公开(公告)号：US09798841B2

公开(公告)日：2017-10-24

申请号：US14854309

申请日：2015-09-15

Applicant: Livermore Software Technology Corporation

Inventor： Hao Chen

IPC: G06F17/50

CPC classification number: G06F17/5018 ,  G06F2217/16

Abstract: Characteristics of a blast source and a FEA model representing a surrounding fluid domain are defined. One layer of new border nodes and elements are created outside of the fluid domain's original outer boundary formed by the original border elements. Each new border element/node is associated with one of the original border elements/nodes as corresponding master element/node. At each time step of a time-marching simulation of an underwater explosion, simulated fluid behaviors are computed for all but the new border elements. The computed fluid behaviors of each original border element are saved into a corresponding lookup table configured to store the computed fluid behaviors for a predefined number of time steps in a first-in-first-out manner. Simulated fluid behaviors of each new border element are determined by interpolating, with the calculated blast wave propagation time from the master element, the stored fluid behaviors in the corresponding master element's lookup table.

公开(公告)号：US20170185699A1

公开(公告)日：2017-06-29

申请号：US15455944

申请日：2017-03-10

Applicant: Livermore Software Technology Corporation

Inventor： Hao Chen

IPC: G06F17/50 ,  G06F17/11

CPC classification number: G06F17/5004 ,  G06F17/11 ,  G06F17/5018 ,  G06F2217/16

Abstract: FEA model representing a reinforced concrete structure is defined and received in a computer system. The FEA model contains solid elements defined solid element nodes and beam elements defined by master beam element nodes. Beam elements representing reinforcing steel are embedded inside solid elements representing concrete. Each beam element straddles one or more solid elements. Slave beam nodes along the at least one beam element are created such that each of the solid elements houses at least one slave beam node. Numerically simulated structural behaviors of the reinforced concrete structure are obtained by conducting a time-marching simulation using the FEA model. At each solution cycle of the time-marching simulation, proper coupling of the solid elements and the at least one beam element are ensured. Exchanges of masses and momentums between a slave beam node and corresponding solid element nodes is conducted with both consistent and non-consistent portions.

公开(公告)号：US20190012416A1

公开(公告)日：2019-01-10

申请号：US16132726

申请日：2018-09-17

Applicant: Livermore Software Technology Corporation

Inventor： Hao Chen

IPC: G06F17/50

CPC classification number: G06F17/5018 ,  G06F17/5004 ,  G06F2217/16

Abstract: Characteristics of a reinforced concrete structure are received. FEA model is created in a computer system accordingly. FEA model contains solid elements defined solid nodes and beam elements defined by master beam nodes. Beam elements representing reinforcing steel bars are embedded inside solid elements representing concrete. Each beam element straddles one or more solid elements. Slave beam nodes along the at least one beam element are created such that each of the solid elements houses at least one slave beam node. Numerically-simulated structural behaviors of the reinforced concrete structure are obtained at each solution cycle of the time-marching simulation. Proper coupling of solid elements and at least one beam element are ensured. Exchanges of masses and momentums between a slave beam node and corresponding solid element nodes is conducted with both consistent and non-consistent portions. Reinforced concrete structure is adjusted to alleviate weakness indicated in the numerically-simulated structural behaviors.

公开(公告)号：US20160314227A1

公开(公告)日：2016-10-27

申请号：US14693000

申请日：2015-04-22

Applicant: Livermore Software Technology Corporation

Inventor： Hao Chen

IPC: G06F17/50

CPC classification number: G06F17/5018

Abstract: FEA model representing a reinforced concrete structure is defined and received in a computer system. The FEA model contains a number of solid elements defined by a number of solid element nodes and a number of beam elements defined by a number of master beam element nodes. Beam elements representing reinforcing steel are embedded inside solid elements representing concrete. Each beam element straddles one or more solid elements. Slave beam nodes along the at least one beam element are created such that each of the solid elements houses at least one slave beam node. Numerically simulated structural behaviors of the reinforced concrete structure are obtained by conducting a time-marching simulation using the FEA model. At each of the many solution cycles of the time-marching simulation, proper coupling of the solid elements and the at least one beam element are ensured.

Abstract translation: 代表钢筋混凝土结构的FEA模型在计算机系统中被定义和接收。 FEA模型包含由许多实体元素节点定义的多个实体元素以及由多个主波束元素节点定义的多个波束元素。 代表钢筋的梁元素嵌入表示混凝土的固体元素内。 每个梁元件跨越一个或多个固体元件。 创建沿着至少一个梁元件的从属光束节点，使得每个固体元件容纳至少一个从光束节点。 通过使用FEA模型进行时间行进模拟，获得钢筋混凝土结构的数值模拟结构行为。 在时间推进模拟的许多解循环中的每一个处，确保了固体元件和至少一个梁元件的适当耦合。

