阶梯式基础地基应力计算

通过对刚体理论下地基应力计算方法的分析研究,在其基本假定的基础上,推出了条形基础的竖直基底压力和水平基底压力的计算公式;作为通用解法,有使倾斜偏心荷载作用下,阶梯式基础的地基应力的计算更加简便,并与规范配套的特点。     

客车CAN总线简介及应用

简要介绍CAN总线的发展历程,CAN总线在客车中的应用。     

盘锦市普通公路工程招标投标报价策略研究

本文分析了盘锦市普通公路工程造价构成的特点,提出了投标报价的可行策略,为投标单位确定有竞争力的投标报价提供了指导意见。     

公路隧道火烧应急检测

火烧是目前公路隧道常见事故之一, 由于隧道结构狭长、 空间小、 通风条件差等特点一直是应急检测的难点。 文章以火场温度分析为基础, 依托实际工程, 阐明火烧应急检测内容, 为养护决策提供依据。     

Numerical method of electromagnetic pulse response of conductor with complex load北大核心CSCD

[Objectives]Electromagnetic pulse can seriously affect and even destroy naval shipborne electronic information systems, weapons, equipment and so on. Due to the complexity of the antenna port load circuit, it is necessary to formulate a numerical method which can easily obtain the antenna load current. [Methods]The induced current of the terminal is obtained on the basis of the finite-difference time-domain (FDTD) and Holland model. According to the Thévenin equivalent circuit, the conductor is equivalent to the voltage source to realize decoupling between the conductor and load end, and the load circuit is solved using Simulink software.[Results]Compared with the traditional terminal model, this method is simple and feasible for high-order circuit processing. The effectiveness of the model is verified using non-linear elements and parallel capacitors and resistors as the load respectively. The results show that the calculation results of this method are consistent with those of the traditional methods. Finally, the antenna of the end-connected protect- or is calculated. The results show that the lead inductance caused by the installation of the protector is an important factor affecting the protection performance.[Conclusions]The method proposed in this paper can greatly reduce the simulation complexity of the coupling current of an antenna with a complex load, giving it useful reference value for the field of ship electromagnetic pulse protection design. © 2023 Editorial Department of Chinese Journal of Ship Research. All Rights Reserved.