FORMAT II : Second version of Fortran matrix abstraction technique :

A detailed description of the analytical approach, development, and use of a computer program which generates the matrices necessary for the analysis of general aircraft structures for deflections and stresses by the displacement method is presented. The Displacement Method Matrix Generator program is designed for use in conjunction with the FORMAT II system as a user-coded subroutine and, as such, will accommodate matrices of the order 2000 X 2000. Up to six degrees of freedom may be considered at each joint in the structure which is idealized as an assemblage of bar elements capable of resisting axial, bending and torsional forces and triangular and rectangular panel elements capable of resisting membrane forces. Applied loading may be any combination of mechanical loads at the joints, thermal loads resulting from bar element elongation due to temperature change, and initial joint displacements. The report includes details associated with the treatment of oblique reactions, and a complete description of the computer program input considerations, operation, and coding."This report was prepared by the Douglas Aircraft Company, Inc., Long Beach, California, under USAF Contract No. AF 33(615)-2483, Project No. 1467, Task No. 146705.""Douglas Aircraft Company, Inc., Aircraft Division.""March 1967."Includes bibliographical references (page 239).A detailed description of the analytical approach, development, and use of a computer program which generates the matrices necessary for the analysis of general aircraft structures for deflections and stresses by the displacement method is presented. The Displacement Method Matrix Generator program is designed for use in conjunction with the FORMAT II system as a user-coded subroutine and, as such, will accommodate matrices of the order 2000 X 2000. Up to six degrees of freedom may be considered at each joint in the structure which is idealized as an assemblage of bar elements capable of resisting axial, bending and torsional forces and triangular and rectangular panel elements capable of resisting membrane forces. Applied loading may be any combination of mechanical loads at the joints, thermal loads resulting from bar element elongation due to temperature change, and initial joint displacements. The report includes details associated with the treatment of oblique reactions, and a complete description of the computer program input considerations, operation, and coding.Mode of access: Internet.will digitiz

FORMAT : Fortran matrix abstraction technique.

FORMAT (Fortran Matrix Abstraction Technique) is a digital computer program system consisting of three distinct programs written entirely in Fortran IV. The system provides for generation, manipulating, printing, and plotting of large order (i.e., 2000) matrices commonly used in state-of-the-art structural analyses. Phase I of the system automatically generates matrices required in the thermomechanical analysis of structures by the Force or Displacement Methods including those necessary in joining, symmetric/antisymmetric r reaction disconnect, vibration, and stability analyses. Modules for converting continuous-to-discrete loads, and analytic-to-discrete geometry and for maintenance of a master case data file are also provided to minimize input data requirements. Phase II provides an abstraction capability to effect basic matrix algebra via the standard matrix operations (e.g., add, multiply, etc.), and several control operations (e.g., save and print matrices, etc.). The sequence of operations is user designated. Phase III provides for self-explanatory report form printing of matrix data resulting from Force or Displacement Method analyses, and a nominal graphical display capability for matrix and geometry data."Research supported by the Air Force Flight Dynamics Laboratory, Research and Technology Division, Air Force Systems Command, United States Air Force, and performed by the Douglas Aircraft Company, Aircraft Division."AD0683261 (from http://www.dtic.mil)."December 1968."Includes bibliographical references (pages 687-688).FORMAT (Fortran Matrix Abstraction Technique) is a digital computer program system consisting of three distinct programs written entirely in Fortran IV. The system provides for generation, manipulating, printing, and plotting of large order (i.e., 2000) matrices commonly used in state-of-the-art structural analyses. Phase I of the system automatically generates matrices required in the thermomechanical analysis of structures by the Force or Displacement Methods including those necessary in joining, symmetric/antisymmetric r reaction disconnect, vibration, and stability analyses. Modules for converting continuous-to-discrete loads, and analytic-to-discrete geometry and for maintenance of a master case data file are also provided to minimize input data requirements. Phase II provides an abstraction capability to effect basic matrix algebra via the standard matrix operations (e.g., add, multiply, etc.), and several control operations (e.g., save and print matrices, etc.). The sequence of operations is user designated. Phase III provides for self-explanatory report form printing of matrix data resulting from Force or Displacement Method analyses, and a nominal graphical display capability for matrix and geometry data.Air Force Contract No.Mode of access: Internet

FORMAT : Fortran matrix abstraction technique.

"December 1968."Includes bibliographicsl references (page 65).Air Force Contract No.Mode of access: Internet

FORMAT : Fortran matrix abstraction technique.

