Papers by Author: Guang Bing Zhao

Abstract: Created in ADAMS/View virtual environment, it combines the complementary advantages of the ADAMS secondary development programming technology APDL and VC++6.0 to build a rigidity and flexibility coupled parameterized dynamic simulation model of the PUMA560 robot, while through the self defining function of constraints and loads, it realizes the model drive loading . After multiple dynamic simulations, normal solutions and inverse solutions of the PUMA560 robot are obtained, and this can provide a foundation for the research on the operability and space locus of the PUMA560 robot. Meanwhile, this new method is also true for other similar kind of rigidity and flexibility coupled mechanics dynamic simulation and a reliable pathway for the analysis of mechanic random errors effect on its motion as well. The excellent feature of this new method is that it will considerate sufficiently the effects of key part’s elastic deformation on the entire mechanic motion, while it needs not to create complex analogue to solve the mechanic, rapidly, conveniently and with high accuracy, which has good theoretical meaning and application value.

Abstract: In this paper, it proposes an effective method for 6-6 Stewart parallel mechanism dynamics analysis in ADAMS. Firstly, it builds a virtual model in ADAMS/View, using spline function and self-defining function to define loads and constraints, through the follow-up dynamic simulation, the positive solutions and inverse solutions are solved conveniently, and this can provide a foundation for analyzing the parallel mechanism’s operability and space path line. Secondly, it uses secondary developing technology (APDL) to program a parameterized virtual model, which can give a credibility way to analyze the influence of random errors on the mechanism mobile. In short, it needn’t to calculate complex mathematic model as that in the past, yet this new method proposed provides a definite theory foundation and contains well application values for further study.

Abstract: Cast molding is the main manufacture process in foundry, because the most disfigurements occurs in this step, while the foundry itself is a complex non-linear instantaneous transferring heat process, in which it should take the absorbing and releasing potential heat into account. In this paper, it simulates the temperature field changing process of the cast solidification in ANSYS software, gets the temperature field change rule for a typical cast, and analyzed the effect of different foundry technics parameters on composite interface temperature, which will provide numerical bases for optimizing foundry technics parameters in future.

Abstract: Based on profile involutes equation and tooth easement curve equation of standard gear, parameterization three dimensional finite element model of the gear drive system is built up in ANSYS, and numerical computation of the working process is taken in ANSYS/LS-DYNA, then contact stress of and pressure distribution are got. It creates an ultimate state equation of every system parameter (input) converting to output (response), considering different system random error synthetically, sample points locations in input variable sampling space are fixed with the method of matrix experiment design, which was used in series of deterministic fitting test. In the test, least-squares procedure regression analysis of the ultimate state equation is taken to fix the items and coefficients after multiple fitting test. Using this ultimate state equation, system reliability level and reliability sensitivity of different variables can be calculated which provides theoretical bases for dynamic optimum design of gear drive system.