To solve the problem related to concepts generation for mechanical product radical innovation design, the theory for invention problem solving (TRIZ) was applied to the fuzzy front end stage of new product development. The opportunity of product radical innovation was analyzed based on the dissipative structure theory. The mechanical product radical innovation method was put forward based on setting up the main function substance-field model of product technology system. The radical innovation technology opportunity was analyzed through technology forecasting of technical subsystems for realizing the product main function based on technology evolution theory and the radical innovation ideas was produced by using computer aided innovation (CAI) software tools. The innovation design of a speedy cutting off valve based on the mentioned process model was used to validate the effectiveness of the proposed method．

Based on the shortcomings of traditional FMEA in analyzing problems and finding solutions， an innovative design method integrated with fishbone diagram， FMEA and evolution laws was proposed. This method used the hierarchical analysis of fishbone diagram to assist FMEA fully excavate possible failure modes， then analyzed failure modes according to the standard expression of FMEA and determined the Risk Priority Number（RPN）. By adopting evolution laws， the method can solve the failure problems effectively and efficiently. This paper also verifies the feasibility of this integrated method with an example of vibration damping design on rail track．

In order to analyze interference fringes obtained from infrared interferometer spectrometer collection and accurately inverse the corresponding spectrum distribution function， the spectrum algorithm based on Michelson interferometer structurem was designed and the corresponding spectrum software was completed by VC++. Experiments were tested using three nearinfrared wavelengths of 830，940， and 1 064 nm to compared with FTIR500 spectrometer test data and MATLAB simulation data. Experimental results showed that the spectral data in the main wavelength and the amplitude of the probe selection position obtained by the algorithm was similar with FTIR500 spectrometer. But the aspect of noise and clutter rejection was better than that of FTIR500 spectrometer. The data processing speed was slightly lower than MATLAB. However， the signal to noise ratio of the spectral distribution function was higher than the data processing results of MATLAB. These prove that the system has certain advantages．

In order to study the law of mechanical components reliability and sensitivity under the condition of load actting many times and reduce manufacturing costs by modifying component design parameters according to the sensitivity， a reliability model was built by combining the probabilistic perturbation method， the moment method and considering the times of load acting. The reliability sensitivity of mechanical component with arbitrary distribution parameters on the condition of known first four moments of basic random variables was studied， applying the probabilistic perturbation method and the Edgeworth series technique， combining the order statistic theory to study the influence of load action time on the reliability and sensitivity calculation. Calculation results of the reliability by this model were different from the traditional models. Considering the times of load action， the reliability values were different under different times of load action. A bolt was taken as an example to get the reliability variation with the increase in the times of loads. The reliability and reliability sensitivities of the mean and variance of the random variables were studied. The curves of reliabilities and sensitivities were obtained. Law with the role of the times of load action was that the reliability decreased as the times increased with a monotonic trend, the reliability value was minimum when the times of load action was maximum. The curves of reliabilities of variables mean and variance had different trend. Among which the biggest influence factor effect on the reliability with time was the diameter mean and variance of bolt. With the time increase， the bolt crosssection diameter became the dominating factor affect the reliability of the bolt.

In order to improve the quality of sheet metal forming，an equivalent drawbead restraining force model was proposed. Plane strain assumption was employed in the model and many factors were considered like incline of neutral layer and Bauschinger effect. The computation results were compared with classical Nine test data，which verified the effectiveness of the method. Fender was tested by this equivalent drawbead restraining force model and the drawbead structure was optimized by nonlinear algorithm. The drawbead geometric parameters were inversed by the equivalent drawbead restraining force model，then the physical drawbead simulation model was established, and products with better quality were obtained. The research results prove the equivalent drawbead restraining force model can be used in sheet metal forming effectively．

