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Compact Bandwidth-Enhanced 180-Degree Phase Shifter Using Edge-Coupled Multi-Microstrip and Artificial Transmission Line.

Compactness has obtained sufficient importance in wideband phase shifter design considerations, as it is directly related to fabrication cost. In this paper, a novel structure was presented to create compact broadband 180-degree phase shifter, which has the advantages of enhanced bandwidth and significantly reduced chip area. The proposed configuration consists of edge-coupled multi-microstrip lines (ECMML) and an artificial transmission line (ATL) with dual-shorted inductors, both of which have the periodic shunt load of capacitors. The ECMML can provide a high coupling coefficient, leading to an increase in the bandwidth, while the introduced capacitors can greatly reduce the line length (35.8% of the conventional method). To verify the relevant mechanisms, a wideband switched network with compact dimensions of 0.67 × 0.46 mm2 was designed via 0.15-micrometer GaAs pHEMT technology. Combined with the measured switch transistor, it was shown that the proposed phase shifter exhibits an insertion loss of less than 2 dB, a return loss of greater than 12 dB, a maximum phase error of less than 0.6° and a channel amplitude difference of less than 0.1 dB in the range of 10 to 20 GHz.

A refined quasi-3D isogeometric model for dynamic instability of graphene nanoplatelets-reinforced porous sandwich plates

This study pays attention to the dynamic instability behavior of advanced sandwich plate structures subjected to periodic in-plane compressive loads. By utilizing a powerful and efficient computational approach based on a four-variable refined quasi-3D plate theory and NURBS-based isogeometric analysis (IGA), the dynamic behavior of structures can be accurately evaluated while accounting adequately for the thickness stretching effect of normal deformation. To investigate the dynamic instability behavior, this study examines sandwich plate models that consist of two graphene nanoplatelets (GNPs)-reinforced skin layers and a porous core layer with two typical distributions of internal porosity: uniform and symmetric dispersion. Bolotin's method is applied in this study to solve the Mathieu–Hill equation and obtain the boundary of dynamic instability zones. Numerical examples are performed to examine the influence of various input parameters on the instability regions, as well as to provide new insights into the dynamic instability behavior of advanced sandwich plates under compressive loading which has not been comprehensively studied in the literature. The findings of this study suggest that the thickness stretching effect should be carefully evaluated for moderate to thick plate structures, such as sandwich plates.

Micromechanical behavior of cement-treated base materials incorporating recycled crushed aggregates arising from C&D waste powder based on DEM

A numerical simulation of the uniaxial compression test (UCT) was conducted based on the discrete element method (DEM), to investigate the mechanical properties of CTBM incorporating recycled crushed aggregates (RCAs) arising from construction waste powder. The components of CTBM were generated via the randomization method to obtain a 2D DEM model. Then, the Linearcbond Model and Linearpbond Model were selected, and the effects of the main micro-parameters of contact models on the stress–strain curves of CTBM were clarified. The final micro-parameters were determined through the trial and error method and inversion analysis. Moreover, the micromechanical results presented that the contact forces between particles during the whole loading process increased continuously until damage occurred. And the contacts between particles failed at the middle and later loading stages, especially the tension contacts. The contact number of the Linearcbond Model reduced significantly, while that of the Linearpbond Model only decreased by 2.6%. Furthermore, the upper and lower particles moved to the mid-span of the specimens, and the particles in the middle moved to both sides when loading. The displacement on both sides was larger due to the failure of the specimen in the middle and later loading periods. The presented 2D DEM has the potential to display the mechanical characteristics of CTBM. It also provides theoretical guidance for the wide application of RCAs due to their great economic and environmental benefits.

QCT-based computational bone strength assessment updated with MRI-derived ‘hidden’ microporosity

