the two-dimensional (2D) fuze overload loading process was designed to address the loading issues of recoil overload and centrifugal overload in fuze safety and arming (S&A) devices. By incorporating centrifuge rotation energy storage, impact acceleration simulation, and equivalent centrifugal rotation simulation, a block equipped with a fuze S&A device was accelerated instantly upon being impacted by a centrifuge-driven impact hammer, simulating recoil overload loading. The impact hammer was retracted instantaneously by adopting an electromagnetic brake, which resulted in the centrifugal rotation of the block around its track, to simulate the centrifugal overload loading. The dynamic equations of the simulation test system and the equations of impact hammer motions were established, whereby the rotation speed of the centrifuge and the braking force of the electromagnetic brake were calculated and selected. A dynamic model of the collision between the impact hammer and block was established using ANSYS/LS-DYNA software for simulation analysis. The acceleration curves of the recoil overload and centrifugal overload with variations in the centrifuge speed, cushion material, and buffer thickness were obtained, which verified the feasibility of the proposed loading simulation method. 2D overload loading simulation tests were performed using the developed simulation system, and the acceleration curves of the recoil overload and centrifugal overload were measured. The test results indicated that the proposed system can accomplish 2D overload loading simulations for a recoil overload of several 10000 g and centrifugal overload of several 1000 g.
Keywords
fuze MEMS S&A device; recoil overload; centrifugal overload; simulation test
Subject
Engineering, Safety, Risk, Reliability and Quality
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
