57results about How to "Reliable Simulated Values" patented technology

The invention relates to a collaborative optimization method of a two-line vertical and end part longitudinal damper damping coefficient of a high-speed railway, and belongs to the technical field of high-speed railway suspension. A complete railway six-degree-of-freedom vertical vibration collaborative optimization simulation model of the high-speed railway is established, the uneven random input of the railway is used as input stimulation, the minimum of the vibration acceleration root-mean-square value of vehicle body vertical movement is taken as a design target, and optimal design is carried out to obtain an optimal damping coefficient of the two-line vertical and vehicle body end part longitudinal damper damping coefficient of the high-speed railway. Through a design example and SIMPACK simulation verification, the method can obtain the accurate and reliable two-line vertical and vehicle body end part longitudinal damper damping coefficient value, and provides a reliable design method for the design of the two-line vertical and vehicle body end part longitudinal damper damping coefficient of the high-speed railway. The method can improve the design level of the suspension system of the high-speed railway, improves vehicle driving safety and stability, can lower product design and experiment cost and enhances the international market competitiveness of the railway vehicle in China.

The invention relates to an analytic calculation method of an optimal damping coefficient of an anti-snake movement damper of a high-speed railway vehicle, and belongs to the technical field of the high-speed railway vehicle suspension. A Hurwitz stability criterion is used for calculating to obtain a minimum critical damping coefficient of the anti-snake movement damper, a maximum critical damping coefficient of the anti-snake movement damper is calculated by requirements on the steering resistance coefficient of a bogie when a vehicle carries out curve driving, and an optimal damping coefficient of the anti-snake movement damper is calculated by a golden section principle. Through a design example and SIMPACK simulation verification, the method can obtain the accurate and reliable damping coefficient value of the anti-snake movement damper, and provides a reliable design method for the design of the damping coefficient of the anti-snake movement damper of the high-speed railway vehicle. The method can improve the design level of the suspension system of the high-speed railway vehicle, and vehicle riding comfort and safety, simultaneously can lower product design and experiment cost and enhances the international market competitiveness of the railway vehicle in China.

The invention relates to a design method for the damping coefficient of a vehicle body end transverse damper of a high-speed rail vehicle, and belongs to the technical field of suspension of high-speed rail vehicles. As a seventeen-freedom-degree transverse vibration optimization design simulation model of the whole rail vehicle is set up, and irregularity in the railway direction and horizontal irregularity serve as input excitation, with the minimum root-mean-square value of vibration acceleration of vehicle body side roll motion as the design target, the optimal damping coefficient of the vehicle body end transverse damper is obtained through optimization design. It can be known through design examples and SIMPACK simulation verification that the damping coefficient value of the vehicle body end transverse damper can be obtained accurately and reliably through the method, and a reliable design method is provided for designing the damping coefficient of the vehicle body end transverse damper of the high-speed rail vehicle. By means of the method, the design level of a high-speed rail vehicle suspension system can be improved, traveling safety and stability of the vehicle are improved, product design and test cost can be reduced, and the international market competitiveness of the rail vehicles in China is enhanced.

The invention relates to a design method for an optimal damping ratio of a primary vertical suspension of a high-speed rail vehicle, and belongs to the technical field of suspension of high-speed rail vehicles. According to the design method, a target function of a damping ratio of a primary vertical suspension system is established by establishing a two-degree-of-freedom driving vertical vibration model of a 1/4 vehicle body of the high-speed rail vehicle, the optimal damping ratio and a maximum allowable damping ratio of the primary vertical suspension system are calculated, and the optimal damping ratio of the primary vertical suspension system is calculated by utilizing a golden section principle. Through design instances and SIMPACK simulation verification, the method can obtain accurate and reliable optimal damping ratio of the primary vertical suspension system, and the reliable design method is provided for the design of the damping ratio of the primary vertical suspension of the high-speed rail vehicle. With the method, the design level and the product quality of the suspension system of the high-speed rail vehicle can be improved, the riding comfort and safety of the vehicle can be improved, the product design and test expenses can be reduced, and the international market competitiveness of rail vehicles in China can be enhanced.

