Defence Technology(防务技术)最新文献_第7页

LPI radar sequence design against cyclostationary analysis 基于周期平稳分析的LPI雷达序列设计

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2024.08.020

Qiang Liu, Fucheng Guo, Kunlai Xiong, Xi Li, Guizhou Wu, Weidong Hu

{"title":"LPI radar sequence design against cyclostationary analysis","authors":"Qiang Liu, Fucheng Guo, Kunlai Xiong, Xi Li, Guizhou Wu, Weidong Hu","doi":"10.1016/j.dt.2024.08.020","DOIUrl":"10.1016/j.dt.2024.08.020","url":null,"abstract":"<div><div>In this paper, we present a novel unimodular sequence design algorithm based on the coordinate descent (CD) algorithm, aimed at countering electronic surveillance (ES) systems based on cyclostationary analysis. Our algorithm not only provides resistance against cyclostationary analysis (CSA) but also maintains low integrated sidelobe (ISL) characteristics. Initially, we derive the expression of the cyclostationary feature (CSF) detector and simplify it into an iterative quadratic form. Additionally, we derive a quadratic form to ensure the similarity of the autocorrelation sidelobes. To balance the minimization of the detection probability and the ISL values, we introduce a Pareto scalar that transforms the multi-objective optimization problem into a convex combination of objective functions. This approach allows us to find an optimal trade-off between the two objectives. Finally, we propose a monotonic algorithm based on the CD algorithm to counter CSA analysis. This algorithm efficiently solves the optimization problem mentioned earlier. Numerical experiments are conducted to validate the correctness and effectiveness of our proposed algorithm.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"45 ","pages":"Pages 227-237"},"PeriodicalIF":5.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anti-migration of NG by using EPDM insulation materials coated with reduced graphene oxide 用还原氧化石墨烯包覆三元乙丙橡胶绝缘材料的抗NG迁移性能

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2024.10.004

Liyun Lin , Lipeng Sang , Yiheng Li , Jiawei Yan , Panpan Peng , Qilong Yan , Bowen Tao , Xiang Guo

{"title":"Anti-migration of NG by using EPDM insulation materials coated with reduced graphene oxide","authors":"Liyun Lin , Lipeng Sang , Yiheng Li , Jiawei Yan , Panpan Peng , Qilong Yan , Bowen Tao , Xiang Guo","doi":"10.1016/j.dt.2024.10.004","DOIUrl":"10.1016/j.dt.2024.10.004","url":null,"abstract":"<div><div>The migration of nitroglycerin (NG) has always been the critical issue that harmfully impacts the structural integrity and operational reliability of the solid rocket motor, which is mainly composed by Nitrate Ester Plasticized Polyether (NEPE) propellant/Hydroxyl-terminated Polybutadiene (HTPB) liner/Ethylene Propylene Diene Monomer (EPDM) insulation bonding system. This paper proposes an innovative surface modification method attempting to modify the EPDM insulation layer coated with reduced graphene oxide (RGO), which exhibits ability to weaken the NG absorption by EPDM insulation layer, blocking the pathway of NG migration into EPDM insulation materials. The microstructure of RGO-coated layer was analyzed and the formation mechanism was investigated. The RGO-coated layer is well bonded to the HTPB liner, and its anti-migration performance to NG at different temperatures has been evaluated. Comparing with blank samples under the same storage conditions, the RGO-coated layers can reduce the diffusion coefficient of NG by up to 87.3% and increase the diffusion activation energy of NG by 14.8 kJ⋅mol<sup>−1</sup>. This research provides a new strategy to effectively inhibit NG migration in NEPE propellant/HTPB liner/EPDM insulation bonding system.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"45 ","pages":"Pages 109-118"},"PeriodicalIF":5.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Resilient multi-objective mission planning for UAV formation: A unified framework integrating task pre- and re-assignment 无人机编队的弹性多目标任务规划：整合任务预分配和重新分配的统一框架

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2024.08.002

Xinwei Wang , Xiaohua Gao , Lei Wang , Xichao Su , Junhong Jin , Xuanbo Liu , Zhilong Deng