Microdamage accumulated through sustained periods of cyclic loading or single overloading events contributes to bone fragility through a reduction in stiffness and strength. Monitoring microdamage in vivo remains unattainable by clinical imaging modalities. As such, there are no established computational methods for clinical fracture risk assessment that account for microdamage that exists in vivo at any specific timepoint. We propose a method that combines multiple clinical imaging modalities to identify an indicative surrogate, which we term ‘hidden porosity’, that incorporates pre-existing bone microdamage in vivo. To do so, we use the third metacarpal bone of the equine athlete as an exemplary model for fatigue induced microdamage, which coalesces in the subchondral bone. N = 10 metacarpals were scanned by clinical quantitative computed tomography (QCT) and magnetic resonance imaging (MRI). We used a patch-based similarity method to quantify the signal intensity of a fluid sensitive MRI sequence in bone regions where microdamage coalesces. The method generated MRI-derived pseudoCT images which were then used to determine a pre-existing damage (Dpex) variable to quantify the proposed surrogate and which we incorporate into a nonlinear constitutive model for bone tissue. The minimum, median, and maximum detected Dpex of 0.059, 0.209, and 0.353 reduced material stiffness by 5.9%, 20.9%, and 35.3% as well as yield stress by 5.9%, 20.3%, and 35.3%. Limb-specific voxel-based finite element meshes were equipped with the updated material model. Lateral and medial condyles of each metacarpal were loaded to simulate physiological joint loading during gallop. The degree of detected Dpex correlated with a relative reduction in both condylar stiffness (p = 0.001, R2 > 0.74) and strength (p < 0.001, R2 > 0.80). Our results illustrate the complementary value of looking beyond clinical CT, which neglects the inclusion of microdamage due to partial volume effects. As we use clinically available imaging techniques, our results may aid research beyond the equine model on fracture risk assessment in human diseases such as osteoarthritis, bone cancer, or osteoporosis.

Dynamic Characteristics and Effective Stiffness Properties of Sandwich Panels with Hierarchical Hexagonal Honeycomb.

The dynamic characteristics of sandwich panels with a hierarchical hexagonal honeycomb (SP-HHHs) show significant improvements due to their distinct hierarchy configurations. However, this also increases the complexity of structural analysis. To address this issue, the variational asymptotic method was utilized to homogenize the unit cell of the SP-HHH and obtain the equivalent stiffness, establishing a two-dimensional equivalent plate model (2D-EPM). The accuracy and effectiveness of the 2D-EPM were then verified through comparisons with the results from a detailed 3D FE model in terms of the free vibration and frequency- and time-domain forced vibration, as well as through local field recovery analysis at peak and trough times. Furthermore, the tailorability of the typical unit cell was utilized to perform a parametric analysis of the effects of the length and thickness ratios of the first-order hierarchy on the dynamic characteristics of the SP-HHH under periodic loading. The results reveal that the vertices serve as weak points in the SP-HHH, while the vertex cell pattern significantly influences the specific stiffness and stiffness characteristics of the panel. The SP-HHH with hexagonal vertex cells has superior specific stiffness compared to panels with circular and rectangular vertex cells, resulting in a more lightweight design and enhanced stiffness.

Performance Analysis of Multiple Steel Corrugated Pipe Arch Culvert under Construction and Periodic Vehicle Load

The arrangement of multiple culverts has gradually increased in road engineering. However, the arrangement will face a series of risks in both the construction and operation stages. A numerical model was established to analyze the construction and operation safety of multiple steel corrugated pipe arch culverts by using a fully fluid–solid coupling two-dimensional (2D) model of a highway project. The sensitivity of factors affecting the settlement of the composite foundation such as modulus and depth of ground reinforcement was discussed. Based on the results of the 2D model, a fully fluid–solid coupling three-dimensional (3D) model was established to study the influence of dynamic cyclic vehicle load on the mechanical properties of multiple steel corrugated pipe arch culverts. The ground deformation, soil stress and pore pressure, structure stress, and deformation were analyzed. The results show that the maximum settlement of the soil in the arch culvert area is at the junction of the two different arch culverts after construction. The maximum vertical deformation of the structure appears at the vault, and the arch waist is prone to stress concentration. Under cyclic vehicle dynamic load, the ground deformation, structural stress, and arch culvert subgrade deformation showed a rapid growth stage, and then tended to be stable. The weak points in the structure during the construction and operation stages were revealed, which can provide a useful reference for the design and construction of multiple steel corrugated pipe arch culverts.

