The small‐scale‐dependent nonlinear dynamical attributes of microplate‐type laminated piezoelectric systems of harvesting energy subjected to a triangular mechanical actuation are explored in the current exploration. The core of harvesting systems is supposed to be made of nanocomposites reinforced by randomly oriented carbon nanotubes (CNTs) having various degrees of agglomeration coated by piezoelectric layers. In this regard, the microplate‐type systems of harvesting energy are modeled via a quasi‐3D plate theory combined with the modified strain gradient elasticity in the presence of various microsize‐dependent strain gradient tensors. Thereafter, the solution of the developed coupled electromechanical size‐dependent nonlinear problem is obtained numerically by utilizing the meshless collocation approach employing incorporation of the polynomial and radial basis functions to remove any feasible singularity for the associated moment matrices. It comes to the conclusion that by elevating the quantity of CNTs disclosed within the clusters, the significance of the microsize dependency in the achieved voltage enhances from 22.06% to 22.73% toward the simply supported bridge‐type context, and from 33.00% to 33.92% toward the clamped bridge‐type context.Highlights Development of a microstructural‐dependent quasi‐3D shear flexible energy harvester model. Incorporating the roles of various strain gradient tensors in the nonlinear dynamics of microharvesters. Size‐dependent time‐histories of achieved voltage from triangular mechanical‐loaded microharvesters. Influence of the CNT reinforcement clustering on the nonlinear dynamic performance.

中文翻译：

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三角形机械驱动下能量收集微板型压电系统准3D非线性动力学中应变梯度张量的作用

当前的探索中探讨了在三角机械驱动下收集能量的微板型层压压电系统的小尺度相关非线性动力学属性。收集系统的核心应该由纳米复合材料制成，该复合材料由随机取向的碳纳米管（CNT）增强，碳纳米管具有不同程度的团聚，并涂有压电层。在这方面，在存在各种依赖于微米尺寸的应变梯度张量的情况下，通过准3D板理论结合修正的应变梯度弹性对微板型能量收集系统进行建模。此后，通过利用无网格配置方法，结合多项式和径向基函数来消除相关矩矩阵的任何可行奇异性，以数值方式获得所开发的耦合机电尺寸相关非线性问题的解。得出的结论是，通过提高簇内暴露的 CNT 数量，所达到的电压中微米尺寸依赖性的显着性从简支桥型环境中的 22.06% 提高到 22.73%，从 33.00% 提高到 33.92%走向钳制的桥型语境。亮点 开发依赖于微观结构的准 3D 剪切柔性能量采集器模型。 结合各种应变梯度张量在微型收割机非线性动力学中的作用。 三角形机械负载微型收割机获得的电压随尺寸变化的时间历程。 CNT增强簇对非线性动态性能的影响。