{"title":"Resilient multi-objective mission planning for UAV formation: A unified framework integrating task pre- and re-assignment","authors":"Xinwei Wang , Xiaohua Gao , Lei Wang , Xichao Su , Junhong Jin , Xuanbo Liu , Zhilong Deng","doi":"10.1016/j.dt.2024.08.002","DOIUrl":"10.1016/j.dt.2024.08.002","url":null,"abstract":"<div><div>Combat effectiveness of unmanned aerial vehicle (UAV) formations can be severely affected by the mission execution reliability. During the practical execution phase, there are inevitable risks where UAVs being destroyed or targets failed to be executed. To improve the mission reliability, a resilient mission planning framework integrates task pre- and re-assignment modules is developed in this paper. In the task pre-assignment phase, to guarantee the mission reliability, probability constraints regarding the minimum mission success rate are imposed to establish a multi-objective optimization model. And an improved genetic algorithm with the multi-population mechanism and specifically designed evolutionary operators is used for efficient solution. As in the task-reassignment phase, possible trigger events are first analyzed. A real-time contract net protocol-based algorithm is then proposed to address the corresponding emergency scenario. And the dual objective used in the former phase is adapted into a single objective to keep a consistent combat intention. Three cases of different scales demonstrate that the two modules cooperate well with each other. On the one hand, the pre-assignment module can generate high-reliability mission schedules as an elaborate mathematical model is introduced. On the other hand, the re-assignment module can efficiently respond to various emergencies and adjust the original schedule within a millisecond. The corresponding animation is accessible at bilibili.com/video/BV12t421w7EE for better illustration.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"45 ","pages":"Pages 203-226"},"PeriodicalIF":5.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oscillation mechanism and predictive model of explosion load for natural gas in confined tube 密闭管道中天然气爆炸负荷的振荡机理和预测模型

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2024.09.003

Chengjun Yue, Li Chen, Linfeng Xu

{"title":"Oscillation mechanism and predictive model of explosion load for natural gas in confined tube","authors":"Chengjun Yue, Li Chen, Linfeng Xu","doi":"10.1016/j.dt.2024.09.003","DOIUrl":"10.1016/j.dt.2024.09.003","url":null,"abstract":"<div><div>Gas explosion in confined space often leads to significant pressure oscillation. It is widely recognized that structural damage can be severe when the oscillation frequency of the load resonates with the natural vibration frequency of the structure. To reveal the oscillation mechanism of gas explosion load, the experiment of gas explosion was conducted in a large-scale confined tube with the length of 30 m, and the explosion process was numerically analyzed using FLACS. The results show that the essential cause of oscillation effect is the reflection of the pressure wave. In addition, due to the difference in the propagation path of the pressure wave, the load oscillation frequency at the middle position of the tunnel is twice that at the end position. The average sound velocity can be used to calculate the oscillation frequency of overpressure accurately, and the error is less than 15%. The instability of the flame surface and the increase of flame turbulence caused by the interaction between the pressure wave and the flame surface are the main contributors to the increase in overpressure and amplitude. The overpressure peaks calculated by the existing flame instability model and turbulence disturbance model are 31.7% and 34.7% lower than the numerical results, respectively. The turbulence factor model established in this work can describe the turbulence enhancement effect caused by flame instability and oscillatory load, and the difference between the theoretical and numerical results is only 4.6%. In the theoretical derivation of the overpressure model, an improved model of dynamic turbulence factor is established, which can describe the enhancement effect of turbulence factor caused by flame instability and self-turbulence. Based on the one-dimensional propagation theory of pressure wave, the oscillatory effect of the load is derived to calculate the frequency and amplitude of pressure oscillation. The average error of amplitude and frequency is less than 20%.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"45 ","pages":"Pages 13-27"},"PeriodicalIF":5.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and implementation of a high-performance miniaturized multi-layer magnetic shielding spherical shell with minimal pores based on target magnetic field 基于目标磁场设计并实现具有最小孔隙的高性能微型化多层磁屏蔽球壳

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2024.09.005

Wanqing Li , Wei Li , Shaotao Qu , Shuyi Zhang , Jingyang Xu

{"title":"Design and implementation of a high-performance miniaturized multi-layer magnetic shielding spherical shell with minimal pores based on target magnetic field","authors":"Wanqing Li , Wei Li , Shaotao Qu , Shuyi Zhang , Jingyang Xu","doi":"10.1016/j.dt.2024.09.005","DOIUrl":"10.1016/j.dt.2024.09.005","url":null,"abstract":"<div><div>Achieving the spin-exchange relaxation-free (SERF) state in atomic comagnetometers (ACMs) necessitates a stable and weak magnetic environment. This paper presents the design of a miniaturized permalloy magnetic shielding spherical shell (MSSS) with minimal apertures, tailored to meet these requirements. By employing a combination of analytical solutions and finite element analysis (FEA), we achieved superior magnetic shielding while maintaining a compact form factor. The analytical solution for the shielding factor indicated that a four-layer permalloy sphere shell with optimized air gaps was necessary. A numerical analysis model of the MSSS was developed and validated using COMSOL software, confirming the suitability of the air gaps. The size, shape, and orientation of the openings in the perforated sphere shell were meticulously designed and optimized to minimize residual magnetism. The optimal structure was fabricated, resulting in triaxial shielding factors of 47619, 52631, and 21739, meeting the anticipated requirements. A comparison of simulation results with experimental tests demonstrated the efficacy of the design methodology. This study has significant implications for ultra-sensitive magnetic field detection devices requiring weak magnetic field environments, such as atomic gyroscopes, magnetometers, atomic interferometers, and atomic clocks.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"45 ","pages":"Pages 99-108"},"PeriodicalIF":5.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reactivity of polyaniline composites with attractive cyclic nitramines 聚苯胺与吸引环硝胺复合材料的反应性

