Thin-Walled Structures最新文献

{"title":"Experimental and numerical assessment of steel and concrete composite curved panels (SCCCPs) for modular wind turbine tower","authors":"Jafar Mohammadi Tekantappeh,&nbsp;Mariela Mendez-Morales,&nbsp;Carlos Rebelo,&nbsp;Hélder D․ Craveiro,&nbsp;Rui A․ Simões","doi":"10.1016/j.tws.2026.114554","DOIUrl":"10.1016/j.tws.2026.114554","url":null,"abstract":"<div><div>This paper presents an experimental and numerical investigation into the axial performance of six Steel and Concrete Composite Curved Panels (SCCCPs) designed as modular components for a self-erecting wind turbine tower. Both compressive and tensile behaviors were evaluated on scaled specimens, which serve as representative modules of the Self-Erecting Tower (SeT) system. Compression tests revealed that failure was primarily governed by global buckling of the steel frame coupled with concrete crushing, while tensile tests indicated that failure predominantly occurred at the bolted steel connections. High-resolution Digital Image Correlation (DIC) was employed to monitor crack initiation, propagation, and strain distribution across the SCCCPs, additionally providing a detailed insight into damage mechanisms. A finite element model was developed using ABAQUS and calibrated against the experimental results. Following, a Geometrically and Materially Nonlinear Analysis with Imperfections (GMNIA) was performed, accurately capturing both global and local failure modes. The numerically predicted load-displacement responses showed close alignment with the experimental observations. Additionally, a sensitivity study on initial geometric imperfections highlighted their critical impact on axial capacity and panel stability. The modeling approach incorporated material behavior and design parameters consistent with Eurocode provisions, offering a framework that supports future design optimization within standardized European practice. The ultimate resistance of SCCCPs was also calculated based on the design provisions of AISC, CECS, and EC4. Overall, the results validate the structural feasibility and mechanical reliability of the proposed modular concept, highlighting its potential for application in advanced wind turbine tower systems.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114554"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magneto-elastic analysis of thin-walled superconducting solenoids","authors":"Dominik Pridöhl ,&nbsp;Laurenz Klein ,&nbsp;Kai-Uwe Schröder ,&nbsp;Stefan Schael","doi":"10.1016/j.tws.2026.114619","DOIUrl":"10.1016/j.tws.2026.114619","url":null,"abstract":"<div><div>The design of thin-walled superconducting solenoids for particle physics applications requires the consideration of magnet deformations due to self-induced magnetic forces. We present a reduced-order model for these bidirectional magneto-elastic interactions that exploits the inherent axisymmetry of the problem. The developed simulation code allows for the efficient calculation of stresses and deformations in thin-walled solenoids, as well as the magnetic field map of the deformed solenoid.</div><div>The simulation uses two coupled solvers: one for the structural and one for the electromagnetic domain. Magnetic field and Lorentz forces are calculated by a dedicated Biot–Savart solver. The structural solver is based on the Transfer Matrix Method (TMM) for shells of revolution. The coupled problem is solved iteratively by the solvers exchanging updated magnet forces and displacements for increasing current increments. This approach captures geometric non-linearities as well as the non-linear redistribution of magnetic forces due to deformations. The non-linear simulation capabilities are demonstrated by exemplary calculations of the BESS-Polar solenoid. We find deviations up to <span><math><mo>±</mo></math></span> 1% in magnetic field caused by the solenoid’s deformations. Geometric non-linearity is found to have only a minor effect and may thus be neglected for the calculation of magnet deformations. In parametric studies, the magneto-elastic solver is shown to be an order of magnitude faster than commercial finite element solvers. The proven computational efficiency makes the tool well-suited for the preliminary structural design of superconducting solenoids and for the estimation of magneto-elastic effects in future particle physics experiments like AMS-100.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114619"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flexural behaviour of a novel thin-walled UHPC composite sandwich insulated wall panel–Experimental and theoretical investigations","authors":"Yu Bian ,&nbsp;Feng Xiong ,&nbsp;Ye Liu ,&nbsp;Huanlong Ding ,&nbsp;Yi Liao","doi":"10.1016/j.tws.2026.114521","DOIUrl":"10.1016/j.tws.2026.114521","url":null,"abstract":"<div><div>To fully exploit the integrated structural and thermal advantages of precast concrete sandwich insulation panel, this paper proposes a new thin-walled ultra-high-performance concrete (UHPC) composite sandwich insulated wall panel (UCSP). The inner and outer wythes are each made of 20 mm thick UHPC, and anchorage-reinforced and connection-reinforced zones are arranged within the wythes. Experimental studies were conducted on the in-plane shear response and flexural response of UCSPs, comparing the effects of different inter-wythe connection schemes on panel performance. The results show that the