CAJ | 학술논문

采用单自由度系统研究了两栖车辆在规则波浪和风载荷激励下的非线性横摇动力学，建立了考虑非线性阻尼和非线性恢复力矩的非线性横摇动力学方程。非线性横摇动力学方程对应的哈密尔顿函数表明，当只有波浪扰动力矩作用时，非线性横摇运动是对称的；当有风载荷作用时，两栖车辆的非线性横摇运动不在对称。采用梅尔尼科夫法给出了激励幅值的阈值范围。最后，采用四阶龙格库塔法对两栖车辆的非线性横摇运动方程在不同的外载荷参数下进行数值积分。结果表明，两栖车辆横摇在风浪联合作用下表现出明显的非线性特性。
채용단자유도계통연구료량서차량재규칙파랑화풍재하격려하적비선성횡요동역학，건립료고필비선성조니화비선성회복력구적비선성횡요동역학방정。비선성횡요동역학방정대응적합밀이돈함수표명，당지유파랑우동력구작용시，비선성횡요운동시대칭적；당유풍재하작용시，량서차량적비선성횡요운동불재대칭。채용매이니과부법급출료격려폭치적역치범위。최후，채용사계룡격고탑법대량서차량적비선성횡요운동방정재불동적외재하삼수하진행수치적분。결과표명，량서차량횡요재풍랑연합작용하표현출명현적비선성특성。
Nonlinear amphibious vehicle rolling under regular waves and wind load is analyzed by a single degree of freedom sys-tem.Considering nonlinear damping and restoring moments,a nonlinear rolling dynamical equation of amphibious vehicle is es-tablished.The Hamiltonian function of the nonlinear rolling dynamical equation of amphibious vehicle indicate when subjected to joint action of periodic wave excitation and crosswind,the nonlinear rolling system degenerates into being asymmetric.The threshold value of excited moment of wave and wind is analyzed by the Melnikov method.Finally,the nonlinear rolling motion response and phase portrait were simulated by four order Runge-Kutta method at different excited moment parameters.