The invention relates to a collaborative optimization method of a one-line and two-line vertical suspension damping ratio of a high-speed railway vehicle, and belongs to the technical field of high-speed railway vehicle suspension. A vertical vibration collaborative optimization simulation model of a one-line and two-line vertical suspension system is constructed, the uneven random input of a railway is used as input stimulation, the minimum of the vibration acceleration root-mean-square value of vehicle body vertical movement is taken as a design target, and optimal design is carried out to obtain an optimal damping ratio of an optimal one-line and two-line vertical suspension damping ratio. Through a design example and SIMPACK simulation verification, the method can obtain the accurate and reliable optimal damping ratio of the one-line vertical suspension and the two-line vertical suspension system, and provides a reliable design method for the design of the one-line and two-line vertical suspension damping ratio of the high-speed railway vehicle. The method can improve the design level and the vehicle riding comfort of the suspension system of the high-speed railway vehicle, can lower product design and experiment cost and enhances the international market competitiveness of the railway vehicle in China.

The invention relates to a method for designing the length of a torsion pipe of an external biasing non-coaxial cab stabilizer, which belongs to the technical field of the cab suspension. The length of the torsion pipe is adopted as a parameter, a torsion pipe length design mathematic model of the stabilizer bar is established by utilizing a load coefficient expression of a torsion rubber bushing, an equivalent combined linear rigidness expression of the rubber bushing and an equivalent linear rigidness expression of the torsion pipe, and the torsion pipe length design mathematic model is solved by utilizing a Matlab program. By adopting the method, an accurate and reliable torsion pipe length design value can be acquired by virtue of a design example and the ANSYS simulation verification, and a reliable technical foundation can be provided for the design of the stabilizer bar system and the development of the CAD software. By utilizing the method, on the premise of not increasing the product cost, not only can the design level and design quality of the stabilizer bar system be improved by virtue of adjustable design of the torsion pipe length, but also the design requirement of the roll angle rigidness of the stabilizer bar system can be met, and the driving smoothness and safety of a vehicle can be improved; meanwhile, the design and experiment expense also can be reduced.

The invention relates to a torque tube stress intensity checking method for an externally biased non-coaxial type cab stabilizer bar, and belongs to the technical field of vehicle cab suspension. A bending load coefficient of a torque tube is built according to the structure parameters, material characteristic parameters and loads of an externally biased non-coaxial type cab stabilizer bar system and the torque tube by utilization of the relation between bending and torsional deformation and loads of the torque tube; the torque tube stress intensity checking method for the externally biased non-coaxial type cab stabilizer bar is built according to the bending normal stress and torsional shearing stress of the torque tube. Through living example calculation and ANSYS emulation proofs, it can be known that an accurate and reliable torque tube stress intensity calculation value can be obtained according to the method, and the stress intensity checking method is reliable for design of the cab stabilizer bar system. By utilization of the method, the design level, quality and performance of the cab stabilizer bar system can be improved, and running smoothness and safety of vehicles are improved. Meanwhile, the design and testing expenses can be reduced, and the product development speed is increased.

The invention relates to a collaborative optimization method for damping coefficients of a high-speed rail secondary transverse damper and a vehicle body end transverse damper, and belongs to the technical field of suspension of high-speed rail vehicles. As a seventeen-freedom-degree transverse vibration collaborative optimization simulation model of a whole high-speed rail vehicle is set up, and irregularity in the railway direction and horizontal irregularity serve as input excitation, with the minimum root-mean-square value of vibration weighted acceleration of vehicle body transverse motion as the design target, the optimal damping coefficients of the high-speed rail secondary transverse damper and the vehicle body end transverse damper are obtained through optimization design. It can be known through design examples and SIMPACK simulation verification that the damping coefficient values of the high-speed rail secondary transverse damper and the vehicle body end transverse damper can be obtained accurately and reliably through the method, and a reliable design method is provided for designing the damping coefficients of the high-speed rail secondary transverse damper and the vehicle body end transverse damper. By means of the method, the design level of a high-speed rail vehicle suspension system can be improved, traveling safety and stability of the vehicle are improved, product design and test cost can be reduced, and the international market competitiveness of the rail vehicles in China is enhanced.