flexural failure modes of UCSPs can be categorized into wythe failure and connection-system failure. When the peak shear load of the connection system increased by 29%, the degree of composite action improved by 15% in the elastic stage and 21% in the ultimate stage. For UCSPs with wythe through ribs, their flexural performance was close to that of a sandwich panel under the fully composite limit state. As the connection spacing was reduced by 50%, the flexural stiffness, peak load, and ductility of the UCSP increased by at least 31%, 25%, and 15%, respectively. Although UCSP reduced its self-weight by approximately 60% compared to conventional concrete sandwich panels, it could still withstand a uniformly distributed load of at least 5.4 kN/m² before cracking and exhibited deformation greater than 1/150 of its span at failure, demonstrating its excellent flexural performance. Finally, theoretical calculation models for the flexural bearing capacity and deformation of UCSP were established and verified against the test results. Overall, UCSP overcome the application difficulties of PCSPs in both nonstructural and structural roles.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114521"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bionic design and stability analysis of double-sided different curvature corrugated shells","authors":"Cunyao Shan ,&nbsp;Jianliang Sun","doi":"10.1016/j.tws.2026.114586","DOIUrl":"10.1016/j.tws.2026.114586","url":null,"abstract":"<div><div>This study introduces a double-sided different curvature (DSDC) corrugated shell inspired by the turritella bacillum shell, characterized by the dual effect of local thickness and local curvature on the cylindrical shell. Furthermore, the initial topological optimization operation confirmed the rationality of this design. Corrugated shells can be used for pressure structures of important equipment such as nuclear submarines and Deep-sea space station. This paper establishes a constitutive model for the corrugated shell element, provides three specific examples, and calculates each stiffness term using theoretical methods. The equivalent stiffness was calculated and compared with the finite element analysis (FEA) results. A series of corrugated shells with the same volume and weight were constructed. By combining stability theory, FEA and hydrostatic pressure test, the mechanical behavior of the DSDC corrugated shells was revealed. The results show that the design of the DSDC corrugated shell is correct. The corrugation peaks provide overall support, and the large deformation of the corrugation troughs helps to improve the buckling load. Therefore, DSDC can effectively overcome the cracking of corrugated shells during the post-buckling process, as can be proven by comparison with existing experimental studies. This research improves the stability of corrugated shells and optimizes their failure modes, providing a new approach for innovative design of corrugated shells.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114586"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimized vibration and acoustic control of FGM hull-CS raft system integrating modified variational method and differential evolution algorithm","authors":"Jinpeng Su ,&nbsp;Shanlu Lv ,&nbsp;Run Tao ,&nbsp;Zhichao Lv ,&nbsp;Zhiyang Lei","doi":"10.1016/j.tws.2026.114589","DOIUrl":"10.1016/j.tws.2026.114589","url":null,"abstract":"<div><div>This paper presents a vibro-acoustic analysis and parameter optimization method for a submerged Functionally Graded Material (FGM) shell with floating raft isolation system. The Corrugated Sandwich (CS) structure is employed for the raft to make full use of its light weight and high stiffness. A semi-analytical method of high accuracy and efficiency is developed for the vibro-acoustic analysis. In the proposed method, deformations of the FGM hull are characterized via the first-order shear deformation theory (FSDT), acoustic pressure in the fluid field is formulated using Helmholtz equations, and bidirectional fluid-structure coupling is realized through interface displacement continuity conditions and work terms from acoustic pressure. The 3D coupling problem is analytically reduced to 2D problem by Fourier series expansion of displacement and pressure components, while the proposed modified variational principles allows flexible basis functions to achieve accurate numerical solutions. The semi-analytical method is then integrated with a genetic evolutionary algorithm for multi-objective optimization of the key material parameters of the coupled system. This algorithm exhibits fast convergence speed (basically converging after 20 iterations) and the capability of achieving both global and local optimization, thus overcoming the local optimum limitation of traditional gradient-based methods. The influences of the composite materials on vibro-acoustic control using floating raft system are examined. Optimal structural parameters of the CS raft are then determined, providing theoretical support and optimization method for the design of low-vibration and quiet coupled composite shells.