Evaluating the Role of Integrated Photovoltaic and Energy Storage Systems in the Net-Zero Transition: A Case Study in Taiwan

This study investigates the role of integrated photovoltaic and energy storage systems in facilitating the net-zero transition for both governments and consumers. A bi-level planning model is proposed to address the challenges encountered by existing power supply systems in meeting the escalating electricity demands. In the upper level, governments provide incentives to users through subsidies for photovoltaic power generation, energy storage system installations, and electricity procurement. Meanwhile, at the lower level, load requirements are optimized, and costs are minimized by integrating solar power generation, battery energy storage, and electricity procurement. To effectively address these complexities, a hybrid physics-inspired algorithm for bi-level programming is utilized for iterative problem solving. The findings indicate that relying on photovoltaic output during peak load periods and conducting small electricity purchases, while storing excess electricity, proves to be an efficient approach. This model offers a cost-effective solution for managing energy consumption, mitigating potential power shortages, and reducing frequent outages. Furthermore, this research contributes to a comprehensive understanding of the net-zero transition and its implications for power supply systems. Specifically, it highlights the significance of integrated photovoltaic and energy storage systems in assisting businesses with specific energy storage planning, determining optimal charging and discharging schedules, and considering government subsidies.

Analysis of nonlinear rheological consolidation with vertical drains: large or small strain

Given the importance of vertical drainage systems in facilitating the stability of soft ground, this paper presents a feasibility study of small-strain consolidation solutions with vertical drains and a quantitative comparison with large-strain consolidation solutions. This solution incorporates essential factors, such as non-Darcian vertical and radial flows, nonlinear void ratio and permeability relationship, initial self-weight stress, elastic viscoplastic constitutive equation, and time-dependent loading. In the design of vertical drains for large and small deformation consolidation equations are comprehensively addressed. The numerical results obtained by the finite difference method demonstrate that the conventional small-strain consolidation method for soft clay has the potential to overestimate the dissipation of excess pore pressure and underestimate the settlement at the later stage, yet correctly assess the effective stress reduction during the initial loading period. Based on the comparison of consolidation data, the relative difference in settlement between large-strain and small-strain consolidation theories will exceed 5% as the accumulated vertical strain reaches about 13%. Another threshold exists for the ratio of the soil thickness to the influence radius (H / r e) to affect the consolidation rate, whether or not the self-weight stress is captured.

Guided wave ultrasonic feature determination in Type IV composite overwrapped pressure vessels towards the digital twin

The digitalization of quality control processes and the underlying data infrastructures for safety relevant components, such as hydrogen pressure vessels, plays a significant role in the transition towards Industry 4.0. In the current safety regulations for hydrogen pressure vessels, there is no established concept for structural health monitoring. The development of a reliable structural health monitoring methodology for monitoring the structural integrity of pressure vessels enables a fast-forward transition from personnel- and costintensive recurring inspections, a.k.a. periodic maintenance, to predictive maintenance. In the work presented; we investigated the application of ultrasonic guided wave propagation to monitor and assess the condition of Type IV composite overwrapped pressure vessel (COPV). A sensor network of fifteen piezo-electric wafers is placed on the carbon fibre reinforced composite cylinder. Five different artificial damage configurations are created by gluing two different weight blocks on three different locations. The database containing measured guided wave data sets is enriched by two different boundary conditions. We utilized an open-source software, openBIS labnotebook, to store and analyse experimental datasets. The guided wave ultrasonic signals were investigated and analysed by using commonly used ultrasonic features (e.g., amplitude, frequency, time of flight) as well as non-traditional time-series features (kurtosis, skewness, variance). The features were used to calculate damage index and the detection performance for the results has been evaluated. The results suggest that both traditional and non-traditional features assume significant importance in artificial damage detection. The future works will additionally involve the impacts of operational conditions, such as periodic pressure variations temperature loadings as well as material degradations.

Improvement of the service life of mining and industrial equipment by using friction modifiers

Purpose. Enhancement of the performance, service life and sustainability of industrial vehicles, mining machinery and various equipment by reducing the friction coefficient. Methodology. Laboratory research on assessing the interaction of friction pairs under external loading, rolling, and sliding in dry friction conditions, as well as the influence of friction modifiers. Industrial experimental studies on the performance indicators of mining machinery under the influence of friction modifiers. Findings. Actual diagrams depicting changes in the friction coefficient between the contacting surfaces of disc pairs were obtained for four specific loading periods and corresponding pressures of 529, 374, 274 and 187 MPa. These measurements were taken while the discs experienced a 10 % relative slippage and cyclic load interaction during the testing of specimens, with the presence of the repair-recovery compound called “Ideal” and without it, using only dry friction. The new technologies and the new repair-recovery compound “Ideal”, developed at the Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, provide an exceptionally low friction coefficient of 0.04–0.005 and ensure the durability of the protective layer under dry friction before failure, reaching 80–100 thousand cycles at a specific pressure of 529 MPa. At a specific pressure of 187–374 MPa, the protective layer under dry friction provides up to 1 million cycles of interaction. Originality. The unique properties of the combination of the “Ideal” tribotechnical composition, which forms a metal-ceramic, superhard, refractory, and wear-resistant nanostructured layer on a metal base, have been established. This layer provides protection against wear, dynamic loads, thermal and oxidative degradation, and increases the service life of friction units in industrial equipment by 3–10 times. Practical value. Based on the results of experimental and acceptance tests of the “Ideal” repair-recovery compound, a decrease in friction coefficient values and an extension of the service life of highly loaded gear mechanisms in mining and industrial equipment by 1.4–2.0 times have been established. It has been found that the protective layer provided by the “Ideal” repair-recovery compound helps reduce the wear mass of friction surfaces by 20 times in the tested samples, ensuring cleanliness of lubricants in equipment and increasing their operational lifespan while saving on maintenance costs.