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2024.10.009

Veerabhadragouda B. Patil , Roman Svoboda , Svatopluk Zeman

{"title":"Reactivity of polyaniline composites with attractive cyclic nitramines","authors":"Veerabhadragouda B. Patil , Roman Svoboda , Svatopluk Zeman","doi":"10.1016/j.dt.2024.10.009","DOIUrl":"10.1016/j.dt.2024.10.009","url":null,"abstract":"<div><div>Composite microcrystals of the nitramines (NAs) viz., RDX, HMX, BCHMX, and CL-20 with electrically conductive polyaniline (PANi) are a charge transfer complexes in coagglomerated composite crystals (CACs). The activation energies of thermolysis, <em>E</em><sub>a</sub>, of the pure NAs and their PANi-CACs were determined using the Kissinger method, and decomposition processes are discussed. Except for the RDX/PANi CACs, all the other CACs show higher <em>E</em><sub>a</sub> values for decomposition compared to their pure NA counterparts. For all CACs, relationships are specified between the <em>E</em><sub>a</sub> values, on the one hand, and the squares of the detonation velocities, enthalpies of formation, spark energy and impact sensitivities, on the other. The relationships between their low-temperature heats of decomposition, Δ<em>H</em>, from DSC, and their enthalpy of formation, logarithm of impact sensitivity, electric spark energy, as well as detonation energy, are described. The PANi favorably influences the density of the corresponding CACs; surprisingly close linear correlations were found, and explained, between these densities and the <em>E</em><sub>a</sub> values. This presence of PANi strongly increased the electrical spark sensitivity of the CACs in comparison to the base NAs. Based on the results obtained, it can be noted in particular the exceptional desensitization of HMX to impact and the increased sensitivity to electrical spark by coating its crystals with polyaniline.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"45 ","pages":"Pages 1-12"},"PeriodicalIF":5.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research status of high efficiency deep penetration welding of medium-thick plate titanium alloy: A review 中厚板钛合金高效深熔透焊接的研究现状：综述

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2024.08.004

Zhihai Dong , Ye Tian , Long Zhang , Tong Jiang , Dafeng Wang , Yunlong Chang , Donggao Chen

引用次数: 0

Preparation of spherical HMX@PDA-based PBX by co-axial droplet microfluidic technology: Enhancing the interfacial effect and safety performance of composite microspheres 同轴微流控技术制备球形HMX@PDA-based PBX：增强复合微球的界面效应和安全性能

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2024.10.010

Yunyan Guo , Yi Liu , Jiani Xie , Jiawei Li , Fan Wang , Jinshan Lei , Chongwei An , Zhongliang Ma , Bidong Wu

{"title":"Preparation of spherical HMX@PDA-based PBX by co-axial droplet microfluidic technology: Enhancing the interfacial effect and safety performance of composite microspheres","authors":"Yunyan Guo , Yi Liu , Jiani Xie , Jiawei Li , Fan Wang , Jinshan Lei , Chongwei An , Zhongliang Ma , Bidong Wu","doi":"10.1016/j.dt.2024.10.010","DOIUrl":"10.1016/j.dt.2024.10.010","url":null,"abstract":"<div><div>Surface engineering plays a crucial role in improving the performance of high energy materials, and polydopamine (PDA) is widely used in the field of energetic materials for surface modification and functionalization. In order to obtain high-quality HMX@PDA-based PBX explosives with high sphericity and a narrow particle size distribution, composite microspheres were prepared using co-axial droplet microfluidic technology. The formation mechanism, thermal behavior, mechanical sensitivity, electrostatic spark sensitivity, compressive strength, and combustion performance of the microspheres were investigated. The results show that PDA can effectively enhance the interfacial interaction between the explosive particles and the binder under the synergistic effect of chemical bonds and the physical \"mechanical interlocking\" structure. Interface reinforcement causes the thermal decomposition temperature of the sample microspheres to move to a higher temperature, with the sensitivity to impact, friction, and electrostatic sparks (for S-1) increasing by 12.5%, 31.3%, and 81.5% respectively, and the compressive strength also increased by 30.7%, effectively enhancing the safety performance of the microspheres. Therefore, this study provides an effective and universal strategy for preparing high-quality functional explosives, and also provides some reference for the safe use of energetic materials in practical applications.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"45 ","pages":"Pages 73-83"},"PeriodicalIF":5.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143620437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Penetration-deflagration coupling damage performance of rod-like reactive shaped charge penetrator impacting thick steel plates 棒状反应聚能穿甲弹冲击厚钢板的穿透-爆燃耦合损伤性能