The FORMAT System has been augmented with highly efficient and reliable procedures for structural analysis via an alternate solution approach which combines the rigorous generation features of the existing force method with a few new equation solving process characteristic of the current displacement methods. As a result, a tenfold increase in potential problem size to in excess of 10000 elastic degrees of freedom is the minimum currently anticipated as attainable on present major digital computers, and the linear behavioral characteristics can take immediate advantage of any advance in hardware capabilities. In making these provisions considerable emphasis was placed on the control of both physical and numerical error throughout the total solution process. To actual aerospace structures with up to 6500 degrees of freedom have been successfully processed as single entities on a production basis, that is, within the confines of a production schedule with maximum reliability at minimum cost.Research supported by the Air Force Flight Dynamics Laboratory, Air Force Systems Command, United States Air Force, and performed by the Douglas Aircraft Company."April 1973."Includes bibliographical references (pages 103-104).The FORMAT System has been augmented with highly efficient and reliable procedures for structural analysis via an alternate solution approach which combines the rigorous generation features of the existing force method with a few new equation solving process characteristic of the current displacement methods. As a result, a tenfold increase in potential problem size to in excess of 10000 elastic degrees of freedom is the minimum currently anticipated as attainable on present major digital computers, and the linear behavioral characteristics can take immediate advantage of any advance in hardware capabilities. In making these provisions considerable emphasis was placed on the control of both physical and numerical error throughout the total solution process. To actual aerospace structures with up to 6500 degrees of freedom have been successfully processed as single entities on a production basis, that is, within the confines of a production schedule with maximum reliability at minimum cost.Air Force Contract No.Mode of access: Internet

FORMAT : Fortran matrix abstraction technique.

The FORMAT System has been updated by the incorporation of additional basic capability and the refinement of existing capability. A simpler mode of updating case data and extended force method matrix generation capability has been incorporated in Phase I of the system. A refined 'Structure Cutter' module, capabilities for matrix partitioning and instruction looping, and an additional eigenvalue/eigenvector extraction module have been incorporated in Phase II. Finally the limitations which existed in the matrix plotting capability in Phase III have been eliminated. Programming documentation for the extended capability of Phase III of the FORMAT System is presented in this report.Research supported by the Air Force Flight Dynamics Laboratory, Air Force Systems Command, United States Air Force, and performed by the Douglas Aircraft Company.AD0713840 (from http://www.dtic.mil)."August 1970."Includes bibliographical references (pages 37-38).The FORMAT System has been updated by the incorporation of additional basic capability and the refinement of existing capability. A simpler mode of updating case data and extended force method matrix generation capability has been incorporated in Phase I of the system. A refined 'Structure Cutter' module, capabilities for matrix partitioning and instruction looping, and an additional eigenvalue/eigenvector extraction module have been incorporated in Phase II. Finally the limitations which existed in the matrix plotting capability in Phase III have been eliminated. Programming documentation for the extended capability of Phase III of the FORMAT System is presented in this report.Air Force Contract No.Mode of access: Internet

FORMAT : Fortran matrix abstraction technique.

The FORMAT System has been augmented with highly efficient and reliable procedures for structural analysis via an alternate solution approach which combines the rigorous generation features of the existing force method with a few new equation solving process characteristic of the current displacement methods. As a result, a tenfold increase in potential problem size to in excess of 10000 elastic degrees of freedom is the minimum currently anticipated as attainable on present major digital computers, and the linear behavioral characteristics can take immediate advantage of any advance in hardware capabilities. In making these provisions considerable emphasis was placed on the control of both physical and numerical error throughout the total solution process. To actual aerospace structures with up to 6500 degrees of freedom have been successfully processed as single entities on a production basis, that is, within the confines of a production schedule with maximum reliability at minimum cost.Research supported by the Air Force Flight Dynamics Laboratory, Air Force Systems Command, United States Air Force, and performed by the Douglas Aircraft Company."April 1973."Includes bibliographical references (pages 131-132).The FORMAT System has been augmented with highly efficient and reliable procedures for structural analysis via an alternate solution approach which combines the rigorous generation features of the existing force method with a few new equation solving process characteristic of the current displacement methods. As a result, a tenfold increase in potential problem size to in excess of 10000 elastic degrees of freedom is the minimum currently anticipated as attainable on present major digital computers, and the linear behavioral characteristics can take immediate advantage of any advance in hardware capabilities. In making these provisions considerable emphasis was placed on the control of both physical and numerical error throughout the total solution process. To actual aerospace structures with up to 6500 degrees of freedom have been successfully processed as single entities on a production basis, that is, within the confines of a production schedule with maximum reliability at minimum cost.Air Force Contract No.Mode of access: Internet

FORMAT : Fortran matrix abstraction technique.

