SIEMENS NX Nastran 12 Release Guide Contents Proprietary & Restricted Rights Notice . 9 NX Nastran 12 summary of changes . 1-1 NX Nastran 12 summary of changes to default settings and inputs . 1-1 Dynamics . 2-1 Support for Simcenter Motion . 2-1 Random analysis control enhancement . 2-27 Random analysis output enhancement . 2-30 RESVALT parameter removed . 2-30 Direct-input, frequency-dependent components . 2-30 Output transformation matrices for frequency response analysis . 2-44 Acoustics . 3-1 Finite Element Method Adaptive Order (FEMAO) . 3-1 Acoustics case control command . 3-10 Monopole, dipole, and plane wave acoustic sources . 3-12 Enforced acoustic pressure with complex data input . 3-22 Boundary conditions . 3-25 Acoustic materials with complex properties . 3-35 Acoustic pressure results . 3-37 Support for random acoustic analysis . 3-46 Incident and transmitted acoustic power and acoustic power transmission loss results output . 3-47 Usability improvement for panel and grid contributions . 3-59 Acoustic transfer vectors . 3-65 Output format for acoustic intensity and acoustic velocity results . 3-69 Superelements . 4-1 Frequency-dependent external superelements for frequency response analysis . 4-1 PVT0 data block in superelement OP2 files . 4-12 Multi-step nonlinear solution 401 . 5-1 Shell element support . 5-1 Bar and beam element support . 5-4 Spring and bushing element support . 5-5 Nonlinear buckling . 5-7 Bolt preload improvements for SOL 401 . 5-23 Balanced initial stress-strain . 5-30 Contact improvements . 5-42 Stress output coordinate system . 5-43 Progressive failure analysis . 5-44 NX Nastran 12 Release Guide 3 CoContentsntents User defined material improvements . 5-58 Multi-step nonlinear kinematics solution 402 . 6-1 Multi-step nonlinear kinematics SOL 402 . 6-1 Fourier harmonic solution in SOL 402 . 6-14 Cyclic symmetric in SOL 402 . 6-16 SOL 402 vs SOL 401 comparison . 6-17 SOL 402 .f06 results file . 6-18 Linearized buckling solution in SOL 402 . 6-20 Performance . 7-1 Performance improvements . 7-1 Bolt preload . 8-1 Bolt preload improvements for linear solutions . 8-1 Memory allocation for external applications . 9-1 Memory allocation for external applications . 9-1 Topology Optimization . 10-1 Topology Optimization . 10-1 Monitor points . 11-1 Monitor points for element results and grid point forces . 11-1 Monitor points example . 11-32 Miscellaneous . 12-1 HDF5 format output files . 12-1 Visualization elements . 12-2 Separate mechanical and thermal strain . 12-11 Modal stress calculation when TEMPERATURE(LOAD) is specified . 12-12 P-elements in SOL 200 . 12-12 Documentation changes . 13-1 Removing documentation for legacy acoustic absorber and barrier elements . 13-1 Removing documentation for the legacy VECTOR case control command . 13-1 Upward compatibility . 14-1 Updated data blocks . 14-1 CASECC . 14-1 CONTACT . 14-5 DIT . 14-7 DSCMCOL . 14-8 DYNAMIC . 14-8 EDOM . 14-15 EDT . 14-21 4 NX Nastran 12 Release Guide CContentsontents ELRSCALV . 14-22 EPT . 14-23 EPT705 . ..