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114589"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acoustic black hole structures for vibration reduction of orthotropic steel bridge decks","authors":"Xun Zhang ,&nbsp;Yingming Zhen ,&nbsp;Enchi Hu ,&nbsp;Yinhui Bao ,&nbsp;Keer Cui ,&nbsp;Xianchao Fu ,&nbsp;Anqing Hu","doi":"10.1016/j.tws.2026.114548","DOIUrl":"10.1016/j.tws.2026.114548","url":null,"abstract":"<div><div>Steel bridges are extensively utilized due to their superior mechanical properties and consistency with sustainable development objectives. However, the challenges of vibration and structure-borne noise induced by moving vehicle loads remain unresolved. This study presents a vibration mitigation concept for steel bridges based on the acoustic black hole (ABH) theory, in which variable-thickness U-rib stiffened panels are treated as ABH structures. Considering the periodic arrangement of U-ribs, the finite element method is employed to examine variations in vibration bandgap characteristics and attenuation performance across different frequency ranges. The results demonstrate that, compared to equivalent uniform-thickness U-rib panels of identical mass and rib height, the ABH-U rib stiffened panels broaden the overall bandgap width and modify the bandgap distribution. The ABH-U plates exhibit significant vibration reduction both within and beyond the band gaps. Parametric analysis indicates that tuning the structural parameters of ABH-U plates enables customized vibration control within specific frequency ranges. Among these parameters, the maximum thickness of the variable-thickness U-rib exerts a strong effect on vibration suppression. A case study on a practical steel box-girder segment shows that incorporating ABH-U ribs into the steel box girder achieves measurable vibration reduction across both bandgap and full frequency ranges, with particularly remarkable performance in controlling transverse vibrations. Proper design of U-rib parameters ensures more desirable vibroacoustic performance within the targeted frequency bands.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114548"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146039001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Defect-state acoustic metamaterial based on Helmholtz-Trampoline synergy for low-frequency acoustic energy harvesting","authors":"Chuan He,&nbsp;Shihao Tang,&nbsp;Feifei Feng,&nbsp;Lei Diao,&nbsp;Meng Tao","doi":"10.1016/j.tws.2026.114505","DOIUrl":"10.1016/j.tws.2026.114505","url":null,"abstract":"<div><div>Acoustic energy harvesting offers a promising pathway towards self-powering microelectronic devices, yet current solutions are inherently limited by low power output and restricted operational bandwidth. To overcome these limitations, we introduce a point-defect acoustic metamaterial architecture that synergistically integrates a spiral-neck Helmholtz resonance (HR) with the trampoline effect. The core innovations involve incorporating a spiral neck design within the HR to extend the acoustic path, substantially lowering the resonant frequency for efficient low-frequency acoustic energy capture. Additionally, strategically patterned perforations are introduced in the aluminum substrate surrounding the piezoelectric element to induce a trampoline effect, significantly enhancing substrate compliance and thereby boosting resonance response and energy harvesting efficiency. Finite element method simulations demonstrate that the proposed structure achieves high peak power outputs and voltages at both localized and structural resonance frequencies, yielding superior power densities compared to conventional designs. Parametric studies confirm that the perforations substantially enhance acoustic energy harvesting efficiency. The structure exhibits exceptional environmental robustness, maintaining high performance across a wide range of incident sound pressures. Comparative analysis reveals significant advantages over state-of-the-art designs in output power, voltage, and power density. Experimental validation of transmission loss and acoustic energy harvesting performance shows excellent agreement with simulations, confirming the design efficacy. This metamaterial offers an efficient and sustainable powering strategy for microelectronic devices like sensors and monitors.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114505"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temperature-dependent mechanical properties and crashworthiness of foam-filled spiral tube","authors":"Geng Luo ,&nbsp;Zhaofei Zhu ,&nbsp;Jieqiong Zhang ,&nbsp;Yike Wang ,&nbsp;Pu Xue ,&nbsp;Yisong Chen","doi":"10.1016/j.tws.2026.114510","DOIUrl":"10.1016/j.tws.2026.114510","url":null,"abstract":"<div><div>Thin-walled structures are widely employed in engineering protection at diverse environmental temperatures because of their superior energy-absorption capacity. This study developed a foam-filled spiral tube (FFST) to further improve the crashworthiness of thin-walled structures and systematically investigated its temperature-dependent mechanical behavior and energy-absorption characteristics. A combined experimental-numerical approach was adopted: finite-element models based on Voronoi diagrams were validated through quasi-static tests in a temperature chamber (−20 to 45 °C), followed by a parametric analysis. The results indicated that low temperatures increased the brittleness of the foam, leading to cell-wall fracture and lateral shear deformation. As the temperature increased, the deformation mode transitioned to plastic-hinge-dominated buckling, followed by stable layer-by-layer compaction. When the temperature increased from −20 to 45 °C, the specific energy