Product diversity and market competition have promoted the demand of personalized products. The traditional product architecture cannot meet requirements of low cost and individualization. 〖JP2〗Open architecture allows products have the advantage of mass customization to meet the personalized requirements of customers. Modules of the open architecture product （OAP） consist of common module， customized module and personalized module. Module partition and module planning are important steps in the open architecture product design. A module planning method was proposed for the OAP design which utilized the axiomatic design as the analysis framework and quality function deployment （QFD） as the basic model. Axiomatic design was adopted to map the relationship between functional requirements and conceptual structures. The design relationship matrix of product was established by analyzing the function， spatial and flow correlations between components. A hierarchical clustering method was used to cluster elements in the design relationship matrix. QFD was used to plan the type of components and the module type planning guideline was established. The module type was decided based on the type of parts. A toy painting machine was designed using the proposed method with the open architecture， which showed the feasibility of the module planning．

To increase the flexibility of the product design， the adaptable design is effectively integrated with the concept of product family. On the basis of analyzing the existing product platforms， the parametric and modular product platforms were unified into a product platform based on design parameter， and a new design method of adaptabilityoriented flexible product platform was presented. The axiomatic design theory was utilized as framework to zigzaging mapping between functional requirements and design parameters and design matrix was established. The sensitivity analysis among design parameters and between design parameters and functional requirements was done. Then the design incidence matrix was established and relation degree among design parameters was analyzed. The diversity of design parameters for variety products was calculated， and the platform parameters and variety parameters were identified. Finally， an example of flexible product configuration for overhead traveling crane was used to demonstrate the feasibility and practical value of the proposed method.

In view of the problem of difficulty in optimizing twist beam suspension kinematics parameters，the shear center of torsion beam was obtained according to the principle of mechanics of materials. Based on the spatial coordinate transformation matrix and analytic geometry of space，the mathematical model of torsion beam suspension was established under roll case. The model was simulated by ADAMS and verified by comparing with test data. Furthermore，by studying the influence of the position of the cross section and the orientation of the cross section on suspension K characteristics，the relationship between these factors and suspension characteristic parameters are derived which has theoretical guidance meaning to design and optimization of torsion beam suspension．

In the development of the axial flow blood pump， the blood was usually taken as a Newtonian fluid. When taking into account of the existence of local artery stenosis and other geometric mutation occurs， an area with very low flow shear rate meight be produced in the arterial partial flow field. So the nonNewtonian characteristics of blood should be considered.  A model of the axial flow blood pump was established， and the impaction of the flow and the rotate speed on the inlet and outlet of the flow field in the blood pump was analyzed through CFD as well as the influence of the guide vane on the flow field. By the drive experiment of the designed blood pump， the output flow and pressure were measured. The results showed that the designed blood pump was consistent on the drive performance of the simulation.

Many users are plagued by the problem that screw blades of shaftless screw conveyor are deformed when transport materials are with high viscosity and large specific gravity. The algorithm of particle swarm optimization (PSO) was used with the purpose of minimum deformation of shaftless screw stiffness. Firstly，optimization design model of shaftless screw blade was constructed based on particle swarm optimization. Then，examples were designed with theoretical model constructed. Finally，experimental research was studied to further confirm that the method designed was advanced and practical. Intelligent algorithm is applied in mechanical optimization design，which provides new method for the research on the field．

Low temperature plasma can effectively clean and activate material surface without the disadvantages in liquid phase treatment such as environmental pollution， high energy consumption and high cost，so it can improve surface treatment quality by designing a appropriate plasma discharge structure. This paper built a mathematical model of CRFHCP hollow cathode plasma discharge. After analyzing key factors influencing the plasma discharge， various hollow cathode plasma discharge scheme with different electrode configuration mode， different sample position and different removed hollow cathode structure were designed. Through the determination of contact angle， surface energy calculation and SEM photos， the hydrophobic PP film morphology was characterized before and after plasma treatment under different plasma discharge scheme. According to the experimental results， there are smaller contact angle and larger surface energy in removed hollow cathode plasma discharge structure with radial nozzle than that by other ways. It is proved that the optimized CRFHCP hollow cathode plasma discharge structure can more effectively improve the hydrophilic of material surface.