公开(公告)号：US10699042B2

公开(公告)日：2020-06-30

申请号：US15898426

申请日：2018-02-17

Applicant: Livermore Software Technology Corporation

Inventor： Xinhai Zhu ,  Houfu Fan ,  Li Zhang ,  Hao Chen ,  Jinglin Zheng

IPC: G06G7/48 ,  G06F30/23 ,  G06F30/17 ,  G06F111/10 ,  G06F113/26 ,  G06F119/18

Abstract: First FEA mesh model representing 3-D geometry of a carbon fiber reinforced composite (CFRC) product/part, pre-forming fiber orientation and desired reference fiber direction at a particular location on the product/part are received. First FEA mesh model contains finite elements associated with respective material properties for carbon fibers and binding matrix. Pre-forming fiber orientation includes number of fibers and relative angles amongst the fibers. Pre-forming 2-D shape of a workpiece used for manufacturing the product/part is obtained by conducting a one-step inverse numerical simulation that numerically expands the first to a second FEA mesh model based on numerically-calculated structural behaviors according to respective material properties. Pre-forming fiber orientation is superimposed on the second FEA mesh model with the desired reference fiber direction being preserved. Relative angles amongst all of the fibers on the product/part are determined by correlating the superimposed fiber orientation of the second to the first FEA mesh model.

公开(公告)号：US20170076026A1

公开(公告)日：2017-03-16

申请号：US14854309

申请日：2015-09-15

Applicant: Livermore Software Technology Corporation

Inventor： Hao Chen

IPC: G06F17/50

CPC classification number: G06F17/5018 ,  G06F2217/16

Abstract: Characteristics of a blast source and a FEA model representing a surrounding fluid domain are defined. One layer of new border nodes and elements are created outside of the fluid domain's original outer boundary formed by the original border elements. Each new border element/node is associated with one of the original border elements/nodes as corresponding master element/node. At each time step of a time-marching simulation of an underwater explosion, simulated fluid behaviors are computed for all but the new border elements. The computed fluid behaviors of each original border element are saved into a corresponding lookup table configured to store the computed fluid behaviors for a predefined number of time steps in a first-in-first-out manner. Simulated fluid behaviors of each new border element are determined by interpolating, with the calculated blast wave propagation time from the master element, the stored fluid behaviors in the corresponding master element's lookup table.

Abstract translation: 定义爆炸源和代表周围流体域的FEA模型的特征。 在由原始边界元素形成的流体域的原始外边界之外创建一层新的边界节点和元素。 每个新的边界元素/节点与原始边界元素/节点之一相关联，作为对应的主元素/节点。 在水下爆炸的时间模拟的每个时间步骤，除了新的边界元素之外，还计算所有模拟流体行为。 每个原始边界元素的计算流体行为被保存到相应的查找表中，该查找表被配置为以先进先出的方式将计算出的流体行为存储在预定数量的时间步长。 每个新的边界元素的模拟流体行为通过内插从主元素计算的爆炸波传播时间来确定相应主元件查找表中存储的流体行为。

公开(公告)号：US10474773B2

公开(公告)日：2019-11-12

申请号：US16132726

申请日：2018-09-17

Applicant: Livermore Software Technology Corporation

Inventor： Hao Chen

IPC: G06F17/50

Abstract: Characteristics of a reinforced concrete structure are received. FEA model is created in a computer system accordingly. FEA model contains solid elements defined solid nodes and beam elements defined by master beam nodes. Beam elements representing reinforcing steel bars are embedded inside solid elements representing concrete. Each beam element straddles one or more solid elements. Slave beam nodes along the at least one beam element are created such that each of the solid elements houses at least one slave beam node. Numerically-simulated structural behaviors of the reinforced concrete structure are obtained at each solution cycle of the time-marching simulation. Proper coupling of solid elements and at least one beam element are ensured. Exchanges of masses and momentums between a slave beam node and corresponding solid element nodes is conducted with both consistent and non-consistent portions. Reinforced concrete structure is adjusted to alleviate weakness indicated in the numerically-simulated structural behaviors.

公开(公告)号：US20190258762A1

公开(公告)日：2019-08-22

申请号：US15898426

申请日：2018-02-17

Applicant: Livermore Software Technology Corporation

Inventor： Xinhai Zhu ,  Houfu Fan ,  Li Zhang ,  Hao Chen ,  Jinglin Zheng

IPC: G06F17/50

Abstract: First FEA mesh model representing 3-D geometry of a carbon fiber reinforced composite (CFRC) product/part, pre-forming fiber orientation and desired reference fiber direction at a particular location on the product/part are received. First FEA mesh model contains finite elements associated with respective material properties for carbon fibers and binding matrix. Pre-forming fiber orientation includes number of fibers and relative angles amongst the fibers. Pre-forming 2-D shape of a workpiece used for manufacturing the product/part is obtained by conducting a one-step inverse numerical simulation that numerically expands the first to a second FEA mesh model based on numerically-calculated structural behaviors according to respective material properties. Pre-forming fiber orientation is superimposed on the second FEA mesh model with the desired reference fiber direction being preserved. Relative angles amongst all of the fibers on the product/part are determined by correlating the superimposed fiber orientation of the second to the first FEA mesh model.