The invention discloses a method for calculating the deformation of an external bias non-coaxial cab stabilizer bar system and belongs to the technical field of vehicle cab suspension. The deformation of the external bias non-coaxial cab stabilizer bar system can be analyzed and calculated based on the structural parameters, material property parameters and borne loads of an external bias non-coaxial cab stabilizer bar and a rubber bushing according to the equivalent line rigidity of a torsion tube, the load parameters of a torsion rubber bushing, and the radial rigidity and combined equivalent line rigidity of the rubber bushing. Through practical calculation and ANSYS simulation verification, an accurate and reliable calculation value of the external bias non-coaxial cab stabilizer bar system can be obtained with the method, a reliable technical foundation is laid for analytical design of the external bias non-coaxial cab stabilizer bar system and development of CAD design software, and then the design level and product performance of the stabilizer bar and vehicle traveling smoothness are improved, design and test expenses are reduced, and product development speed is increased.

The invention relates to an analytic calculation method for the optimal damping ratio of seat suspension of a high-speed rail vehicle, and belongs to the technical field of suspension of high-speed rail vehicles. As a 1/4 vehicle body-seat traveling vertical vibration model of the rail vehicle is set up, an objective function of the optimal damping ratio of seat suspension is set up by means of the random vibration theory and analytically calculated to obtain the optimal damping ratio of seat suspension. It can be known through design examples and SIMPACK simulation verification that the optimal damping ratio of seat suspension can be obtained accurately and reliably through the method, and a reliable design method is provided for designing the optimal damping ratio of seat suspension of the high-speed rail vehicle. By means of the method, the design level and product quality of a high-speed rail vehicle suspension system can be improved, riding comfort of the vehicle is improved, product design and test cost can be reduced, the product design cycle is shortened, and the international market competitiveness of the rail vehicles in China is enhanced.

The present invention relates to a high-speed rail vertical damper and vehicle body end part longitudinal damper damping coefficient collaborative optimization method, and belongs to the technical field of high-speed railway vehicle suspension technology. A high-speed rail complete vehicle six degree-of-freedom vertical vibration collaborative optimization simulation model is established, track longitudinal irregularity is used as an input stimulus, minimization of a root mean square value of weighed vibration acceleration is the design object, and optimal damping coefficients of primary vertical, secondary vertical and vehicle body end part longitudinal dampers of a high-speed rail are obtained through design optimization. Through design examples and SIMPACK simulation verification, damping coefficients of the primary vertical, secondary vertical and vehicle body end part longitudinal dampers can be accurately and reliably obtained through the method, and a reliable design method is provided for the design of the damping coefficients of the primary vertical, secondary vertical and vehicle body end part longitudinal dampers. By using the method, the design level of a high-speed railway suspension system is raised, vehicle travelling safety and stability are raised, and design and testing expenses are also reduced.

The invention relates to a design method for the damping coefficient of end longitudinal shock absorbers of a high-speed railway vehicle body, and belongs to the technical field of high-speed railway vehicle suspension. Through establishing a six-freedom-degree vertical vibration optimal design simulation model of a whole railway vehicle, with railway vertical irregularity being input excitation and the minimum root-mean-square value of vibration acceleration of vehicle body bounce movement being a design target, the optimal damping coefficient of the end longitudinal shock absorbers of the vehicle body is obtained through optimal design. Through a design example and SIMPACK simulation verification, the accurate and reliable damping coefficient value of the end longitudinal shock absorbers of the vehicle body can be obtained through the method, and the reliable design method is provided for the design of the damping coefficient of the end longitudinal shock absorbers of the high-speed railway vehicle body. By the utilization of the method, the design level of a high-speed railway vehicle suspension system can be increased, and the driving safety and stability of the vehicle are improved; meanwhile, the product design and test costs can be lowered, so that the international market competitiveness of the railway vehicle in China is enhanced.

The invention relates to an analytic calculation method of an optimal damping ratio of the two-line vertical suspension of a high-speed railway vehicle, and belongs to the technical field of the high-speed railway vehicle suspension. A 1/4 vehicle body four-degree-of-freedom driving vertical vibration model is established, the optimal human body riding comfort and minimum vertical force borne on a wheel set and an axle are independently taken as a design target, calculation is carried out to obtain the optimal damping ratio of a two-line vertical suspension system on the basis of comfort and safety, and the calculation is carried out to obtain the optimal damping ratio of the two-line vertical suspension system by a golden section principle. Through a design example and SIMPACK simulation verification, the method can obtain the accurate and reliable optimal damping ratio of the two-line vertical suspension system, and provides a reliable design method for the design of the damping ratio of the two-line vertical suspension of the high-speed railway vehicle. The method can improve the design level of the suspension system of the high-speed railway vehicle, and vehicle riding comfort and safety, can lower design and experiment cost and enhances the international market competitiveness of the railway vehicle in China.