Combined with an engineering example and experiment data， theoretical formula of the reinforced concrete (RC) beams shear capacity with highperformance ferrocement laminate (HPFL) after fire was deduced and verified. Considering the impacts on the strength of concrete and steel， the calculation model was put forward on the basis of domestic and international scholars research on the changes of concretes and steels strength after fire. It was assumed that there was no relative slipping between steel and concrete and the tensile strength of concrete was ignored. Combined with the limit equilibrium principle， the softening of concrete compressive strength under the condition of the tensile strain was considered. Regardless of the coupling action of temperaturestress， the equivalent section method was adopted on the basis of trussarch model. The results show that this method of reinforcement significantly improves the shear capacity of the reinforced beam. The calculation results are in good agreement with the experimental ones. The results can be referenced for beams strengthened with highperformance ferrocement．

Aiming at high speed， high precision and low impact automatic assembly technology of segments， a rotary electrohydraulic control system for segment assembly test bed of shield machine is designed. The electrohydraulic control system based on both the stepless regulation of proportional reversing valve and the assistant guaranteeing of balance valve was designed through full analysis on the rotary drive system of segment erector with features of long stroke， large inertia and long operation. By reference to the relevant parameters of engineering segment erector and the design requirements of segment assembly test bed， similarity theory based parameter indexes and schematic diagram of rotary electrohydraulic control system were firstly put forward. Then load analysis was conducted through SolidWorks modeling. Parameters design and components selection of the electrohydraulic control system were completed. And finally a rotary electrohydraulic control system for the segment assembly test bed with a diameter of 2 meter was built and experimentally analyzed. The experimental results show that the steady state performance of the system meets design requirements with max rotate speed of 6.25 r/min， the system has a good dynamic performance with peak time of 1.1 s for step input， and the system can realize steadily slope slow down and steadily low speed parking.

A full face shield tunneling machine simulator test rig was designed for the research on the interaction of the various physical parameters in the process of tunneling in order to determine the adapted working parameters for different geological conditions. The simulated shield machine consisting of a cutter head system， a thrust system and a screw conveyor system was used to simulate the real tunneling process of the shield. The mechanical structure of the simulated shield machine was designed， so were the cutter head hydraulic system， the thrust hydraulic system and the screw conveyor hydraulic system. The design ideas of structure and the working processes of the simulated shield machine were introduced as well as the working principle， function features and units selection of the hydraulic systems. AMESim was used to simulate the speed regulation control features of the cutter head hydraulic system and the thrust hydraulic system. The simulation results indicate the rotating speed of cutter and the speed of simulated shield machine can both be controlled realtimely．

 In order to analyze the influence of the radial clearance to the reliability of the fourrow conical roller bearing， the special calculator program of bearing BEM was compiled based on the method of three dimensional elastic contact boundary element method with frication， in which the plate units were used to simulate the rollers. When equal radial clearance and unequal clearance were applied to the mill fourrow conical roller bearing， the distribution of radial pressure， radial and axial load were simulated with the program. The influence rules of radial clearance to the pressure and load distribution of fourrow conical roller bearing were analyzed. According to the result， the load proportion of the mill fourrow conical roller bearing didnt change when equal radial clearance was adopted. And the number of the standunderload rollers decreased and the load of one roller bearing increased when positive equal radial clearance was adopted. The situation was opposite when negative equal radial clearance was adopted. When unequal radial clearance was adopted， the load proportion of the row with the larger value of radial clearance decreased and the bias factor was decreased．

Based on the theory of gear meshing， the analysis model and method of single tooth meshing are presented. Firstly， according to the formation mechanism of sliding and rolling friction， the sliding and rolling power loss ratio models were constructed and the formula of power loss ratio was derivated by the theory of mechanics and geometry. Then， the MATLAB programs were written to get the change trend of sliding and rolling friction power losses along the action line. The influences of basic gear geometric parameters， gear ratio， and load on the sliding and rolling friction power loss were investigated. Finally， the effects of module， pressure angle and gear ratio on the meshing power losses were tested in the FZG backtoback gear test rig. This methodology may be helpful to the design of low power losses gear systems．