Point Source out of Plane Wave Numerical SimulationProgram and Example Based on New Methods

• 1、School of Architecture Engineering Northeast Dianli University
• 2、School of Architecture Engineering Northeast Dianli University, Jilin 132012

Abstract：This paper outlined explicit calculation method used in the point source out of plane program, and illustrate main function，input and output parameters and call methods of program. The numerical example under three typical point source load and different input parameters are calculated, and give relevant calculation results. Near source stability, accuracy and relevant problems based on calculation results are discussed and analyzed. The research results show that under precondition of inner domain wave numerical stability condition △x≥Cs△t get satisfied ,this paper methods and program have several points are different from traditional feature: the first is that near source stability is incredible; while virtual boundary is extremely close to point source load, it can also give stable numerical simulation result. The second is that damping stability is outstanding; over the range of surpass commonly project damping（0≤c≤0.5）, the stable numerical simulation result is also gave. The third is that the stability of numerical simulation is not influenced by integral step, through change integral step can achieve simulation ultrahigh frequency and ultralow frequency out of plane wave. The fourth is that numerical simulation accuracy of inner domain and virtual boundary wave displacement are all reach 3-order accuracy.

Keywords： computational solid mechanics new methods out of plane wave numerical simulation stability accuracy best-fitting transmitting boundary