The invention relates to an analytic calculation method of an optimal damping ratio of the two-line horizontal suspension of a high-speed railway vehicle, and belongs to the technical field of the high-speed railway vehicle suspension. A 1/2 vehicle body traveling yawing vibration model is established, the optimal human body riding comfort and minimum horizontal force borne on a wheel set and an axle are independently taken as a design target, calculation is carried out to obtain the optimal damping ratio of a two-line horizontal suspension system on the basis of comfort and safety, and the calculation is carried out to obtain the optimal damping ratio of the two-line horizontal suspension system by a golden section principle. Through a design example and SIMPACK simulation verification, the method can obtain the accurate and reliable optimal damping ratio of the two-line horizontal suspension system, and provides a reliable design method for the design of the damping ratio of the two-line horizontal suspension of the high-speed railway vehicle. The method can improve the design level of the suspension system of the high-speed railway vehicle and vehicle riding comfort and safety, simultaneously can lower design and experiment cost and enhances the international market competitiveness of the railway vehicle in China.

The invention relates to an analytic calculating method for the optimal damping ratio of a secondary vertical suspension of a low-speed rail vehicle and belongs to the technical field of vehicle suspensions of low-speed rail vehicles. A 1/4 vehicle body four-degree-of-freedom running vertical vibration model of the low-speed rail vehicle is established, a target function of the optimal damping ratio of the secondary vertical suspension is established based on a random vibration theory, analytic calculating is conducted, and therefore the optimal damping ratio of a secondary vertical suspension system of the low-speed rail vehicle is obtained. It can be known through a design example and SIMPACK simulation verification that the accurate and reliable optimal damping ratio of the secondary vertical suspension system can be obtained, and the reliable design method is provided for design of the damping ratio of the secondary vertical suspension of the low-speed rail vehicle. By means of the method, the design level and the product quality of the suspension system of the low-speed rail vehicle can be improved, and the riding comfort of the vehicle is improved; meanwhile, the product designing and testing cost can also be reduced, the product design period is shortened, and the international market competition ability of the track vehicle of China is improved.

The invention relates to a method for checking twisted pipe stress intensity of an inner biased non-coaxial type cab stabilizer bar and belongs to the technical field of vehicle cab suspension. According to an inner biased non-coaxial type cab stabilizer bar system and structure parameters and material characteristic parameters of a twisted pipe, the bending load coefficient of the twisted pipe is established by utilizing the relations of twisted pipe bending, torsional deflection and load, and the method for checking twisted pipe stress intensity of the inner biased non-coaxial type cab stabilizer bar is established through bending normal stress and torsional shear stress. As can be known through example calculation and ANSYS simulation verification, the accurate and reliable twisted pipe stress intensity calculation value of the inner biased non-coaxial type cab stabilizer bar can be obtained through the method, and a reliable stress verifying calculation method is provided for the design of the cab stabilizer bar system. The method can improve the design level, quality and performance of the cab stabilizer bar system and improve vehicle running smoothness and safety; and the design and testing expense can be reduced.

The present invention relates to an optimization design method for an optimum damping ratio of a secondary transverse suspension of a high-speed rail vehicle, and belongs to the technical field of high-speed rail vehicle suspensions. The method comprises: constructing a yawing vibration optimization design simulation model of a secondary transverse suspension system by establishing a 1/2 vehicle body driving yawing vibration differential equation and using MATLAB/Simulink simulation software; obtaining an optimum damping ratio, based on comfort and based on safety, of the secondary transverse suspension system by taking a non-smooth random input in an orbit direction as input excitation and taking a smallest vibration acceleration root mean square of the vehicle body and wheel yaw motion as a design target; and further carrying out calculation to obtain the optimum damping ratio of the secondary transverse suspension system. As known from design examples and SIMPACK simulation verification, an accurate and reliable optimum damping ratio of the secondary transverse suspension system can be obtained by the method provided by the present invention, thereby providing a reliable design method for the damping ratio of the secondary transverse suspension of the high-speed rail vehicle. By use of the optimization design method for the optimum damping ratio of the secondary transverse suspension of the high-speed rail vehicle, the design level of the suspension system of the rail vehicle and comfort and safety of vehicle riding can be improved.