推荐 | 逆向工程GPT4free---免费使用GPT模型(BBM和BPM试验)

1 引言

2 教程

为了让大家能顺利使用GPT4free，已经制作了一个在Windows系统下安装和使用的详细教程，一步一步讲解如何安装和使用GPT4free，对此感兴趣的同学可联系本公 众 号，目前支持的API如下图所示。另外，目前开发者已经收到了forefront和phind的拆除请求，因此这两个API可能不再正常工作。

3 试验

The Bonded Block Model (BBM) is a numerical rock mechanics modeling approach used in 3DEC, which is a three-dimensional distinct element modeling (DEM) software package. In BBM, the rock mass is represented as a collection of polyhedral blocks bonded together at their faces. The behavior of these blocks is governed by the bonding characteristics between them and the external boundary conditions applied to the model.
粘结块模型 (BBM) 是三维离散元3DEC中使用的一种数值岩石力学模拟方法，在 BBM 中，岩体表示为在其表面粘合在一起的多面体块的集 合。这些块体的行为由它们之间的粘结特性和施加于模型的外部边界条件决定。

In BBM, each block is able to deform in a non-linear manner and the interactions between the blocks are represented by bond elements. These bond elements simulate the strength and stiffness of the material between the blocks and allow for discontinuities and fractures to develop between the blocks. This allows for the representation of complex fracture patterns and other geotechnical behavior.在 BBM 中，每个块体都能够以非线性方式变形，并且块体之间的相互作用由键单元表示。这些粘结单元模拟块体之间材料的强度和刚度，并允许块体之间出现不连续性和断裂。这允许表示复杂的断裂模式和其他岩土工程行为。

BBM can be used to model a wide range of rock mechanics problems, such as slope stability, underground excavations, and rock blasting. The method is particularly useful in situations where the rock mass is heavily jointed or fractured and the behavior of the individual blocks is important for accurate modelling.BBM 可用于模拟范围广泛的岩石力学问题，例如边坡稳定性、地下开挖和岩石爆破。该方法在岩体严重节理或断裂且单个块体的行为对于精确模拟很重要的情况下特别有用。

Overall, BBM in 3DEC provides a powerful numerical tool for analyzing and predicting the behavior of rock masses in various geotechnical applications.总的来说，3DEC 中的 BBM 提供了一个强大的数值工具，用于分析和预测各种岩土工程应用中岩体的行为。[1] (2019) Evaluation of ground support design at Eleonore Mine via Bonded Block Modelling【隧道开挖BBM模拟几何模型建立的回顾】 

试验2问题:"Explain Bonded Particle Model (BPM) in PFC3D."

The Bonded Particle Model (BPM) is a modeling technique used in the PFC3D software for simulating the behavior of granular materials [10][5], such as soil, rock, and concrete. The BPM is a type of Distinct Element Method (DEM) in which a collection of discrete particles are bonded together to form a sample. The model includes a set of equations that describe the behavior of individual particles and the forces acting between them. The particles can represent individual grains, aggregates, or clumps of grains.
粘合颗粒模型 (BPM) 是 PFC3D 软件中使用的一种模拟技术，用于模拟颗粒材料的行为，例如土、岩石和混凝土。BPM 是离散元的一种类型，其中一组离散颗粒粘合在一起形成试样。该模型包括一组描述单个颗粒行为和作用于它们之间的力的方程式。颗粒可以代表单个颗粒、聚集体或颗粒团。

In the PFC3D software, the BPM is used to model intact rock [3], and the mechanical behavior of the rock mass depends on the mechanical properties of the constituent particles and the bonds between them. The mechanical properties of particles, such as density, modulus of elasticity, and shear strength, can be defined by the user. The behavior of the bonds is also defined by the user through the use of constitutive models.
在 PFC3D 软件中，BPM 用于模拟完整的岩石，岩体的力学行为取决于组成颗粒的力学性质和它们之间的键合。用户可以定义颗粒的力学性能，例如密度、弹性模量和剪切强度。键的行为也可以由用户通过使用本构模型来定义。

The BPM is a powerful tool for simulating the behavior of rock masses under different loading conditions, including compression, shear, and tension. The model can also be used to study the effects of jointing, faulting, and other discontinuities on the mechanical behavior of rock masses.
BPM 是模拟岩体在不同加载条件下（包括压缩、剪切和拉伸）行为的强大工具。该模型还可用于研究节理、断层和其他不连续性对岩体力学行为的影响。