DYNAMIC ANALYSIS OF THE FOOTBRIDGE EXPOSED TO PEDESTRIAN LOADING

The submitted paper is dealing with the phenomenon of the human induced vibration caused by walking pedestrians. Pedestrians naturally work as a source of a periodic load, which is typically in the resonance range with some of the natural frequencies of the crossed footbridge. Typical pacing frequency of the normal walk is close to 2 Hz. Unfortunately, the most of footbridges have some of the natural frequencies in the range 1.5 – 3 Hz. These values can be easily reached by pedestrians, which could lead to the uncomfortable level of the structural vibration as could be seen at the Millennium bridge in London. In the submitted paper, we are going to subject the footbridge, acting as the simply supported beam, to the theoretical dynamic analysis. The dynamic analysis will be divided into the modal analysis and the force vibration analysis, which is accomplished by the modal decomposition method. This approach allows us to execute direct integration of the independent equations of motion. Total number of these modal equations is significantly less than number of equations directly assembled by the Finite element method. The pedestrians will be mathematically described by the periodic shifting force with constant velocity of motion.

Study on multibody contact load distribution characteristics of scraper conveying system of continuous miner

Understanding the interaction of the scraper chain–sprocket–tail drum–chain path is of great significance to improving the transportation efficiency and service life of the intermediate scraper conveying system of fully mechanized excavation equipment. The dynamic characteristics of the internal tension, running resistance, and multicontact interface load of the scraper chain are the theoretical basis of the research. Firstly, a method for obtaining periodic cyclic dynamic load history is proposed, and then the model of a single-chain scraper conveyor for a continuous shearer is constructed by using RecurDyn and simulation structures. Finally, the influence of parameters such as conveying inclination angle and running speed of the sleeve scraper chain on the reliable operation of the conveying system is determined. The results show that when the conveying angle is 12°, the scraper conveying system runs stably and the impact between multirigid bodies is small. As the chain speed increases from 0.85 to 2.4 m/s, the wear of the conveying system gradually increases, and the contact load distribution of upper chain plate 2, upper chain plate 3, and lower chain plate 3 is seriously worn.

Impacts of UHI on Heating and Cooling Loads in Residential Buildings in Cities of Different Sizes in Beijing–Tianjin–Hebei Region in China

The heating and cooling energy consumption levels of urban buildings account for a large and rapidly growing proportion of the total end-use energy consumption of society. The urban heat island (UHI) effect is an important factor influencing the spatiotemporal variations in the heating and cooling energy consumption levels of buildings. However, there is a lack of research on the impact of the UHI on the heating and cooling energy consumption of buildings in cities of different sizes in the Beijing–Tianjin–Hebei urban agglomeration, which is the most urbanized region in northern China. We selected rural reference stations using the remote sensing method, and applied an hourly data set from automatic weather stations, to examine the impact of the UHI on the typical residential building heating and cooling loads in three cities of varied sizes in the Beijing–Tianjin–Hebei urban agglomeration through building energy simulation. The main conclusions were as follows. As the UHI intensity (UHII) increased, the heating load difference between urban and rural areas decreased, while the cooling load difference between urban and rural areas increased in the cities. The average daily heating loads in the urban areas of Beijing, Tianjin, and Shijiazhuang were 8.14, 10.71, and 2.79% lower than those in their rural areas, respectively, while the average daily cooling loads in the urban areas were 6.88, 6.70, and 0.27% higher than those in their rural areas, respectively. Moreover, the absolute hourly load differences between urban and rural areas were significantly larger during the heating periods than during the cooling periods, with the former characterized by being strong at night and weak during the day. During the peak energy load period, the contribution of the UHI to the peak load of residential buildings varied between the cities. During the stable high-load period, from 18:00 to 07:00 the next day in the heating periods (from 18:00 to 05:00 the next day in the cooling periods), the hourly loads in the urban areas of Beijing, Tianjin, and Shijiazhuang were 3.15 (2.48), 3.88 (1.51), and 1.07% (1.09%) lower (higher) than those in their rural areas, respectively. Our analysis highlights the necessity to differentiate the energy supplies for the heating and cooling of urban buildings in different sized cities in the region.