FORMAT (FORtran Matrix Abstraction Technique) is a digital computer system consisting of three distint programs written entirely in Fortran IV. The system provides for generating, manipulating, printing, and plotting of large order (i.e., 2000) matrices commonly used in state-of-the-art structural analysis techniques. The capability of maintaining and automatic editing of case data has also been provided. Phase 1 of the system automatically generates matrices for joining, symmetric/antisymmetric disconnect, vibration, and stability analyses. Modules for converting continuous-to-discrete loads, analytic-to-discrete geometry, and a master case data file editor are provided to reduce input data requirements. Phase 2 of the system provides for the manipulation of matrices. The matrix operations (e.g., add, multiply, etc.), several special matrix operations, (e.g., adjoin), and severl control operations (e.g., save matrices, conditional IF test, etc.). Phases 3 of the system provides for self-explanatory report form printing of matrices and a nominal graphical display capability, including a geometric display.Research supported by the Air Force Flight Dynamics Laboratory, Air Force Systems Command, United States Air Force, and performed by the McDonnell Douglas Corporation, Douglas Aircraft Division.AD0683782 (from http://www.dtic.mil)."December 1968."Includes bibliographical references (page 169).FORMAT (FORtran Matrix Abstraction Technique) is a digital computer system consisting of three distint programs written entirely in Fortran IV. The system provides for generating, manipulating, printing, and plotting of large order (i.e., 2000) matrices commonly used in state-of-the-art structural analysis techniques. The capability of maintaining and automatic editing of case data has also been provided. Phase 1 of the system automatically generates matrices for joining, symmetric/antisymmetric disconnect, vibration, and stability analyses. Modules for converting continuous-to-discrete loads, analytic-to-discrete geometry, and a master case data file editor are provided to reduce input data requirements. Phase 2 of the system provides for the manipulation of matrices. The matrix operations (e.g., add, multiply, etc.), several special matrix operations, (e.g., adjoin), and severl control operations (e.g., save matrices, conditional IF test, etc.). Phases 3 of the system provides for self-explanatory report form printing of matrices and a nominal graphical display capability, including a geometric display.Air Force Contract No.Mode of access: Internet

FORMAT : Fortran matrix abstraction technique.

FORMAT (FORtran Matrix Abstraction Technique) is a digital computer system consisting of three distint programs written entirely in Fortran IV. The system provides for generating, manipulating, printing, and plotting of large order (i.e., 2000) matrices commonly used in state-of-the-art structural analysis techniques. The capability of maintaining and automatic editing of case data has also been provided. Phase 1 of the system automatically generates matrices for joining, symmetric/antisymmetric disconnect, vibration, and stability analyses. Modules for converting continuous-to-discrete loads, analytic-to-discrete geometry, and a master case data file editor are provided to reduce input data requirements. Phase 2 of the system provides for the manipulation of matrices. The matrix operations (e.g., add, multiply, etc.), several special matrix operations, (e.g., adjoin), and severl control operations (e.g., save matrices, conditional IF test, etc.). Phases 3 of the system provides for self-explanatory report form printing of matrices and a nominal graphical display capability, including a geometric display.Research supported by the Air Force Flight Dynamics Laboratory, Air Force Systems Command, United States Air Force, and performed by the McDonnell Douglas Corporation, Douglas Aircraft Division.AD0683262 (from http://www.dtic.mil)."December 1968."Includes bibliographical references (page 735).FORMAT (FORtran Matrix Abstraction Technique) is a digital computer system consisting of three distint programs written entirely in Fortran IV. The system provides for generating, manipulating, printing, and plotting of large order (i.e., 2000) matrices commonly used in state-of-the-art structural analysis techniques. The capability of maintaining and automatic editing of case data has also been provided. Phase 1 of the system automatically generates matrices for joining, symmetric/antisymmetric disconnect, vibration, and stability analyses. Modules for converting continuous-to-discrete loads, analytic-to-discrete geometry, and a master case data file editor are provided to reduce input data requirements. Phase 2 of the system provides for the manipulation of matrices. The matrix operations (e.g., add, multiply, etc.), several special matrix operations, (e.g., adjoin), and severl control operations (e.g., save matrices, conditional IF test, etc.). Phases 3 of the system provides for self-explanatory report form printing of matrices and a nominal graphical display capability, including a geometric display.Air Force Contract No.Mode of access: Internet