4篇
您的检索式：作者名="Qianlong Wei"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Targeted energy transfer of a parallel nonlinear energy sink显示文摘A parallel nonlinear energy sink(NES) is proposed and analyzed. The parallel NES is composed of a vibro-impact(VI) NES and a cubic NES. The dynamical equation is given, and the essential analytical investigation is carried out to deal with the cubic nonlinearity and impact nonlinearity. Multiple time-scale expansion is introduced, and the zeroth order is derived to give a rough outline of the system. The underlying Hamilton dynamic equation is given, and then the optimal stiffness is expressed. The clearance is regarded as a critical factor for the VI. Based on the periodical impact treatment by analytical investigation, the relationships of the cubic stiffness, the clearance, and the zeroth-order attenuation amplitude of the linear primary oscillator(LPO) are obtained.A cubic NES under the optimal condition is compared with the parallel NES. Harmonic signals, harmonic signals with noises, and the excitation generated by a second-order?lter are considered as the potential excitation forces on the system. The targeted energy transfer(TET) in the designed parallel NES is shown to be more e?cient. | Yimin WEI Sha WEI Qianlong ZHANG Xinjian DONG Zhike PENG Wenming ZHANG | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，5： | 4 |
| 2 | Uncertainty quantification for stochastic dynamical systems using time-dependent stochastic bases显示文摘A novel method based on time-dependent stochastic orthogonal bases for stochastic response surface approximation is proposed to overcome the problem of significant errors in the utilization of the generalized polynomial chaos(GPC) method that approximates the stochastic response by orthogonal polynomials. The accuracy and effectiveness of the method are illustrated by different numerical examples including both linear and nonlinear problems. The results indicate that the proposed method modifies the stochastic bases adaptively, and has a better approximation for the probability density function in contrast to the GPC method. | Jinchun LAN Qianlong ZHANG Sha WEI Zhike PENG Xinjian DONG Wenming ZHANG | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，1： | 1 |
| 3 | Multi-parametric Sensitivity Analysis of Improved Transformer Thermal Models Considering Nonlinear Effect of Oil Time Constant显示文摘This paper aims to develop an approach to investigating the effect of a particular parameter on the output accuracy of transformer thermal models,i.e.sensitivity analysis,which can not only reveal the most sensitive parameter of a thermal model but also improve model output accuracies.For the first time,the nonlinear time constant(NTC)of transformer oil is proposed to reshape three practical top-oil temperature models based on an expression of nonlinear thermal conductance:the modified IEEE clause 7 model,Swift’s model,and Susa’s model.Then,the multi-parametric sensitivity analysis(MPSA)is undertaken to reveal the effect of each parameter on the model output accuracy.Through onsite data validation,the results show that the accuracy performance of the proposed NTC thermal models are improved significantly by considering the nonlinear effect of oil time constant.Moreover,the derived sensitivity performances can clearly reveal the most dominant parameter of the model,so as to simplify the model parameter identification process by reducing the number of insensitive parameters.Finally,the heat-run test data is used as a reference to validate parameters optimized through a genetic algorithm(GA),which demonstrates that the proposed NTC IEEE model has not only one sensitive parameter but also superior accuracy performance. | Tong Qian Qianlong Wei Zeyuan Yu Wenhu Tang Qing-Hua Wu | 2023 | CSEE Journal of Power and Energy Systems2023，9，5： | 0 |
| 4 | Direct synthesis of benzoxazinones via Cp*Co(Ⅲ)-catalyzed C-H activation and annulation of sulfoxonium ylides with dioxazolones显示文摘A highly novel and direct synthesis of benzoxazinones was developed via Cp*Co(Ⅲ)-catalyzed C-H activation and[3+3]annulation between sulfoxonium ylides and dioxazolones.The reaction is conducted under base-free conditions and tolerates various functional groups.Starting from diverse readily available sulfoxonium ylides and dioxazolones,a variety of benzoxazinones could be synthesized in one step in 32%-75%yields. | Yongqi Yu Zhen Xia Qianlong Wu Da Liu Lin Yu Yuanjiu Xiao Ze Tan Wei Deng Gangguo Zhu | 2021 | Chinese Chemical Letters2021，32，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员