Mechanical properties and application of superconducting materials of Nb3Sn

Nb3Sn is one of the most promising low temperature superconducting materials and its high critical current density, high critical magnetic field strength and high critical transition temperature have attracted a lot of attention in many application areas. However, the superconductivity of Nb3Sn is strongly sensitive to its mechanical behaviour. The strain and torque arise from tension during cabling and electromagnetic forces during working operation can affect the critical performance of the strand. In this paper, the development of superconducting materials was firstly introduced in a brief way. Subsequently, the paper focused on several experiments to test the mechanical properties. Devices such as Pacman and TRASIS are used to measure the axial strain/stress, transverse force, spatial periodic contact loading cycles and periodic bending. In the next section, the paper introduced the applications and finally drew a conclusion. These results shed light on guiding future studies focusing on Nb3Sn and lay a foundation for subsequent mechanical studies of Nb3Sn.

Complex dynamics, released energy, and multistability in a single-layered graphene sheet under periodic loads

Graphene was found in 2004. It’s a carbon allotrope built around a single layer of atoms organized in a two-dimensional (2D) honeycomb lattice nanostructure. In the contribution, the complex behavior of a graphene sheet under periodic loads is investigated using the usual nonlinear analysis tools. From the dynamic states and the material’s symmetry investigations, it is found that the graphene model considered in this work can exhibit the simultaneous existence of up to six different patterns by varying initial conditions for fixed parameters. The Helmholtz theorem is also used to calculate the Hamilton energy of excited graphene. As a result, when the damping coefficient and the nonlocal parameter were close to zero, the system’s energy was null. This supports the fact that when graphene is in its resting state, vibrations are null inside the material. In contrast, when the damping coefficient and the nonlocal parameter were simultaneously increased, the energy of the graphene sheet increased until it reached a peak value, justifying the oscillations observed in the material. The dependency of the material on the initial condition is also used to support the coexistence of the energy found.

Operation optimization of battery swapping stations with photovoltaics and battery energy storage stations supplied by transformer spare capacity

AbstractDriven by the demand for carbon emission reduction and environmental protection, battery swapping stations (BSS) with battery energy storage stations (BESS) and distributed generation (DG) have become one of the key technologies to achieve the goal of emission peaking and carbon neutrality. Therefore, this paper proposes a strategy to optimize the operation of BSS with photovoltaics (PV) and BESS supplied by transformer spare capacity. Firstly, it introduces the operation mechanism of BSS and uses the spare capacity of building special transformers and the roof PV to supply power to BSS to avoid the investment of transformers. Secondly, this paper establishes the load model of BSS and proposes the charging rules of battery swapping. Thirdly, a segmented pricing mechanism for the rental price of special transformers is formulated to guide BSS operators to preferentially rent spare capacity during low load rate periods. Aiming at the maximum daily profit of BSS, an optimization model is established to optimize the number of batteries to be charged and the charging status of BESS in each period; on this basis, the demand response model is further proposed. Simulation results show that the proposed strategy can improve the daily profit of BSS through shifting load. And the configuration of BESS can improve the battery swapping capacity and peak‐shaving ability. Moreover, the exponential segmented pricing mechanism can greatly reduce the number of high load periods and reduce the burden on the power supply.

