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1. 发明授权

US07684972B2 Termination assessment of a computer simulation 失效
标题翻译：计算机模拟的终止评估
公开(公告)号：US07684972B2
公开(公告)日：2010-03-23
申请号：US11336859
申请日：2006-01-23
申请人： Steven T. Tillman , Andrew J. Witzig
发明人： Steven T. Tillman , Andrew J. Witzig
IPC分类号： G06F9/45 , G06G7/48
CPC分类号： G06F17/5009
摘要： A method is provided for assessing whether to terminate a computer-implemented simulation of a physical experiment. Computations associated with the computer-implemented simulation that model the physical experiment are executed and to determine if a desired outcome associated with the physical experiment will occur. The results of the computations are evaluated to determine if the results indicate that the desired outcome has occurred. If the desired outcome has not occurred, periodically the results of the computations are evaluated with respect to at least one negative indication that the desired outcome is not possible and thus not likely going to occur. If the at least one negative indication is present, the computations associated with the computer-implemented simulation is terminated.
摘要翻译：提供了一种评估是否终止计算机实现的物理实验仿真的方法。执行与计算机实现的模拟物理实验模拟相关联的计算，并确定是否将发生与物理实验相关联的期望结果。评估计算结果以确定结果是否显示出期望的结果。如果没有发生期望的结果，则周期性地计算结果关于至少一个负面的指示，即期望的结果是不可能的，因此不可能发生。如果存在至少一个负指示，则终止与计算机实现的模拟相关联的计算。

2. 发明申请

US20090254316A1 SECTOR MESHING AND NEIGHBOR SEARCHING FOR OBJECT INTERACTION SIMULATION 有权
标题翻译：部门协调和相邻搜索用于对象交互模拟
公开(公告)号：US20090254316A1
公开(公告)日：2009-10-08
申请号：US11336885
申请日：2006-01-23
申请人： Steven T. Tillman , Andrew J. Witzig
发明人： Steven T. Tillman , Andrew J. Witzig
IPC分类号： G06F7/60
CPC分类号： G06F17/5009 , G06F2217/16
摘要： Methods for computer-implemented simulation for the interaction of two or more objects are provided. Data describing particles that represent each of the objects is generated from geometric data for objects. The data for each particle describes a mass density, velocity and energy at a position of the corresponding object. The particles are grouped into sectors to define a computational mesh comprising a plurality of sectors, wherein each sector is a volume region at a position in space in which particles associated with the objects may reside. For each of a plurality of select particles, so called neighboring particles are determined that are within a region of influence with respect to a select particle. Computations are performed based on laws of conservation of mass, energy and momentum to produce updated values for mass, velocity, energy, pressure, stress and position for the particles at each of a plurality of time steps. According to one aspect, when determining neighboring particles for a given select particle, a search is made through a limited or bounded volume region with respect to the select particle that consists of the region of influence for the select particle at the previous time step and within those sectors in contact with or bordering the region of influence at the previous time step. According to another aspect, the plurality of select particles are identified as those particles that reside in an active sector, wherein an active sector is a sector that contains, or is adjacent to a sector that contains, particles that is actively involved in the engagement between the two objects. For example, an active sector is a sector that contains, or is adjacent to a sector that contains, at least one particle that has a velocity, pressure or stress greater than a corresponding predetermined amount.
摘要翻译：提供了用于两个或多个对象的交互的用于计算机实现的模拟的方法。描述表示每个对象的粒子的数据是从对象的几何数据生成的。每个粒子的数据描述了相应物体位置的质量密度，速度和能量。颗粒被分组成扇区以定义包括多个扇区的计算网格，其中每个扇区是空间中与对象相关联的粒子可以驻留的空间中的体积区域。对于多个选择粒子中的每一个，确定在相对于选择粒子的影响区域内的所谓的相邻粒子。基于质量，能量和动量守恒定律执行计算，以产生在多个时间步长中的每个粒子处的质量，速度，能量，压力，应力和位置的更新值。根据一个方面，当确定给定选择粒子的相邻粒子时，通过相对于选择粒子的有限的或有界的体积区域进行搜索，所述选择粒子由在前一时间步长下的选择粒子的影响区域和那些在上一个时间段接触或接触影响区域的部门。根据另一方面，多个选择粒子被识别为驻留在活动扇区中的那些粒子，其中活动扇区是包含或邻近扇区的扇区，所述扇区包含主动参与在两个对象。例如，活动扇区是包含或邻近扇区的扇区，扇区包含至少一个具有大于相应预定量的速度，压力或应力的粒子。