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Defence Technology(防务技术) Pub Date : 2025-03-01 DOI: 10.1016/j.dt.2025.02.027

Tao Sun , Haifu Wang , Shipeng Wang , Jie Gong , Wenhao Qiu , Yuanfeng Zheng

{"title":"Penetration-deflagration coupling damage performance of rod-like reactive shaped charge penetrator impacting thick steel plates","authors":"Tao Sun , Haifu Wang , Shipeng Wang , Jie Gong , Wenhao Qiu , Yuanfeng Zheng","doi":"10.1016/j.dt.2025.02.027","DOIUrl":"10.1016/j.dt.2025.02.027","url":null,"abstract":"<div><div>The penetration-deflagration coupling damage performance of rod-like reactive shaped charge penetrator (RRSCP) impacting thick steel plates is investigated by theoretical analysis and experiments. A penetration-deflagration coupling damage model is developed to predict the penetration depth and cratering diameter. Four type of aluminum-polytetrafluoroethylene-copper (Al-PTFE-Cu) reactive liners with densities of 2.3, 2.7, 3.5, and 4.5 g·cm<sup>−3</sup> are selected to conduct the penetration experiments. The comparison results show that model predictions are in good agreement with the experimental data. By comparing the penetration depth and cratering diameter in the inert penetration mode and the penetration-deflagration coupling mode, the influence mechanism that the penetration-induced chemical response is unfavorable to penetration but has an enhanced cratering effect is revealed. From the formation characteristics, penetration effect and penetration-induced chemical reaction behaviors, the influence of reactive liner density on the penetration-deflagration performance is further analyzed. The results show that increasing the density of reactive liner significantly increases both the kinetic energy and length of the reactive penetrator, meanwhile effectively reduces the weakened effect of penetration-induced chemical response, resulting in an enhanced penetration capability. However, due to the decreased diameter and potential energy content of reactive penetrator, the cratering capability is weakened significantly.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"49 ","pages":"Pages 152-164"},"PeriodicalIF":5.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effective implementation of controlled blasting methodology during excavation of hard rock in the close proximity of earthen dam and tunnel 土坝隧道附近硬岩开挖控制爆破方法的有效实施

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Defence Technology(防务技术) Pub Date : 2025-02-28 DOI: 10.1016/j.dt.2025.02.026

Prakash K. Palei, Vijay K. Ghodake, S. Santhosh Kumar, R.S. Gurjar, Chaman Singh, M. Meena, Rizwan Ali, R.S. Kankara

{"title":"Effective implementation of controlled blasting methodology during excavation of hard rock in the close proximity of earthen dam and tunnel","authors":"Prakash K. Palei, Vijay K. Ghodake, S. Santhosh Kumar, R.S. Gurjar, Chaman Singh, M. Meena, Rizwan Ali, R.S. Kankara","doi":"10.1016/j.dt.2025.02.026","DOIUrl":"10.1016/j.dt.2025.02.026","url":null,"abstract":"<div><div>The present technical paper outlines the details of the controlled blasting techniques used to optimize blasting pattern for excavation of hard rock near the Bhira Earthen Dam in Maharashtra, India. In this connection, a series of experimental blasts were conducted by adjusting various blast design parameters at project site. The safe charge weight per delay was kept between 0.125 and 0.375 kg. The outcomes of these experimental blasts were analyzed to recommend optimized blasting patterns and methods for the overall excavation process during actual blasting operations. Blast design parameters, including the maximum quantity of explosive per delay, hole depth, burden and spacing between holes were optimized by using a site-specific attenuation equation, taking into account the proximity of the dam and tunnel from the blasting area. Peak particle velocity (PPV) level of 10 mm/s and 50 mm/s respectively were adopted as the safe vibration level for ensuring safety of the Bhira Earthen Dam and the nearby tunnel from the adverse effects of blast vibrations by analyzing the dominant frequency of ground vibrations observed and also by reviewing various international standards. Frequency of the ground vibrations observed on the dam and tunnel from majority of the blasts was found to be more than 10 Hz and 50 Hz respectively. During the entire period of blasting, the blast vibrations were recorded to be far lower than the safe vibration level set for these structures. Maximum Vibration level of about 0.8 mm/s and 35 mm/s were observed on dam and tunnel respectively which are far lower than the safe vibration level adopted for these structures. Hence, the entire excavation work was completed successfully and safely, without endangering the safety of dam or tunnel.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"48 ","pages":"Pages 306-316"},"PeriodicalIF":5.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144139657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0