Assessment of dynamic instability of thin nanoplates considering size and surface energy effects

The stated goal of this study is to comprehensively understand the dynamic instability characteristics of thin nanoplate structures, taking into account the combined effects of both size and surface energy. To achieve this, we present a computational approach based on the non-classical Kirchhoff plate theory within the framework of NURBS-based isogeometric analysis (IGA). The modified couple stress theory, which includes one material length scale parameter, is implemented to adequately account for the size-dependent effect. Additionally, the Gurtin–Murdoch surface elasticity is effectively utilized to assess the influence of surface energy. For the first time, we explore the dynamic instability regions of thin nanoplates, accounting for both size and surface energy effects simultaneously. To obtain solutions from the Mathieu-Hill equations, the Bolotin method is applied in this research. A number of numerical investigations on square, circular and annular thin nanoplate models under periodic in-plane compressive loads are conducted to assess the influence of several crucial input factors on the regions of dynamic instability. The present outcomes reveal that both size and surface energy effects have a remarkable influence on the dynamic instability characteristics of the nanoplates. Accordingly, these effects contribute to an enhancement in structural rigidity at the small-scale level. Furthermore, we explore that in the case of ultra-thin nanoplates, the influence of surface energy becomes dominant. The obtained findings provide valuable insights into the behavior of thin nanoplates under dynamic in-plane loading conditions as well as can contribute to the design of more robust engineering structures.

Effect of Static Loading States on the Compressional Behavior of Foam Glass Aggregate

In this study, two groups of foam glass aggregate (FGA) samples were prepared with four different compaction ratios (10%, 20%, 30%, and 40%) and subjected to a series of static compressional loads from 50kPa to 300kPa with 50kPa interval. In first group of the test (changed load samples, ChLS), for each static load value, a new sample was prepared and tested. In the other group of the test (continuously loaded samples, CLS), all prescribed static compressional loads were sequentially applied over the same sample after satisfying the required strain rate at each load. The results revealed that the overall vertical strain values of CLS were lower than ChLS except for 10%, which shows reverse behavior. For both sample types, the required time to reach the desired vertical strain rate was much higher when the compaction ratio was low, and the compressional load was above 250 kPa. The compaction methodology used in the present study led to more reliable vertical strain values for both short- and long-term loading periods compared to other reported results executed on FGA under the same static compressional load circumstances. The evolution in the particle distribution curve of FGA particles after maximum compaction ratio (40%) was nonsignificant compared to the study works that depended on traditional standard test methods of compaction and led to severe change in particles structural component. The current findings beneficially affect civil engineering applications using FGA by defining the material's final strain values when subjected to static compressional loads at different compaction ratios.

Development of an efficient, ready to use, blood platelet-release device based on two new flow regime parameters: The periodic hydrodynamic loading and the shear stress accumulation.

In vitro production of blood platelets for transfusion purposes is gaining interest. While platelet production is now possible on a laboratory scale, the challenge is to move towards industrial production. Attaining this goal calls for the development of platelet release devices capable of producing large quantities of platelets. To this end, we have developed a continuous-flow platelet release device composed of five spherical chambers each containing two calibrated cones placed in a staggered configuration. Following perfusion of proplatelet-bearing cultured megakaryocytes, the device achieves a high yield of about 100 bona-fide platelets/megakaryocyte, at a flow rate of ∼80 mL/min. Performances and operating conditions comply with the requirements of large-scale platelet production. Moreover, this device enabled an in-depth analysis of the flow regimes through Computational Fluid Dynamics (CFD). This revealed two new universal parameters to be taken into account for an optimal platelet release: i.e. a periodic hydrodynamic load and a sufficient accumulation of shear stress. An efficient 16 Pa.s shear stress accumulation is obtained in our system at a flow rate of 80 mL/min.

Out-of-plane dynamic instability of functionally graded porous circular arches reinforced by graphene platelets in thermal environment

This paper investigates out-of-plane dynamic instability for functionally graded porous (FGP) graphene platelets reinforced composites (GPLRC) circular shallow arches subjected to a radial periodic concentrated load in a thermal environment for the first time. Hamilton principle is employed to derive the differential equations of motion of the arches associated with out-of-plane displacements. The dynamic instability regions (DIR) with period 2T are determined by using Bolotin’s method and verified by finite element software ANSYS. The effects of uniform temperature difference,out-of-plane boundary condition, pore distribution mode, the weight fraction of graphene platelets (GPLs), GPLs dimension coefficients, and the location of the concentrated periodic load on the DIRs are comprehensively analyzed. The results show that higher temperature difference can weaken the dynamic stability of the arch. The load position has no influence on the boundary excitation frequency at the lowest point of the DIR but plays a negative impact on the area of the DIRs and a positive influence on the lowest value of the load. The parametric resonance of the arch is more likely to occur if the concentrated periodic load is located near the arch crown.