In this paper, the blast-loading experiment and numerical simulation are carried out for RC slabs with two typical reinforcement ratios. The time history of reflected shockwave pressures displacement responses at different positions on impact surface specimens obtained, influence ratio dynamic failure modes is analyzed. Based experimental data, model slab verified, results indicate good agreement between methods. On basis, residual load-bearing capacity damaged show that load distribution...

The research on the structural response of explosive vessel is an important basis for design vessels. Double-layer cylinder structures are widely used in various This paper studied deformation a steel cylindrical shell under internal explosion and proposes new method measuring by PDV (photonic Doppler velocimetry). We carried out many spherical experiments obtained useful results that show displacement double-layer cylinders time. above process simulated LS-DYNA with finite element numerical...

The strong shock and vibration effect caused by explosion may pose a serious threat to the surrounding environment safety of personnel equipment. This also makes problem isolation absorption structures subjected blast loading increasingly prominent. In this paper, three kinds new combined devices with high resistance are designed manufactured, characteristic parameters such as natural period, frequency, damping ratio obtained through drop hammer impact test. Based on Duhamel integral...

To improve the firing stability of Galtling gun by installing an arc-shaped support plate on a light tripod,a dynamic model Gatling shooting tripod which has fixed different positions established based rigid-flexible multi-body theory. The muzzles vibration and tripods deformation obtained through simulation. results show that while close to bracket, supporting effect Galting decreased, increased. On contrary, it reduced enhanced stability. analytic provide reference in tripod.

To study the mechanical deformation characteristics and anti-explosion mechanisms of steel-structure protective doors under chemical explosion shock wave loads, numerical simulations loads door damage were carried out using AUTODYN LS-DYNA software based on model tuning with actual field test results. The finite element simulation results compared to verify accuracy material parameters. A parametric analysis was influencing factors performance beam–plate steel structure typical loads. impact...

High-strength steel has increasingly become widely used among various engineering practices, but the relevant provisions of codes lag behind its development. Six sets experiments on simple supported beams reinforced with HTB600 and HTB700 rebars subject to bending loading were conducted in this study 1) investigate conditions crack development, 2) contrast calculating modes short-term width between Chinese European concrete codes, 3) analyze applicability precision pertaining high-strength...

Multilayered combination of protective structures is an important means effectively weakening the explosive shockwave. On this basis, a “rigid‐flexible‐rigid” three‐layer sealed structure was proposed in paper and two models for were designed. Meanwhile, internal explosion tests conducted. One model used foam concrete as energy absorbing material other dense sand. The comparisons between test results computed obtained from formulae made, agreed well with results. Test showed that both had...

The rupture and its several influence factors on the short crossbeam of sieve case during square plansifter running are investigated. Aimed at system consisting a some suspenders, FEM is employed to establish structure dynamic model for obtaining response. According contrast vibration data body in experiment displacement response from FEA, finite element modified. Results show that position where maximum stress happens FEA actual same. Furthermore, various three dangerous positions computed...

In order to study the flexural performance of high strength reinforced concrete beam, through loading test six groups specimens, investigate its force deformation characteristic.Test shows that high-strength steel has very notable significance improve bearing capacity beam.The yield deflection and breakage load beam are also gradually increased with continuous enhancement strength.Calculate periodical value beams according code simplified M N   calculation method.After comparative analysis...

In order to reduce the recoil of High Initial Velocity Grenade Launcher (HIVGL) and obtain better firing precision, two reduction structures - short barrel structure laval nozzle were used for HIVGL. Virtual prototype simulation model HIVGL established, dynamics curves automatic mechanism human shoulder force obtained when was launched by dynamic software ADAMS. The motion characteristics variation regulation maximum analyzed with different combinations chamber charge amount. floating spring...

Abstract The dynamic response and failure characteristics of reinforced concrete beams under explosion loads are affected by various factors. To study the effect reinforcement strength on deformation properties RC to analyze differences high-strength different loads, comparative tests two kinds simply supported with longitudinal yield 400 MPa 700 were carried out respectively in this paper. test results show that mid-span section beam is basically same as ordinary when peak overpressure...