Optimization And Study Of Blast Resistance Of Concrete Blast Walls Under Fixed Material Conditions

Explosion events primarily pose the threat of shockwaves,efficiently mitigated by the strategic deployment of blast walls.These walls harness their structural robustness to absorb and reflect shockwaves,thereby reacting to the imposed load.However,prevalent blast wall designs frequently encounter setbacks of resource-heavy requirements and high cost.In light of this,our study integrates traditional blast wall design approaches with the theoretical foundations of volumetrics.Through theoretical exploration and proposed designs,we employed CAE tools like Soildworks,hypermesh,and Ls-dyna for simulation-based feasibility assessment.Our research outputs are summarized as follows:(1)Basic theory research: We adopted mathematical apparatus to derive and validate shockwave dynamics,highlighting the relationship between shockwave overpressure decay and distance.Our study also elucidates the omnipresence of shockwave diffraction and deflection phenomena during blast wall load response.(2)Numerical simulation experiment: Utilizing finite element analysis,we screened wall configurations,identifying the wall’s blast surface shape as a crucial determinant of its blastresilient capability.Particularly in multi-layered structures,we investigated the influence of wall layer number,blast surface combinations,and wall length on blast resistance.Comparative strength analyses of the novel and traditional blast walls were conducted via finite element analysis,taking into account aspects such as wall cracking,vibration,and displacement.(3)Conclusion: Installation of cylindrical concrete walls,varied in cross-sectional shapes and layer numbers,within the protected zones can promote interplay between reflected waves and interference composite waves,enhancing wall capacity to absorb shockwave-borne mechanical energy.These meticulously designed walls offer comparable blast resistance to traditional counterparts,yet with significantly less material requirement.Adjusting the layer count of composite walls or extending wall length enables tailored shockwave protection solutions.Nevertheless,strength reduction from wall segmentation should be critically considered when opting for this new blast wall design.