absorption (<em>SEA</em>) decreased by 76.7 %, while the ultimate load-carrying capacity (<em>ULC</em>) decreased by 45.8 %. These findings demonstrate that although elevated temperatures reduce the energy-absorption capacity of the foam, they improve the smoothness of the deformation process and enhance the stability of the energy-absorption performance. For spiral tubes (STs), small amplitudes and long wavelengths induce asymmetric, unstable deformation, whereas increasing the amplitude or reducing the wavelength improves the geometric stability. Elevated temperatures reduce structural strength and <em>SEA</em>, and STs with small corrugation parameters exhibit temperature-sensitive load capacities owing to their potential for thermal instability. Foam filling enhances the <em>SEA</em> but may exacerbate the deformation instability of small-parameter STs at high temperatures. Geometric optimization can offset foam performance degradation and improve crashworthiness. The interaction analysis revealed that at low temperatures, foam protrusions enhanced interlocking, whereas at high temperatures, sliding friction dominated and diminished the energy contribution. Larger amplitudes stabilize axisymmetric crushing but limit foam penetration, whereas longer wavelengths increase the contact area but may aggravate global instability under volumetric expansion. These findings clarify the temperature-dependent deformation mechanisms and foam-tube interactions of the FFST and offer theoretical guidance for the design of temperature-adaptive energy-absorbing structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"222 ","pages":"Article 114510"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A durability evaluation method for CFRP-reinforced circular hollow section joints in a neutral salt spray environment","authors":"Lewei Tong ,&nbsp;Tiantian Wang ,&nbsp;Xiaoming Xu ,&nbsp;Weizhou Shi ,&nbsp;Feng Gao ,&nbsp;Madhup Pandey ,&nbsp;Fangying Wang","doi":"10.1016/j.tws.2026.114641","DOIUrl":"10.1016/j.tws.2026.114641","url":null,"abstract":"<div><div>The durability of carbon fibre-reinforced polymer (CFRP) strengthened steel structures is a critical issue affecting their long-term reliability in practical engineering applications. However, the degradation behavior and durability of CFRP-strengthened circular hollow section (CHS) joints have not been quantified. This study proposed a numerical analysis method for assessing the durability of CFRP strengthened CHS joints based on experiments. First, durability tests in a neutral salt spray environment and tensile failure tests were conducted on the adhesive and CFRP sheets to obtain moisture diffusion parameters and establish mechanical performance formulae. Static tests were conducted on unaged and aged CFRP-reinforced CHS T-joints. Then, FE models of bare and CFRP-reinforced CHS joints were developed. In the models of CFRP-reinforced joints, mechanical property degradation of the CFRP composite layers and the CFRP-to-steel bonding interfaces were considered. FE models of CFRP composite layers and the bonding interface were developed for mass diffusion analysis. A coupled diffusion-mechanical analysis program was proposed to predict the joint’s durability year, which was verified by experimental results. Finally, the effects of interface moisture diffusion coefficient, CFRP length, and number of CFRP layers on the durability year were analyzed. Suggestions were proposed to improve the durability performance of CFRP-reinforced CHS joints. The proposed method provides an effective tool for predicting the long-term performance of CFRP-reinforced CHS joints and supports durability design.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114641"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A shear deformable beam theory with two-rotational angle cross-sections for the analysis of steel beams with area losses: FEM and experimental validations","authors":"Phe Van Pham ,&nbsp;Cao Thi Mai Huong ,&nbsp;Nguyen Xuan-Huy ,&nbsp;Le Dang Dung ,&nbsp;Tinh Quoc Bui ,&nbsp;Tran Anh Tuan ,&nbsp;Bui-Tien Thanh","doi":"10.1016/j.tws.2026.114622","DOIUrl":"10.1016/j.tws.2026.114622","url":null,"abstract":"<div><div>This work describes the development and validation of an innovative shear deformable beam theory and conducts an experimental study designed for the elastic analysis of steel beams suffering from area losses, such as those caused by corrosion. This new theory introduces a kinematic model postulating two distinct rotation angles for cross-sections to accurately account for the complex shear deformations and stiffness reductions observed in damaged sections, which classical theories often fail to predict. The authors validate their proposed finite element formulation against extensive experimental data and three-dimensional finite element analyses (3D FEA), demonstrating that their approach provides structural response predictions—including deflections, and longitudinal normal and transversal shear stresses—with high accuracy and significantly reduced computational effort compared to 3D FEA. The research concludes that area losses, particularly their length, substantially increase beam deflections and stresses, underscoring the need for this improved analytical method.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"223 ","pages":"Article 114622"},"PeriodicalIF":6.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}