3. 发明授权

US07620532B2 Object discretization to particles for computer simulation and analysis 有权
标题翻译：用于计算机仿真和分析的对象离散化到粒子
公开(公告)号：US07620532B2
公开(公告)日：2009-11-17
申请号：US11336860
申请日：2006-01-23
申请人： Steven T. Tillman , Andrew J. Witzig
发明人： Steven T. Tillman , Andrew J. Witzig
IPC分类号： G06F17/50 , G06C9/00
CPC分类号： G06F17/5009 , G06F2217/16 , G06T17/005 , G06T2210/56
摘要： A computer-implemented method is provided for generating data representing an object involved in a computer-implemented simulation of a physical experiment. Data describing geometric dimensions and material for the object is received as input. The data may be broken down into data representing distinct components of the object. Data is generated that describes a base parent volume region that extends at least beyond extents of the geometric dimensions of a portion of the object. Next, data is generated that describes child volume regions produced by subdividing the base parent volume region into the child volume regions each having dimensions that are a fraction of the dimensions of the base parent volume region. The data describing each child volume region is examined to determine whether vertices of each of the child volume regions are in the interior or exterior of the portion. The subdivision and examining process is repeated for each child volume region that is not entirely in the interior or entirely in the exterior of the portion to further subdivide each such child volume region to produce data describing a set of child volume regions that do not satisfy the criteria for further subdivision. Data is generated that uniformly distributes particles at positions of the portion of the object based on dimensions of the child volume region in the set, wherein the data for each particle describes a mass density, velocity, pressure, stress and energy at a position and a collection of the particles represent the object portion for use in the computer-implemented simulation.
摘要翻译：提供了一种计算机实现的方法，用于产生表示物理实验的计算机实现的模拟中涉及的对象的数据。作为输入接收描述对象的几何尺寸和材料的数据。数据可以被分解成表示对象的不同组件的数据。生成描述基本父体积区域的数据，该区域至少延伸到对象的一部分的几何尺寸的范围之外。接下来，生成描述通过将基本父体积区域细分为子体区域而产生的子体积区域的数据，每个子体区域的维度是基本父体区域的维度的一部分。检查描述每个子体积区域的数据，以确定每个子体积区域的顶点是否在该部分的内部或外部。对于不完全在内部或完全在该部分的外部的每个子体积区域重复细分和检查过程，以进一步细分每个这样的子体积区域，以产生描述一组不满足进一步细分的标准。产生数据，其基于所述组中的子体积区域的尺寸，在所述对象的所述部分的位置处均匀地分布粒子，其中每个粒子的数据描述了在一个位置处的质量密度，速度，压力，应力和能量颗粒的收集表示在计算机实现的模拟中使用的对象部分。

4. 发明授权

US07610184B1 Sector meshing and neighbor searching for object interaction simulation 有权
标题翻译：扇区网格和邻居搜索对象交互模拟
公开(公告)号：US07610184B1
公开(公告)日：2009-10-27
申请号：US11336885
申请日：2006-01-23
申请人： Steven T. Tillman , Andrew J. Witzig
发明人： Steven T. Tillman , Andrew J. Witzig
IPC分类号： G06F17/50 , G06F17/10
CPC分类号： G06F17/5009 , G06F2217/16
摘要： Methods for computer-implemented simulation for the interaction of two or more objects are provided. Data describing particles that represent each of the objects is generated from geometric data for objects. The data for each particle describes a mass density, velocity and energy at a position of the corresponding object. The particles are grouped into sectors to define a computational mesh comprising a plurality of sectors, wherein each sector is a volume region at a position in space in which particles associated with the objects may reside. For each of a plurality of select particles, so called neighboring particles are determined that are within a region of influence with respect to a select particle. Computations are performed based on laws of conservation of mass, energy and momentum to produce updated values for mass, velocity, energy, pressure, stress and position for the particles at each of a plurality of time steps. According to one aspect, when determining neighboring particles for a given select particle, a search is made through a limited or bounded volume region with respect to the select particle that consists of the region of influence for the select particle at the previous time step and within those sectors in contact with or bordering the region of influence at the previous time step. According to another aspect, the plurality of select particles are identified as those particles that reside in an active sector, wherein an active sector is a sector that contains, or is adjacent to a sector that contains, particles that is actively involved in the engagement between the two objects. For example, an active sector is a sector that contains, or is adjacent to a sector that contains, at least one particle that has a velocity, pressure or stress greater than a corresponding predetermined amount.
摘要翻译：提供了用于两个或多个对象的交互的用于计算机实现的模拟的方法。描述表示每个对象的粒子的数据是从对象的几何数据生成的。每个粒子的数据描述了相应物体位置的质量密度，速度和能量。颗粒被分组成扇区以定义包括多个扇区的计算网格，其中每个扇区是空间中与对象相关联的粒子可以驻留的空间中的体积区域。对于多个选择粒子中的每一个，确定在相对于选择粒子的影响区域内的所谓的相邻粒子。基于质量，能量和动量守恒定律执行计算，以产生在多个时间步长中的每个粒子处的质量，速度，能量，压力，应力和位置的更新值。根据一个方面，当确定给定选择粒子的相邻粒子时，通过相对于选择粒子的有限的或有界的体积区域进行搜索，所述选择粒子由在前一时间步长下的选择粒子的影响区域和那些在上一个时间段接触或接触影响区域的部门。根据另一方面，多个选择粒子被识别为驻留在活动扇区中的那些粒子，其中活动扇区是包含或邻近扇区的扇区，所述扇区包含主动参与在两个对象。例如，活动扇区是包含或邻近扇区的扇区，扇区包含至少一个具有大于相应预定量的速度，压力或应力的粒子。

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